AJAX Code

 <script language="javascript" type="text/javascript">  
 var actNo="";  
 function getXMLHTTP() { //fuction to return the xml http object  
  var xmlhttp;  
  if (window.XMLHttpRequest)  
   {// code for IE7+, Firefox, Chrome, Opera, Safari  
    xmlhttp=new XMLHttpRequest();  
   }  
  else  
   {// code for IE6, IE5  
   xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");  
    }   
  return xmlhttp;  
 }  
 var req = getXMLHTTP();  
  function getdetails(pay_type) {  
  var strURL="getwithdrawdetails.php?pay_type="+pay_type;  
  req.onreadystatechange = statechanged;  
  req.open("GET", strURL, true);  
  req.send(null);  
  }  
  function statechanged(){  
  if (req.readyState == 4) {  
   // only if "OK"  
   document.getElementById("withdrawdetails").innerHTML = req.responseText;  
  }  
  }  
 </script>  
  **********************************************  
 Ajax with success redirection with file upload  
  **********************************************  
 $(function () {  
   $("#testfrm").validate({  
     rules: {  
       name: {  
         required: true  
       },  
       address: {  
         required: true,  
         maxlength: 100  
       },  
       file: {  
         required: true  
       }  
     },  
     messages: {  
       name: {  
         required: "Please select name."  
       },  
       address: {  
         required: "Please enter address.",  
         maxlength: 'Address length should not be more than 100.'  
       },  
       file: {  
         required: "Please select file."  
       }  
     },  
     submitHandler: function (response) {  
       var formData = new FormData($('#testfrm')[0]);  
       $.ajax({  
         url: set_your_url,  
         type: 'POST',  
         data: formData,  
         dataType: 'json',  
         contentType: false,  
         processData: false,  
         beforeSend: function () {            
           // Start loading            
         },  
         complete: function () {  
           //Stop loading  
         },  
         success: function (response) {  
           switch (response.status) {  
             case 1:  
               showalert(response.msg, 'testfrm', 'alert-danger');  
               $('form[name="testfrm"]').trigger("reset");  
               break;  
             case 0:  
               showalert(response.msg, 'testfrm', 'alert-success');  
               window.location = 'redirection location';                
               break;  
             default:  
               break;  
           }  
         }  
       });  
     }  
   });  
 });