function getURLParam(strParamName) {
  var strReturn = ""; var strHref = window.location.href;
  if ( strHref.indexOf("?") > -1 ) {
    var strQueryString = strHref.substr(strHref.indexOf("?")).toLowerCase(); var aQueryString = strQueryString.split("&");
    for ( var iParam = 0; iParam < aQueryString.length; iParam++ ) {
      if ( aQueryString[iParam].indexOf(strParamName.toLowerCase() + "=") > -1 ) {
        var aParam = aQueryString[iParam].split("="); strReturn = aParam[1]; break;
      }
    }
  }
  return unescape(strReturn);
}