//過濾數(shù)字
//特殊用途
//不緩存
//正則匹配
匹配中文字符的正則表達(dá)式: [\u4e00-\u9fa5]
匹配雙字節(jié)字符(包括漢字在內(nèi)):[^\x00-\xff]
匹配空行的正則表達(dá)式:\n[\s| ]*\r
匹配HTML標(biāo)記的正則表達(dá)式:/<(.*)>.*<\/\1>|<(.*) \/>/
匹配首尾空格的正則表達(dá)式:(^\s*)|(\s*$)(像vbscript那樣的trim函數(shù))
匹配Email地址的正則表達(dá)式:\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
匹配網(wǎng)址URL的正則表達(dá)式:http://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?
以下是例子:
利用正則表達(dá)式限制網(wǎng)頁表單里的文本框輸入內(nèi)容:
用正則表達(dá)式限制只能輸入中文:onkeyup="value=value.replace(/[^\u4E00-\u9FA5]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\u4E00-\u9FA5]/g,''))"
1.用正則表達(dá)式限制只能輸入全角字符: onkeyup="value=value.replace(/[^\uFF00-\uFFFF]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\uFF00-\uFFFF]/g,''))"
2.用正則表達(dá)式限制只能輸入數(shù)字:onkeyup="value=value.replace(/[^\d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"
3.用正則表達(dá)式限制只能輸入數(shù)字和英文:onkeyup="value=value.replace(/[\W]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"
//消除圖像工具欄
//無提示關(guān)閉
function Close()
{
var ua=navigator.userAgent
var ie=navigator.appName=="Microsoft Internet Explorer"?true:false
if(ie)
{
var IEversion=parseFloat(ua.substring(ua.indexOf("MSIE ")+5,ua.indexOf(";",ua.indexOf("MSIE "))))
if(IEversion< 5.5)
{
var str = '<object id=noTipClose classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">'
str += '<param name="Command" value="Close"></object>';
document.body.insertAdjacentHTML("beforeEnd", str);
document.all.noTipClose.Click();
}
else
{
window.opener =null;
window.close();
}
}
else
{
window.close()
}
}
//取得控件得絕對位置(1)
<script language="javascript">
function getoffset(e)
{
var t=e.offsetTop;
var l=e.offsetLeft;
while(e=e.offsetParent)
{
t+=e.offsetTop;
l+=e.offsetLeft;
}
var rec = new Array(1);
rec[0] = t;
rec[1] = l;
return rec
}
</script>
//獲得控件的絕對位置(2)
oRect = obj.getBoundingClientRect();
oRect.left
oRect.
//最小化,最大化,關(guān)閉
//光標(biāo)停在文字最后
<script language="javascript">
function cc()
{
var e = event.srcElement;
var r =e.createTextRange();
r.moveStart('character',e.value.length);
r.collapse(true);
r.select();
}
</script>
<input type=text name=text1 value="123" onfocus="cc()">
//頁面進(jìn)入和退出的特效
進(jìn)入頁面<meta http-equiv="Page-Enter" content="revealTrans(duration=x, transition=y)">
推出頁面<meta http-equiv="Page-Exit" content="revealTrans(duration=x, transition=y)">
這個(gè)是頁面被載入和調(diào)出時(shí)的一些特效。duration表示特效的持續(xù)時(shí)間,以秒為單位。transition表示使
用哪種特效,取值為1-23:
0 矩形縮小
1 矩形擴(kuò)大
2 圓形縮小
3 圓形擴(kuò)大
4 下到上刷新
5 上到下刷新
6 左到右刷新
7 右到左刷新
8 豎百葉窗
9 橫百葉窗
10 錯(cuò)位橫百葉窗
11 錯(cuò)位豎百葉窗
12 點(diǎn)擴(kuò)散
13 左右到中間刷新
14 中間到左右刷新
15 中間到上下
16 上下到中間
17 右下到左上
18 右上到左下
19 左上到右下
20 左下到右上
21 橫條
22 豎條
23
//網(wǎng)頁是否被檢索
//打印分頁
//設(shè)置打印
<object id="factory" style="display:none" viewastext
classid="clsid:1663ed61-23eb-11d2-b92f-008048fdd814"
codebase="http://www.meadroid.com/scriptx/ScriptX.cab#Version=5,60,0,360"
></object>
<input type=button value=頁面設(shè)置 onclick="factory.printing.PageSetup()">
<input type=button value=打印預(yù)覽 onclick="factory.printing.Preview()">
<script language=javascript>
function window.onload()
{
// -- advanced features
factory.printing.SetMarginMeasure(2) // measure margins in inches
factory.printing.SetPageRange(false, 1, 3) // need pages from 1 to 3
factory.printing.printer = "HP DeskJet 870C"
factory.printing.copies = 2
factory.printing.collate = true
factory.printing.paperSize = "A4"
factory.printing.paperSource = "Manual feed"
// -- basic features
factory.printing.header = "居左顯示&b居中顯示&b居右顯示頁碼,第&p頁/共&P頁"
factory.printing.footer = "(自定義頁腳)"
factory.printing.portrait = false
factory.printing.leftMargin = 0.75
factory.printing.topMargin = 1.5
factory.printing.rightMargin = 0.75
factory.printing.bottomMargin = 1.5
}
function Print(frame) {
factory.printing.Print(true, frame) // print with prompt
}
</script>
<input type=button value="打印本頁" onclick="factory.printing.Print(false)">
<input type=button value="頁面設(shè)置" onclick="factory.printing.PageSetup()">
<input type=button value="打印預(yù)覽" onclick="factory.printing.Preview()"><br>
<a href="http://www.meadroid.com/scriptx/docs/printdoc.htm?static" target=_blank>具體使用手冊,更多信息,點(diǎn)這里</a>
//自帶的打印預(yù)覽
WebBrowser.ExecWB(1,1) 打開
Web.ExecWB(2,1) 關(guān)閉現(xiàn)在所有的IE窗口,并打開一個(gè)新窗口
Web.ExecWB(4,1) 保存網(wǎng)頁
Web.ExecWB(6,1) 打印
Web.ExecWB(7,1) 打印預(yù)覽
Web.ExecWB(8,1) 打印頁面設(shè)置
Web.ExecWB(10,1) 查看頁面屬性
Web.ExecWB(15,1) 好像是撤銷,有待確認(rèn)
Web.ExecWB(17,1) 全選
Web.ExecWB(22,1) 刷新
Web.ExecWB(45,1) 關(guān)閉窗體無提示
<style media=print>
.Noprint{display:none;}<!--用本樣式在打印時(shí)隱藏非打印項(xiàng)目-->
.PageNext{page-break-after: always;}<!--控制分頁-->
</style>
