/*
Author: Thanh Hu*ng
Phone: 0978893678
*/

function getXmlHttpRequestObject() {
 if (window.XMLHttpRequest) {
    return new XMLHttpRequest(); //Mozilla, Safari ...
 } else if (window.ActiveXObject) {
    return new ActiveXObject("Microsoft.XMLHTTP"); //IE
 } else {
    //Display our error message
    alert("Your browser doesn't support the XmlHttpRequest object.");
 }
}

var receiveReq = getXmlHttpRequestObject();
function makeRequest(url, param) {
 if (receiveReq.readyState == 4 || receiveReq.readyState == 0) {
   //Set up the connection to captcha_test.html. True sets the request to asyncronous(default) 
   receiveReq.open("POST", url, true);
   receiveReq.onreadystatechange = updatePage; 
   receiveReq.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
   receiveReq.setRequestHeader("Content-length", param.length);
   receiveReq.setRequestHeader("Connection", "close");
   receiveReq.send(param);
 }   
}
function updatePage() {
 if (receiveReq.readyState == 4) {
	 //alert('dasdsa');
  document.getElementById('check').innerHTML = receiveReq.responseText; 
 }
}
function getvalue(theForm,url) {
 var postStr = theForm.txtKey.name + "=" + theForm.txtKey.value;
 makeRequest(url, postStr);
}