代碼網上找到的，不能用，也有可能是用法不對，做了一些修改，但還是不能通用，有時間了再說。
function printFrame(frame) {
?if (printIsNativeSupport())
??window.print2 = window.print;
?window.print = printFrame;
?
?if (this.parent.document.frames(frame).document.readyState !== "complete" ){
??return;
?}
?if ( window.print2 ){ // IE5
??var focused = document.activeElement;
??this.parent.document.frames(frame).focus();
??if (this.parent.document.frames(frame).print2)
???this.parent.document.frames(frame).print2();
??else
???this.parent.document.frames(frame).print();
??return;
?}
?var eventScope = printGetEventScope(this.parent.document.frames(frame));
?var focused = document.activeElement;
?window.printHelper = function() {
??execScript("on error resume next: printWB.ExecWB 6, 1", "VBScript");
??printFireEvent(this.parent.document.frames(frame), eventScope, "onafterprint");
??printWB.outerHTML = "";
??window.printHelper = null;
?}
?document.body.insertAdjacentHTML("beforeEnd","<object id=\"printWB\" width=0 height=0 \classid=\"clsid:8856F961-340A-11D0-A96B-00C04FD705A2\"></object>");
?printFireEvent(this.parent.document.frames(frame), eventScope, "onbeforeprint");
?this.parent.document.frames(frame).focus();
?window.printHelper = printHelper;
?setTimeout("window.printHelper()", 0);
}
// helpers
function printIsNativeSupport() {
?var agent = window.navigator.userAgent;
?var i = agent.indexOf("MSIE ")+5;
?return parseInt(agent.substr(i)) >= 5 && agent.indexOf("5.0b1") < 0;
}
function printFireEvent(frame, obj, name) {
?var handler = obj[name];
?switch ( typeof(handler) ) {
??case "string": frame.execScript(handler); break;
??case "function": handler();
?}
}
function printGetEventScope(frame) {
?var frameset = frame.document.all.tags("FRAMESET");
?if ( frameset.length ) return frameset[0];
??return frame.document.body;
}