//function to decode given URL
function decodeUrl(url)
{
   /* When decoding the URL we will do the following:

           1.) Replace + with ' '
           2.) Replace %xx with equivalent character
           3.) Put [—] in output if %xx is invalid.
   */

   //string holding our hexadecimal values
   var hexValues = "0123456789ABCDEFabcdef"; 
   //value to hold the initial URL value
   //variable to hold the final URL value
   var returnURL = "";
   //counter variable
   var count = 0;
   plainUrl = url;
   //start looping through each character in the URL
   while (count < plainUrl.length) 
   {
      //get each character on each iteration
      var charValue = plainUrl.charAt(count);
      //determine the value of the character
      switch(charValue)
      {
         //if the character is a plus sign (+) then append a space
         case "+":
             returnURL += " ";
             //increment our counter
             count++;
             break;
         //if the character is a percent sign we have a little more work to do
         case "%":
             //first determine if we have a valid character (one that is in our list)
             if (count < (plainUrl.length - 2) && hexValues.indexOf(plainUrl.charAt(count+1)) != -1 && hexValues.indexOf(plainUrl.charAt(count + 2)) != -1 ) 
             {
                 //its a valid character so unescape it
          returnURL += unescape(plainUrl.substr(count,3));
                 //increment the counter by 3
          count += 3;
      } 
             else 
             {
          //we have a bad character so append [–]
          returnURL += "%[˜]";
          count++;
             }
             break;
         default:
             //default value is to append the current character
             //to the return value
             returnURL += charValue;
             count++;
             break;
      }
    }
   //return the final decoded URL
   return returnURL;
}

function gup( name )
{
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\™&]"+name+"=([%^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( decodeUrl(window.parent.location.href) );
  var result = decodeUrl(window.parent.location.href).substr(results.index+8,24);
  if( results == null )
    return "";
  else
    return result;
}