<object id="WebBrowser" width=0 height=0 classid="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2">
</object>
<center class="Noprint" >
<input type=button value=打印 onclick=document.all.WebBrowser.ExecWB(6,1)>
<input type=button value=直接打印 onclick=document.all.WebBrowser.ExecWB(6,6)>
<input type=button value=頁面設(shè)置 onclick=document.all.WebBrowser.ExecWB(8,1)>
</p>
<p> <input type=button value=打印預(yù)覽 onclick=document.all.WebBrowser.ExecWB(7,1)>
</center>
//去掉打印時(shí)的頁眉頁腳
<script language="JavaScript">
var HKEY_Root,HKEY_Path,HKEY_Key;
HKEY_Root="HKEY_CURRENT_USER";
HKEY_Path="\\Software\\Microsoft\\Internet Explorer\\PageSetup\\";
//設(shè)置網(wǎng)頁打印的頁眉頁腳為空
function PageSetup_Null()
{
try
{
var Wsh=new ActiveXObject("WScript.Shell");
HKEY_Key="header";
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"");
HKEY_Key="footer";
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"");
}
catch(e){}
}
//設(shè)置網(wǎng)頁打印的頁眉頁腳為默認(rèn)值
function PageSetup_Default()
{
try
{
var Wsh=new ActiveXObject("WScript.Shell");
HKEY_Key="header";
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"&w&b頁碼,&p/&P");
HKEY_Key="footer";
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"&u&b&d");
}
catch(e){}
}
</script>
<input type="button" value="清空頁碼" onclick=PageSetup_Null()>
<input type="button" value="恢復(fù)頁碼" onclick=PageSetup_Default()>
//瀏覽器驗(yàn)證
function checkBrowser()
{
this.ver=navigator.appVersion
this.dom=document.getElementById?1:0
this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom)?1:0;
this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0;
this.ie4=(document.all && !this.dom)?1:0;
this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0;
this.ns4=(document.layers && !this.dom)?1:0;
this.mac=(this.ver.indexOf('Mac') > -1) ?1:0;
this.ope=(navigator.userAgent.indexOf('Opera')>-1);
this.ie=(this.ie6 || this.ie5 || this.ie4)
this.ns=(this.ns4 || this.ns5)
this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns5 || this.ns4 || this.mac || this.ope)
this.nbw=(!this.bw)
return this;
}
//計(jì)算內(nèi)容寬和高
<SCRIPT language="javascript">
function test(obj)
{
var range = obj.createTextRange();
alert("內(nèi)容區(qū)寬度: " + range.boundingWidth
+ "px\r\n內(nèi)容區(qū)高度: " + range.boundingHeight + "px");
}
</SCRIPT>
<BODY>
<Textarea id="txt" height="150">sdf</textarea><INPUT type="button" value="計(jì)算內(nèi)容寬度" onClick="test(txt)">
</BODY>
//無模式的提示框
//屏蔽按鍵
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<noscript><meta http-equiv="refresh" content="0;url=about:noscript"></noscript>
<title>屏蔽鼠標(biāo)右鍵、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格鍵</title>
</head>
<body>
<script language="Javascript"><!--
//屏蔽鼠標(biāo)右鍵、Ctrl+N、Shift+F10、F11、F5刷新、退格鍵
//Author: meizz(梅花雨) 2002-6-18
function document.oncontextmenu(){event.returnValue=false;}//屏蔽鼠標(biāo)右鍵
function window.onhelp(){return false} //屏蔽F1幫助
function document.onkeydown()
{
if ((window.event.altKey)&&
((window.event.keyCode==37)|| //屏蔽 Alt+ 方向鍵 ←
(window.event.keyCode==39))) //屏蔽 Alt+ 方向鍵 →
{
alert("不準(zhǔn)你使用ALT+方向鍵前進(jìn)或后退網(wǎng)頁!");
event.returnValue=false;
}
/* 注:這還不是真正地屏蔽 Alt+ 方向鍵,
因?yàn)?nbsp;Alt+ 方向鍵彈出警告框時(shí),按住 Alt 鍵不放,
用鼠標(biāo)點(diǎn)掉警告框,這種屏蔽方法就失效了。以后若
有哪位高手有真正屏蔽 Alt 鍵的方法,請告知。*/
if ((event.keyCode==8) || //屏蔽退格刪除鍵
(event.keyCode==116)|| //屏蔽 F5 刷新鍵
(event.ctrlKey && event.keyCode==82)){ //Ctrl + R
event.keyCode=0;
event.returnValue=false;
}
if (event.keyCode==122){event.keyCode=0;event.returnValue=false;} //屏蔽F11
if (event.ctrlKey && event.keyCode==78) event.returnValue=false; //屏蔽 Ctrl+n
if (event.shiftKey && event.keyCode==121)event.returnValue=false; //屏蔽 shift+F10
if (window.event.srcElement.tagName == "A" && window.event.shiftKey)
window.event.returnValue = false; //屏蔽 shift 加鼠標(biāo)左鍵新開一網(wǎng)頁
if ((window.event.altKey)&&(window.event.keyCode==115)) //屏蔽Alt+F4
{
window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px");
return false;
}
}
</script>
屏蔽鼠標(biāo)右鍵、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格鍵
</body>
</html>
//屏蔽打印
<style>
@media print{
* {display:none}
}
</style>
//移動的圖層,拖動
1.<span style='position:absolute;width:200;height:200;background:red' onmousedown=MouseDown(this) onmousemove=MouseMove() onmouseup=MouseUp()>meizz</span>
<script language=javascript>
var Obj;
function MouseDown(obj)
{
Obj=obj;
Obj.setCapture();
Obj.l=event.x-Obj.style.pixelLeft;
Obj.t=event.y-Obj.style.pixelTop;
}
function MouseMove()
{
if(Obj!=null)
{
Obj.style.left = event.x-Obj.l;
Obj.style.top = event.y-Obj.t;
}
}
function MouseUp()
{
if(Obj!=null)
{
Obj.releaseCapture();
Obj=null;
}
}
</script>
2.
