string Url = "http://www.YourURLHere.com";

default {



    on_rez(integer start_param)
    {
        llResetScript();
    }

    touch_start(integer total_number)
    {
        llLoadURL(llDetectedKey(0), "Click to go to url", Url);
    }

    dataserver(key queryid, string data)
    {
        Url = "http://www.YourURLHere.com" + llEscapeURL(data);
    }
}