function getURLVar(urlVarName) {
   var urlHalves = String(document.location).toLowerCase().split('?');
   var urlVarValue = '';
   if(urlHalves[1]){
      var urlVars = urlHalves[1].split('&');
      for(var i=0; i<=(urlVars.length); i++){
         if(urlVars[i]){
            var urlVarPair = urlVars[i].split('=');
            if (urlVarPair[0] && urlVarPair[0] == urlVarName.toLowerCase()) {
               urlVarValue = urlVarPair[1];
            }
         }
      }
   }
   return urlVarValue;
}