<div id="myDiv" src="logo.gif" ondrag="doDrag();" onmouseover="this.style.cursor='hand'" style="position:absolute;left=100;top=100;" onmousedown="doMouseDown();">
<a href="#" onclick="return false"><h1>wlecome</h1></a>
</div>
<script language="JavaScript" type="text/javascript">
var orgMouseX;
var orgMouseY;
var orgObjX;
var orgObjY;
function doDrag()
{
var myObject=document.all.myDiv;
var x=event.clientX;
var y=event.clientY;
myObject.style.left=x-(orgMouseX-orgObjX);
myObject.style.top=y-(orgMouseY-orgObjY);
}
function doMouseDown()
{
orgMouseX=event.clientX;
orgMouseY=event.clientY;
orgObjX=parseInt(document.all.myDiv.style.left);
orgObjY=parseInt(document.all.myDiv.style.top);
}
</script>
//文檔狀態(tài)改變
<iframe src="a.html" id="f" name="f" scrolling="no" frameborder=0 marginwidth=0 marginheight=0></iframe>
<script>
var doc=window.frames["f"].document;
function s(){
if (doc.readyState=="complete"){
document.all.f.style.height=doc.body.scrollHeight
document.all.f.style.width=doc.body.scrollWidth
}
}
doc.onreadystatechange=s
</script>
//刷新后不變的文本框
//訪問剪貼板
//操作COOKIE
function SetCookie(sName, sValue)
{
document.cookie = sName + "=" + escape(sValue) + "; ";
}
function GetCookie(sName)
{
var aCookie = document.cookie.split("; ");
for (var i=0; i < aCookie.length; i++)
{
var aCrumb = aCookie[i].split("=");
if (sName == aCrumb[0])
return unescape(aCrumb[1]);
}
}
function DelCookie(sName)
{
document.cookie = sName + "=" + escape(sValue) + "; expires=Fri, 31 Dec 1999 23:59:59 GMT;";
}
//setTimeout增加參數(shù)
<script>
var _st = window.setTimeout;
window.setTimeout = function(fRef, mDelay) {
if(typeof fRef == 'function'){
var argu = Array.prototype.slice.call(arguments,2);
var f = (function(){ fRef.apply(null, argu); });
return _st(f, mDelay);
}
return _st(fRef,mDelay);
}
function test(x){
alert(x);
}
window.setTimeout(test,1000,'fason');
</script>
//自定義的apply,call
Function.prototype.apply = function (obj, argu) {
if (obj) obj.constructor.prototype._caller = this;
var argus = new Array();
for (var i=0;i<argu.length;i++)
argus[i] = "argu[" + i + "]";
var r;
eval("r = " + (obj ? ("obj._caller(" + argus.join(",") + ");") : ("this(" + argus.join(",") + ");")));
return r;
};
Function.prototype.call = function (obj) {
var argu = new Array();
for (var i=1;i<arguments.length;i++)
argu[i-1] = arguments[i];
return this.apply(obj, argu);
};
//下載文件
function DownURL(strRemoteURL,strLocalURL)
{
try
{
var xmlHTTP=new ActiveXObject("Microsoft.XMLHTTP");
xmlHTTP.open("Get",strRemoteURL,false);
xmlHTTP.send();
var adodbStream=new ActiveXObject("ADODB.Stream");
adodbStream.Type=1;//1=adTypeBinary
adodbStream.Open();
adodbStream.write(xmlHTTP.responseBody);
adodbStream.SaveToFile(strLocalURL,2);
adodbStream.Close();
adodbStream=null;
xmlHTTP=null;
}
catch(e)
{
window.confirm("下載URL出錯(cuò)!");
}
//window.confirm("下載完成.");
}
//檢驗(yàn)連接是否有效
function getXML(URL)
{
var xmlhttp = new ActiveXObject("microsoft.xmlhttp");
xmlhttp.Open("GET",URL, false);
try
{
xmlhttp.Send();
}
catch(e){}
finally
{
var result = xmlhttp.responseText;
if(result)
{
if(xmlhttp.Status==200)
{
return(true);
}
else
{
return(false);
}
}
else
{
return(false);
}
}
}
//POST代替FORM
//組件是否安裝
isComponentInstalled("{6B053A4B-A7EC-4D3D-4567-B8FF8A1A5739}", "componentID"))
//檢查網(wǎng)頁是否存在
function CheckURL(URL)
{
var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
xmlhttp.Open("GET",URL, false);
try
{
xmlhttp.Send();
var result = xmlhttp.status;
}
catch(e) {return(false); }
if(result==200)
{
return true;
}
xmlhttp = null;
return false;
}
//連接數(shù)據(jù)庫
<script language="javascript">
//用 JavaScript 寫服務(wù)器端連接數(shù)據(jù)庫的代碼示例
var conn = new ActiveXObject("ADODB.Connection");
conn.Open("Provider=SQLOLEDB.1; Data Source=localhost; User ID=sa; "
+"Password=; Initial Catalog=pubs");
var rs = new ActiveXObject("ADODB.Recordset");
var sql="select * from authors";
rs.open(sql, conn);
shtml = "<table width='100%' border=1>";
shtml +="<tr bgcolor='#f4f4f4'><td>au_id</td><td>au_lname</td><td>au_fname</td><td>phone</td><td>address</td><td> city</td><td>state</td><td>zip</td></tr>";
while(!rs.EOF)
{
shtml += "<tr><td>" + rs("au_id") + "</td><td>" + rs("au_lname") + "</td><td>" + rs("au_fname") + "</td><td>" + rs("phone") + "</td><td>" + rs("address") + "</td><td>" + rs("city") + "</td><td>" + rs("state") + "</td><td>" + rs("zip") + "</td></tr>";
rs.moveNext;
}
shtml += "</table>";
document.write(shtml);
rs.close();
rs = null;
conn.close();
conn = null;
</script>
//使用數(shù)據(jù)島
<html>
<body>
srno:<input type=text datasrc=#xmldate DataFLD=srno size="76"><BR>
times:<input type=text datasrc=#xmldate DataFLD=times size="76"><BR>
<input id="first" TYPE=button value="<< 第一條記錄" onclick="xmldate.recordset.moveFirst()">
<input id="prev" TYPE=button value="<上一條記錄" onclick="xmldate.recordset.movePrevious()">
<input id="next" TYPE=button value="下一條記錄>" onclick="xmldate.recordset.moveNext()">
