/*
  check for vaild email
*/
  function checkEmail(anId) {
    var e = document.getElementById(anId);
    var ok = false;
    if (e != null) {
      if (e.value.indexOf(".") != -1 && e.value.indexOf("@") != -1) {
        ok =  true;
      }
    }
    return ok;
  }
  
/*
  Ajax object
*/  
  function GetXmlHttpObject()
  {
    var xmlHttp=null;
    try {
      // Firefox, Opera 8.0+, Safari, non IE
      xmlHttp=new XMLHttpRequest();
    } catch (e) {
      // Internet Explorer  6+
      try
      {
        xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
      } catch (e) {
        try { // IE 5
          xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
        } catch (e) { // NO AJAX
          alert("Your browser does not support XMLHTTP.")
        }
      }
    }
    return xmlHttp;
  }