Redirect based on search string

How does it work?

[Bobby]

I have a script which redirects to another page based on who the referral comes from, but I need to modify it or write one which redirects to different pages based on search string.

Here is the original redirect script:

<!-- Begin
var refarray = new Array();
refarray['somedomain.com'] = "http://www.anotherdomain.com/index.htm";
for (var i in refarray) {
if (document.referrer.indexOf(i)!= -1) window.location.replace(refarray[i]);
}
// End -->

What I'd like to do is redirect to page1.htm for searches with "bobby" in the search string and redirect to page2.htm for searches with "billy".

Is there a simple way to do it which happens quickly and does not cause much of a delay?

[isitreal]

If you want an instant redirect you might think about using php, have the php redirecting code occur first thing on the page, the logic is pretty much the same, I assume you can do it with ASP too.