<input id="last" TYPE=button value="最后一條記錄>>" onclick="xmldate.recordset.moveLast()">
<input id="Add" TYPE=button value="添加新記錄" onclick="xmldate.recordset.addNew()">
<XML ID="xmldate">
<infolist>
<info ><srno>20041025-01</srno><times>null</times></info>
<info ><srno>20041101-09</srno><times>2004年10月1日2點(diǎn)22分0秒</times></info>
</infolist>
</XML>
</body>
</html>
//獲得參數(shù)
<body>
<a href="javascript:location.href=location.href + '?a=1&b=2'">search</a>
<script language="JavaScript">
<!--
var a = location.search.substr(1);
if(a.length>0)
{
var re = /([^&]*?)\=([^&]*)/g
var s = a.match(re);
for(var i= 0;i<s.length;i++)
{
alert(s[i]);
alert(s[i].split("=")[1]);
}
}
//-->
</script>
</body>
//可編輯SELECT
//設(shè)置光標(biāo)位置
function getCaret(textbox)
{
var control = document.activeElement;
textbox.focus();
var rang = document.selection.createRange();
rang.setEndPoint("StartToStart",textbox.createTextRange())
control.focus();
return rang.text.length;
}
function setCaret(textbox,pos)
{
try
{
var r =textbox.createTextRange();
r.moveStart('character',pos);
r.collapse(true);
r.select();
}
catch(e)
{}
}
function selectLength(textbox,start,len)
{
try
{
var r =textbox.createTextRange();
r.moveEnd('character',len-(textbox.value.length-start));
r.moveStart('character',start);
r.select();
}
catch(e)
{//alert(e.description)}
}
function insertAtCaret(textbox,text)
{
textbox.focus();
document.selection.createRange().text = text;
}
//頁內(nèi)查找
function findInPage(str)
{
var txt, i, found,n = 0;
if (str == "")
{
return false;
}
txt = document.body.createTextRange();
for (i = 0; i <= n && (found = txt.findText(str)) != false; i++)
{
txt.moveStart("character", 1);
txt.moveEnd("textedit");
}
if (found)
{
txt.moveStart("character", -1);
txt.findText(str);
txt.select();
txt.scrollIntoView();
n++;
}
else
{
if (n > 0)
{
n = 0;
findInPage(str);
}
else
{
alert(str + "... 您要找的文字不存在。\n \n請?jiān)囍斎腠撁嬷械年P(guān)鍵字再次查找!");
}
}
return false;
}
//書
<script language="javascript">
function jStartExcel() {
var xls = new ActiveXObject ( "Excel.Application" );
xls.visible = true;
var newBook = xls.Workbooks.Add;
newBook.Worksheets.Add;
newBook.Worksheets(1).Activate;
xls.ActiveWorkBook.ActiveSheet.PageSetup.Orientation = 2;
xls.ActiveWorkBook.ActiveSheet.PageSetup.PaperSize = 5;
newBook.Worksheets(1).Columns("A").columnwidth=50;
newBook.Worksheets(1).Columns("A").WrapText = true;
newBook.Worksheets(1).Columns("B").columnwidth=50;
newBook.Worksheets(1).Columns("B").WrapText = true;
newBook.Worksheets(1).Range("A1:B1000").NumberFormat = "0";
newBook.Worksheets(1).Range("A1:B1000").HorizontalAlignment = -4131;
newBook.Worksheets(1).Cells(1,1).Interior.ColorIndex="15";
newBook.Worksheets(1).Cells(1,1).value="First Column, First Cell";
newBook.Worksheets(1).Cells(2,1).value="First Column, Second Cell";
newBook.Worksheets(1).Cells(1,2).value="Second Column, First Cell";
newBook.Worksheets(1).Cells(2,2).value="Second Column, Second Cell";
newBook.Worksheets(1).Name="My First WorkSheet";
}
</script>
//自定義提示條
<a href="#" title="這是提示">tip</a>
<script Language="JavaScript">
//***********默認(rèn)設(shè)置定義.*********************
tPopWait=50;//停留tWait豪秒后顯示提示。
tPopShow=5000;//顯示tShow豪秒后關(guān)閉提示
showPopStep=20;
popOpacity=99;
//***************內(nèi)部變量定義*****************
sPop=null;
curShow=null;
tFadeOut=null;
tFadeIn=null;
tFadeWaiting=null;
document.write("<style type='text/css'id='defaultPopStyle'>");
document.write(".cPopText { background-color: #F8F8F5;color:#000000; border: 1px #000000 solid;font-color: font-size: 12px; padding-right: 4px; padding-left: 4px; height: 20px; padding-top: 2px; padding-bottom: 2px; filter: Alpha(Opacity=0)}");
document.write("</style>");
document.write("<div id='dypopLayer' style='position:absolute;z-index:1000;' class='cPopText'></div>");
function showPopupText(){
var o=event.srcElement;
MouseX=event.x;
MouseY=event.y;
if(o.alt!=null && o.alt!=""){o.dypop=o.alt;o.alt=""};
if(o.title!=null && o.title!=""){o.dypop=o.title;o.title=""};
if(o.dypop!=sPop) {
sPop=o.dypop;
clearTimeout(curShow);
clearTimeout(tFadeOut);
clearTimeout(tFadeIn);
clearTimeout(tFadeWaiting);
if(sPop==null || sPop=="") {
dypopLayer.innerHTML="";
dypopLayer.style.filter="Alpha()";
dypopLayer.filters.Alpha.opacity=0;
}
else {
if(o.dyclass!=null) popStyle=o.dyclass
else popStyle="cPopText";
curShow=setTimeout("showIt()",tPopWait);
}
}
}
function showIt(){
dypopLayer.className=popStyle;
dypopLayer.innerHTML=sPop;
popWidth=dypopLayer.clientWidth;
popHeight=dypopLayer.clientHeight;
if(MouseX+12+popWidth>document.body.clientWidth) popLeftAdjust=-popWidth-24
else popLeftAdjust=0;
if(MouseY+12+popHeight>document.body.clientHeight) popTopAdjust=-popHeight-24
else popTopAdjust=0;
dypopLayer.style.left=MouseX+12+document.body.scrollLeft+popLeftAdjust;
dypopLayer.style.top=MouseY+12+document.body.scrollTop+popTopAdjust;
dypopLayer.style.filter="Alpha(Opacity=0)";
fadeOut();
}
function fadeOut(){
if(dypopLayer.filters.Alpha.opacity<popOpacity) {
