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 + "=") > -1 ){

                      var aParam = aQueryString[iParam].split("=");

                      strReturn = aParam[1];

                      break;

                }

        }

    }

return strReturn;

}