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 
    }



function LoadIframe(){

var pu = getURLParam("url")
if (pu=="") pu="firstpage.html"
frames['MainIFrame'].location.href=pu;
}