dypopLayer.filters.Alpha.opacity+=showPopStep;
tFadeOut=setTimeout("fadeOut()",1);
}
else {
dypopLayer.filters.Alpha.opacity=popOpacity;
tFadeWaiting=setTimeout("fadeIn()",tPopShow);
}
}
function fadeIn(){
if(dypopLayer.filters.Alpha.opacity>0) {
dypopLayer.filters.Alpha.opacity-=1;
tFadeIn=setTimeout("fadeIn()",1);
}
}
document.onmouseover=showPopupText;
</script>
//插入文字
document.onclick =function(){
var oSource = window.event.srcElement;
if(oSource.tagName!="DIV")
return false;
var sel = document.selection;
if (sel!=null) {
var rng = sel.createRange();
if (rng!=null)
rng.pasteHTML("<font color=red>插入文字</font>");
}
}
//netscapte下操作xml
//判斷鍵值
//禁止FSO
1.注銷組件
regsvr32 /u scrrun.dll
2.修改PROGID
HKEY_CLASSES_ROOT\Scripting.FileSystemObject
Scripting.FileSystemObject
3.對于使用object的用戶,修改HKEY_CLASSES_ROOT\Scripting.
//省略號
//檢測media play版本
//圖象按比例
//細(xì)線SELECT
function getComputerName()
{
var objWMIService = GetObject("Winmgmts:root\cimv2");
for(e = new Enumerator(objWMIService) ; !e.atEnd() ; e.moveNext())
{
var getComputer = e.item();
return getComputer.Name;
}
}
//條件編譯
<SCRIPT LANGUAGE="JavaScript">
<!--
var xmlDoc = new ActiveXObject("Msxml2.DOMDocument.4.0");
var currNode;
xmlDoc.async = false;
xmlDoc.async = false;
xmlDoc.loadXML("<TABLENAME> 你好你阿三 大法 司法等四 </TABLENAME>");
currNode = xmlDoc.documentElement;
var s = currNode.xml;
var r = /\<([^\>\s]*?)[^\>]*?\>([^\<]*?)\<\/\1\>/
var b = s.replace(r,"$2");
alert(b);
//-->
</SCRIPT>
//mergeAttributes 復(fù)制所有讀/寫標(biāo)簽屬性到指定元素。
<SCRIPT>
function fnMerge(){
oSource.children[1].mergeAttributes(oSource.children[0]);
}
</SCRIPT>
<SPAN ID=oSource>
<DIV
ID="oDiv"
ATTRIBUTE1="true"
ATTRIBUTE2="true"
onclick="alert('click');"
onmouseover="this.style.color='#0000FF';"
onmouseout="this.style.color='#000000';"
>
This is a sample <B>DIV</B> element.
</DIV>
<DIV ID="oDiv2">
This is another sample <B>DIV</B> element.
</DIV>
</SPAN>
<INPUT
TYPE="button"
VALUE="Merge Attributes"
onclick="fnMerge()"
>
以上內(nèi)容可以隨意轉(zhuǎn)載,轉(zhuǎn)載后請注名來源和出處! 出處是 http://ttyp.cnblogs.com/
下一篇是 JavaScript[對象.屬性]集錦
<script language=javascript>
/*@cc_on @*/
/*@if (@_win32 && @_jscript_version>5)
function window.confirm(str)
{
execScript("n = msgbox('"+ str +"', 257)", "vbscript");
return(n == 1);
}
@end @*/
</script>
//取得innerText
<span style="border:1px solid #000000; position:absolute; overflow:hidden;" >
<select style="margin:-2px;">
<option>1111</option>
<option>11111111111111</option>
<option>111111111</option>
</select></span>
//Import
function Import() {
for( var i=0; i<arguments.length; i++ ) {
var file = arguments[i];
if ( file.match(/\.js$/i))
document.write('<script type=\"text/javascript\" src=\"' + file + '\"></sc' + 'ript>');
else
document.write('<style type=\"text/css\">@import \"' + file + '\" ;</style>');
}
};
//js枚舉
<script language="JavaScript">
<!--
//圖片按比例縮放
var flag=false;
function DrawImage(ImgD){
var image=new Image();
var iwidth = 80; //定義允許圖片寬度
var iheight = 80; //定義允許圖片高度
image.src=ImgD.src;
if(image.width>0 && image.height>0){
flag=true;
if(image.width/image.height>= iwidth/iheight){
if(image.width>iwidth){
ImgD.width=iwidth;
ImgD.height=(image.height*iwidth)/image.width;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
ImgD.alt=image.width+"×"+image.height;
}
else{
if(image.height>iheight){
ImgD.height=iheight;
ImgD.width=(image.width*iheight)/image.height;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
ImgD.alt=image.width+"×"+image.height;
}
}
}
//-->
</script>
<img src=".." onload = "DrawImage(this)">
<IE:clientCaps ID="oClientCaps" style="{behavior:url(#default#clientcaps)}" />
<SCRIPT>
var flash="";
WMPVersion= oClientCaps.getComponentVersion("{22D6F312-B0F6-11D0-94AB-0080C74C7E95}","ComponentID");
if (WMPVersion != "") {
flash = "";
var version = WMPVersion.split(",");
var i;
for (i = 0; i < version.length; i++) {
if (i != 0)
flash += ".";
flash += version[i];
}
document.write("您的Windows Media Player 版本是:"+flash+"<p>");
}
</SCRIPT>
<DIV STYLE="width: 120px; height: 50px; border: 1px solid blue;
overflow: hidden; text-overflow:ellipsis">
<NOBR>就是比如有一行文字,很長,表格內(nèi)一行顯示不下.</NOBR>
</DIV>
<html>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<head>
<script language="javascript">
var ie =navigator.appName=="Microsoft Internet Explorer"?true:false;
function keyDown(e)
{
if(!ie)
{
var nkey=e.which;
var iekey='現(xiàn)在是ns瀏覽器';
var realkey=String.fromCharCode(e.which);
}
if(ie)
{
var iekey=event.keyCode;
var nkey='現(xiàn)在是ie瀏覽器';
var realkey=String.fromCharCode(event.keyCode);
if(event.keyCode==32){realkey='\' 空格\''}
if(event.keyCode==13){realkey='\' 回車\''}
if(event.keyCode==27){realkey='\' Esc\''}
if(event.keyCode==16){realkey='\' Shift\''}
if(event.keyCode==17){realkey='\' Ctrl\''}
if(event.keyCode==18){realkey='\' Alt\''}
}
alert('ns瀏覽器中鍵值:'+nkey+'\n'+'ie瀏覽器中鍵值:'+iekey+'\n'+'實(shí)際鍵為'+realkey);
}
document.onkeydown = keyDown;
</script>
</head>
<body>
//Javascript Document.
