function getValue(str,URL)
{
if (URL.indexOf(str+"=") != -1) {
  theleft = URL.indexOf(str+"=") + str.length + 1;
  theright = URL.indexOf("&",theleft);
  if (theright != theleft) {
    if (theright < theleft) {theright = URL.length}
    displayString = new String(URL.substring(theleft, theright));
    displayString = displayString.replace(/%20/g," ");
    displayString = displayString.replace(/%26/g,"&");
    return (displayString);
    }
  }
}

function popUpwin(URL, winwidth, winheight){
  var extwin = window.open(URL,'newWin','toolbar=0,location=0,menubar=0,status=0,resizable=1,scrollbars=1,width='+winwidth+',height='+winheight);
  extwin.focus();
 }
 

   var keyStr = "ABCDEFGHIJKLMNOP" +
                "QRSTUVWXYZabcdef" +
                "ghijklmnopqrstuv" +
                "wxyz0123456789+/" +
                "=";

    function decode64(input) {
      var output = "";
      var chr1, chr2, chr3 = "";
      var enc1, enc2, enc3, enc4 = "";
      var i = 0;

      // remove all characters that are not A-Z, a-z, 0-9, +, /, or =
      var base64test = /[^A-Za-z0-9\+\/\=]/g;
      if (base64test.exec(input)) {
         alert("There were invalid base64 characters in the input text.\n" +
               "Valid base64 characters are A-Z, a-z, 0-9, '+', '/', and '='\n" +
               "Expect errors in decoding.");
      }
      input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

      do {
         enc1 = keyStr.indexOf(input.charAt(i++));
         enc2 = keyStr.indexOf(input.charAt(i++));
         enc3 = keyStr.indexOf(input.charAt(i++));
         enc4 = keyStr.indexOf(input.charAt(i++));

         chr1 = (enc1 << 2) | (enc2 >> 4);
         chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
         chr3 = ((enc3 & 3) << 6) | enc4;

         output = output + String.fromCharCode(chr1);

         if (enc3 != 64) {
            output = output + String.fromCharCode(chr2);
         }
         if (enc4 != 64) {
            output = output + String.fromCharCode(chr3);
         }

         chr1 = chr2 = chr3 = "";
         enc1 = enc2 = enc3 = enc4 = "";

      } while (i < input.length);

      return output;
   }