<DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "<html xmlns="<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Untitled Document</title>
<SCRIPT language=javascript1.3><!--
var testleng=30;//允許多少字符串填入
function GC_UpdateCharCount() {
? var desc_el = document.getElementById('desc');
? var remainingchars_el = document.getElementById('remainingchars');
? var num_remaining = testleng - desc_el.value.length;
? if (num_remaining >= 0) {
? remainingchars_el.innerHTML = num_remaining;
? document.getElementById('num').style.display = "";
? } else {
? document.getElementById('num').style.display = "none";
? remainingchars_el.innerHTML = "超出的字數: " + "<font color=red>"+
? (-num_remaining + '') + "</font>";
? }
}
function isOver(sText)
??????????? {
??????????????? var intlen=sText.value.length;
??????????????? if (intlen>testleng)
??????????????? {
??????????????????? alert("描述特征的內容的字數必修小于或者等于 "+testleng);
??????????????????? sText.focus();
??????????????????? sText.select();
??????????????? }
??????????? }
//--></SCRIPT>
</head>
<body>
<TEXTAREA id=desc onkeydown=GC_UpdateCharCount() onkeyup=GC_UpdateCharCount()? onblur="isOver(this);" name=desc rows=4 cols=40></TEXTAREA>
??????????? <BR><table><tr><td? id="num">還剩下的字數:</td><td><SPAN id=remainingchars>
??????????? <SCRIPT language=javascript1.2><!--
????????????? GC_UpdateCharCount();
????????????? //--></SCRIPT></SPAN></td></tr></table>
</body>
</html>
posted on 2006-07-24 11:21
fish的Blog 閱讀(320)
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