<hr>
<center>
<h3>請按任意一個(gè)鍵。。。。</h3>
</center>
</body>
</html>
doc = new ActiveXObject("Msxml2.DOMDocument");
doc = new ActiveXObject("Microsoft.XMLDOM")
->>
doc = (new DOMParser()).parseFromString(sXML,'text/xml')
<input type=text name=re_name style="width:100px;height:21px;font-size:10pt;"><span style="width:18px;border:0px solid red;"><select name="r00" style="margin-left:-100px;width:118px; background-color:#FFEEEE;" onChange="document.all.re_name.value=this.value;">
<option value="1">11111111<option>
<option value="2">222222</option>
<option value="3">333333</option>
</select>
</span>
<SCRIPT language="VBScript">
Function URLEncoding(vstrIn)
strReturn = ""
For i = 1 To Len(vstrIn)
ThisChr = Mid(vStrIn,i,1)
If Abs(Asc(ThisChr)) < &HFF Then
strReturn = strReturn & ThisChr
Else
innerCode = Asc(ThisChr)
If innerCode < 0 Then
innerCode = innerCode + &H10000
End If
Hight8 = (innerCode And &HFF00)\ &HFF
Low8 = innerCode And &HFF
strReturn = strReturn & "%" & Hex(Hight8) & "%" & Hex(Low8)
End If
Next
URLEncoding = strReturn
End Function
Function bytes2BSTR(vIn)
strReturn = ""
For i = 1 To LenB(vIn)
ThisCharCode = AscB(MidB(vIn,i,1))
If ThisCharCode < &H80 Then
strReturn = strReturn & Chr(ThisCharCode)
Else
NextCharCode = AscB(MidB(vIn,i+1,1))
strReturn = strReturn & Chr(CLng(ThisCharCode) * &H100 + CInt(NextCharCode))
i = i + 1
End If
Next
bytes2BSTR = strReturn
End Function
dim strA,oReq
strA = URLEncoding("submit1=Submit&text1=中文")
set oReq = CreateObject("MSXML2.XMLHTTP")
oReq.open "POST","http://ServerName/VDir/TstResult.asp",false
oReq.setRequestHeader "Content-Length",Len(strA)
oReq.setRequestHeader "CONTENT-TYPE","application/x-www-form-urlencoded"
oReq.send strA
msgbox bytes2BSTR(oReq.responseBody)
</SCRIPT>
//readyState是xmlhttp返回?cái)?shù)據(jù)的進(jìn)度,0=載入中,1=未初始化,2=已載入,3=運(yùn)行中,4=完成
(1)拖拽訪問
event.dataTransfer.setData("URL", oImage.src);
sImageURL = event.dataTransfer.getData("URL")
(2)普通訪問
window.clipboardData.setData("Text",oSource.innerText);
window.clipboardData.getData("Text");
<HTML>
<HEAD>
<META NAME="save" CONTENT="history">
<STYLE>
.sHistory {behavior:url(#default#savehistory);}
</STYLE>
</HEAD>
<BODY>
<INPUT class=sHistory type=text id=oPersistInput>
</BODY>
</HTML>
function modelessAlert(Msg)
{
window.showModelessDialog("javascript:alert(\""+escape(Msg)+"\");window.close();","","status:no;resizable:no;help:no;dialogHeight:height:30px;dialogHeight:40px;");
}
<p style="page-break-after:always">page1</p>
<p style="page-break-after:always">page2</p>
<meta name="ROBOTS" content="屬性值">
其中屬性值有以下一些:
屬性值為"all": 文件將被檢索,且頁上鏈接可被查詢;
屬性值為"none": 文件不被檢索,而且不查詢頁上的鏈接;
屬性值為"index": 文件將被檢索;
屬性值為"follow": 查詢頁上的鏈接;
屬性值為"noindex": 文件不檢索,但可被查詢鏈接;
屬性值為"nofollow":
<object id=min classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">
<param name="Command" value="Minimize"></object>
<object id=max classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">
<param name="Command" value="Maximize"></object>
<OBJECT id=close classid="clsid:adb880a6-d8ff-11cf-9377-00aa003b7a11">
<PARAM NAME="Command" value="Close"></OBJECT>
<input type=button value=最小化 onclick=min.Click()>
<input type=button value=最大化 onclick=max.Click()>
<input type=button value=關(guān)閉 onclick=close.Click()>
<IMG SRC="mypicture.jpg" HEIGHT="100px" WIDTH="100px" GALLERYIMG="false">
or
<head>
<meta http-equiv="imagetoolbar" content="no">
</head>
<META HTTP-EQUIV="pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate">
<META HTTP-EQUIV="expires" CONTENT="0">
<input type=button value=導(dǎo)入收藏夾 onclick="window.external.ImportExportFavorites(true,'http://localhost');">
<input type=button value=導(dǎo)出收藏夾 onclick="window.external.ImportExportFavorites(false,'http://localhost');">
<input type=button value=整理收藏夾 onclick="window.external.ShowBrowserUI('OrganizeFavorites', null)">
<input type=button value=語言設(shè)置 onclick="window.external.ShowBrowserUI('LanguageDialog', null)">
<input type=button value=加入收藏夾 onclick="window.external.AddFavorite('http://www.google.com/', 'google')">
<input type=button value=加入到頻道 onclick="window.external.addChannel('http://www.google.com/')">
<input type=button value=加入到頻道 onclick="window.external.showBrowserUI('PrivacySettings',null)">
<input type=text onkeypress="return event.keyCode>=48&&event.keyCode<=57||(this.value.indexOf('.')<0?event.keyCode==46:false)" onpaste="return !clipboardData.getData('text').match(/\D/)" ondragenter="return false">
SCRIPT 標(biāo)記
用于包含javascript代碼.
