js gets the parameters in the url (garbled characters have been resolved)

function GetQueryString(name)
{
     var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)", "i");
     var r =  window.location.search.substr(1).match(reg); 
     if (r != null) return decodeURIComponent(r[2]); return null; 
}