JS获取URL参数

<script language="javascript">
var str=window.location.href;
var es=/keyword=/;
es.exec(str);
var right=RegExp.rightContext;
document.write(right);

</script>

var url=parent.location.search;
var Request = new Object();
if(url.indexOf("?")!=-1)
{
var str = url.substr(1)
strs = str.split("&");
for(var i=0;i<strs.length;i++)
{
Request[strs[i].split("=")[0]]=unescape(strs[i].split("=")[1]);
}
}