語法
屬性
LANGUAGE 定義腳本語言
SRC 定義一個(gè)URL用以指定以.JS結(jié)尾的文件
windows對象
每個(gè)HTML文檔的頂層對象.
屬性
frames[] 子楨數(shù)組.每個(gè)子楨數(shù)組按源文檔中定義的順序存放.
feames.length 子楨個(gè)數(shù).
self 當(dāng)前窗口.
parent 父窗口(當(dāng)前窗口是中一個(gè)子窗口).
top 頂層窗口(是所有可見窗口的父窗口).
status 瀏覽器狀態(tài)窗口上的消息.
defaultStatus 當(dāng)status無效時(shí),出現(xiàn)在瀏覽器狀態(tài)窗口上的缺省消息.
name 內(nèi)部名,為由window.open()方法打開的窗口定義的名字.
方法
alert("message") 顯示含有給定消息的"javascript Alert"對話框.
confirm("message") 顯示含有給定消息的"Confirm"對話框(有一個(gè)OK按鈕和一個(gè)Cancel按鈕).如果用戶單擊OK返回true,否則返回false.
prompt("message") 顯示一個(gè)"prompt"對話框,要求用戶根據(jù)顯示消息給予相應(yīng)輸入.
open("URL","name") 打開一個(gè)新窗口,給予一個(gè)指定的名字.
close() 關(guān)閉當(dāng)前窗口.
frame對象
它是整個(gè)瀏覽器窗口的子窗口,除了status,defaultStatus,name屬性外,它擁有window對象的全部屬性.
location對象
含有當(dāng)前URL的信息.
屬性
href 整個(gè)URL字符串.
protocol 含有URL第一部分的字符串,如http:
host 包含有URL中主機(jī)名:端口號部分的字符串.如//www.cenpok.net/server/
hostname 包含URL中主機(jī)名的字符串.如http://www.cenpok.net
port 包含URL中可能存在的端口號字符串.
pathname URL中"/"以后的部分.如~list/index.htm
hash "#"號(CGI參數(shù))之后的字符串.
search "?"號(CGI參數(shù))之后的字符串.
document對象
含有當(dāng)前文檔信息的對象.
屬性
title 當(dāng)前文檔標(biāo)題,如果未定義,則包含"Untitled".
location 文檔的全URL.
lastModified 含有文檔最后修改日期.
referrer 調(diào)用者URL,即用戶是從哪個(gè)URL鏈接到當(dāng)前頁面的.
bgColor 背景色(#xxxxxx)
fgColor 前景文本顏色.
linkColor 超鏈接顏色.
vlinkColor 訪問過的超鏈顏色.
alinkColor 激活鏈顏色(鼠標(biāo)按住未放時(shí)).
forms[] 文檔中form對象的數(shù)組,按定義次序存儲.
forms.length 文檔中的form對象數(shù)目.
links[] 與文檔中所有HREF鏈對應(yīng)的數(shù)組對象,按次序定義存儲.
links.length 文檔中HREF鏈的數(shù)目.
anchors[] 錨(...)數(shù)組,按次序定義存儲.
anchors.length 文檔中錨的數(shù)目.
方法
write("string") 將字符串突出給當(dāng)前窗口.(字符串可以含有HTML標(biāo)記)
writeln("string") 與write()類似,在結(jié)尾追加回車符,只在預(yù)定格式文本中(
...
或
...
)生效.
clear() 清當(dāng)前窗口.
close() 關(guān)閉當(dāng)前窗口.
form對象
屬性
name
中的NAME屬性的字符串值.
method 中METHOD屬性的類值,"0"="GET" ,"1"="POST" .
action 中ACTION屬性的字符串值.
target 表格數(shù)據(jù)提交的目標(biāo),與標(biāo)記中相應(yīng)屬性一致.
elements[index] elements屬性包含form中的各個(gè)元素.
length 表格中的元素個(gè)數(shù).
方法
submit() 提交表格.
事件處理器onSubmit() 用戶單擊一個(gè)定義好的按鈕提交form時(shí)運(yùn)行的代碼.
text和textarea對象
屬性
name NAME屬性的字符串值.
value 域內(nèi)容的字符串值.
defaultValue 域內(nèi)容的初始字符串值.
方法
focus() 設(shè)置對象輸入焦點(diǎn).
blur() 從對象上移走輸入焦點(diǎn).
select() 選定對象的輸入?yún)^(qū)域.
事件處理器
onFocus 當(dāng)輸入焦點(diǎn)進(jìn)入時(shí)執(zhí)行.
onBlur 當(dāng)域失去焦點(diǎn)時(shí)執(zhí)行.
onSelect 當(dāng)域中有部分文本被選定時(shí)執(zhí)行.
onChange 當(dāng)域失去焦點(diǎn)且域值相對于onFocus執(zhí)行有所改變時(shí)執(zhí)行.
