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CSS code:
li:hover ul, li.over ul { //[color=#FF6600] £¿ÕâÊÇʲôÒâ˼[/color]
display: block; //ÎÒÖªµÀÕâÊÇÏÔʾ¿éÐÅÏ¢
}

JScript code:
<script type="text/javascript"><!--//--><![CDATA[//><!--
startList = function() {
if (document.all&&document.getElementById) {
navRoot = document.getElementById("nav");
for (i=0; i<navRoot.childNodes.length; i++) {
node = navRoot.childNodes[i];
if (node.nodeName=="LI") {
node.onmouseover=function() {
this.className+=" over"; // [color=#FF9900]£¿ÕâÊÇʲôÒâ˼[/color] }
node.onmouseout=function() {
this.className=this.className.replace(" over", ""); // [color=#FF0000]ÕâÊÇʲôÒâ˼[/color] }
}
}
}
}
window.onload=startList;

//--><!]]></script>

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this.className+=" over"; µÈ¼ÛÓÚ this.className=this.className+" over";
¸øclassNameÁ¬½Ó×Ö·û´®¡° over¡±


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        {
            if (!IsPostBack)
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HTML code:
<html>
<head>
<meta http-equiv= ......

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var str="reguser_do.asp?psw_value="+obj.value+"&regid_value="+obj.id+"&ac_name="+ajax

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