<script language="JavaScript">
<!--
function Request(strName)
{
var strHref=http://www.?subject=1001&channel=1200&module=3002;
var intPos = strHref.indexOf("?");
var strRight = strHref.substr(intPos + 1);

var arrTmp = strRight.split("&");
for(var i = 0; i < arrTmp.length; i++)
{
var arrTemp = arrTmp[i].split("=");

if(arrTemp[0].toUpperCase() == strName.toUpperCase()) return arrTemp[1];
}
return "";
}

alert(Request("a"));
alert(Request("b"));
alert(Request("c"));
//-->
</script>

<script>
String.prototype.getQuery = function(name)
{
　　var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");
　　var r = this.substr(this.indexOf("\?")+1).match(reg);
　　if (r!=null) return unescape(r[2]); return null;
}
var str =http://www.?subject=1001&channel=1200&module=3002;
alert(str.getQuery("subject"));
alert(str.getQuery("channel"));
alert(str.getQuery("module"));
</script>