ajax example with XMLHttpRequest

ajaxing

  var xRequest1;
        if (window.XMLHttpRequest)
        {
            xRequest1 = new XMLHttpRequest();
        } else {
            xRequest1 = new ActiveXObject("Microsoft.XMLHTTP");

        }
          
               //Send the proper header information along with the request

        xRequest1.onreadystatechange = function() {
            if ((xRequest1.readyState == 4) && (xRequest1.status == 200))
            {
                 var respone = xRequest1.responseText;
//                 alert(respone);
                       if( respone.match(/success/g)){
                         window.location="index.jsp";
                       }else{
                           alert(" nott   match");
                       }
                       
               
            }
        };
        var data = "uname=" + encodeURIComponent($("[name='uname']").val())
        + "&upass=" + encodeURIComponent($("[name='upass']").val());

        xRequest1.open("post", "loginCheck.jsp", "true");
        xRequest1.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
        xRequest1.send(data);