<script>
var str="abc.htm?para=123¶2=456"
function QuerryString(locate,para){
var qstr=new Array()
var matchstr;
var paras=locate.match(/([\w@]+)=(\w+)\b/g)
for(i=0;i<paras.length;i++){
qstr[i]=paras[i].split("=")[0]
paras[i]=paras[i].split("=")[1]
if(qstr[i]==para)
matchstr=paras[i]
}
return matchstr
}
alert(QuerryString(str,"para"))
alert(QuerryString(str,"para2"))
</script>