復(fù)選框(checkbox)對象
屬性
name NAME屬性的字符串值.
value 復(fù)選框內(nèi)容的字符串值.如果設(shè)置了,則為"on",否則為"off".
checked 復(fù)選框內(nèi)容的布爾值.如果設(shè)置了,則為true,否則為false .
defaultChecked 反映(CHECKED)屬性的布爾值(缺省狀態(tài)).
方法
click() 選定復(fù)選框,并使之狀態(tài)為"on".
事件處理器
onClick 當(dāng)用戶單擊Checkbox時(shí)執(zhí)行.
單選按鈕(radio)對象
屬性
name NAME屬性的字符串值.
length radio對象中單選按鈕的個(gè)數(shù).
value VALUE屬性的字符串值.
checked 布爾值,按下為true,否則為false .
defaultChecked 反映CHECKED屬性值的布爾值.
方法
click() 選定單選按鈕.
事件處理器
onClick 當(dāng)單選按鈕被選定時(shí)執(zhí)行.
select對象
屬性
length select對象中對象的個(gè)數(shù).
name 由NAME=屬性定義的select對象的內(nèi)部名.
selectedIndex select對象中當(dāng)前被選option的下標(biāo).
options 該屬性對應(yīng)于在HTML中定義select對象時(shí)標(biāo)記中的內(nèi)容,它有如下屬性:
text 標(biāo)記后的文本串.
value VALUE屬性的值,當(dāng)Submit按鈕被按下時(shí),該值被提交.
defaultSelected 反映標(biāo)記的SELECTED屬性的布爾值.
selected 反映option的當(dāng)前選擇狀態(tài)的布爾值.
事件處理器
onFocus 當(dāng)輸入焦點(diǎn)進(jìn)入域時(shí)執(zhí)行.
onBlur 當(dāng)域失去輸入焦點(diǎn)時(shí)執(zhí)行.
onChange 當(dāng)域失去焦點(diǎn)且如果域的值相對于onFocus執(zhí)行時(shí)有所改變,則執(zhí)行onChange.
Button對象
表格中有三種類型按鈕,由標(biāo)記中的TYPE屬性定義:
.submit (type="SUBMIT")
.reset (type="RESET")
.custom (type="BUTTON")
所有按鈕對象都有如下成分:
屬性
value VALUE屬性的字符串值.
name NAME屬性的字符串值.
方法
click() 選定按鈕
事件處理器
onClick 當(dāng)按鈕被單擊時(shí)執(zhí)行.
submit和reset對象
屬性
value VALUE=屬性的內(nèi)容.
name NAME=屬性的內(nèi)容.
方法
click() 選定按鈕
事件處理器
onClick 當(dāng)按鈕被單擊時(shí)執(zhí)行.
password對象
屬性
defaultValue VALUE=屬性的內(nèi)容.
name NAME=屬性的內(nèi)容.
value 目前輸入password域的數(shù)據(jù).
方法
focus() 將焦點(diǎn)帶入password域.
blur 將焦點(diǎn)從password域移出.
select() 選定password域中的當(dāng)前數(shù)據(jù),以備修改.
navigator對象
該對象用于確定用戶訪問時(shí)使用的Navigator版本.
屬性
appCodeName 相對于用戶瀏覽器的"codename"
appName 相對于用戶瀏覽器的實(shí)際名字.
appVersion 相對于用戶瀏覽器的版本號.
userAgent 該屬性反映用戶瀏覽器的全部信息.
string對象
string對象為操作字符串的內(nèi)容提供了很多方法.
屬性
length 字符串的長度,即字符串中字符的個(gè)數(shù).
方法
big(),blink(),bold(),fixed(),italics(),small(),sub(),strike(),sup(),fontColor(color),fontSize(size)
以上方法為字符串增加相應(yīng)的HTML標(biāo)記.
charAt(index) 返回字符串中index處的字符.
indexOf(searchValue,[fromIndex]) 該方法在字符串中尋找第一次出現(xiàn)的searchValue.如果給定了fromIndex,則從
字符串內(nèi)該位置開始搜索,當(dāng)searchValue找到后,返回該串第一個(gè)字符的位置.
lastIndexOf(searchValue,[fromIndex]) 從字符串的尾部向前搜索searchValue,并報(bào)告找到的第一個(gè)實(shí)例.
substring(indexA,indexB) 獲取自indexA到indexB的子串.
toLowerCase(),toUpperCase() 將字符串中所有字符全部轉(zhuǎn)換成大寫,小寫.
Date對象
要使用Date對象,必須先生成一個(gè)Date實(shí)例:
變量名=new Date();
方法
getDay(),getDate(),getHours(),getMinutes(),getMonth(),getSeconds(),getTime(),
getTimeZoneOffset(),getYear()
還有setDay... ...
toGMTString() 用GMT格式返回當(dāng)前時(shí)間. (Sun,12 Feb 1999 14:19:22 GMT)
toLocaleString 用locale格式返回當(dāng)前時(shí)間. (03/11/99 14:19:22)
parse(date) 將普通date字符串轉(zhuǎn)換成豪秒形式,從而給setTime()做參數(shù).
Math對象
屬性
LN10 (10的自然對數(shù))
PI (3.1415926...)
SQRT1_2 (1/2的平方根)
方法
abs(x) 返回x的絕對值
acos(x) 返回x的arc cosine值
asin(x) 返回x的arc sin值
atan(x) 返回x的arc tangent值
ceil(x) 返回大于等于x的最小整數(shù)
cos(x) 返回x的cosine值
exp(x) 返回e的x次方
floor(x) 返回小于等于x的最大整數(shù)
log(x) 返回x的
max(x,y) 返回x,y中的大值
min(x,y) 返回x,y中的小值
pow(x,y) 返回x的y次方
round(x) 舍入到最近整數(shù),(小于或等于0.5小數(shù)舍去)
sin(x) 返回x的sin值
sqrt(x) 返回x的平方根
tan(x) 返回x的tangent值