// Read a page's GET URL variables and return them as an associative array.
function getUrlVars(param){
   
  
    var vars = [], hash;
    var hashes = parent.window.location.search.replace('?', '').split('&'); //parent.window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
    
  

    for(var i = 0; i < hashes.length; i++){
        hash = hashes[i].split('=');
        vars.push(hash[0]);
        vars[hash[0]] = hash[1];
    }
        
  
    return vars[param];
}