function XmlObject()
{
var xmlHttp = null;
try
{
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
}
catch(e)
{
try
{
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
catch(e)
{
}
}
if(xmlHttp == null)
{
xmlHttp = new XMLHttpRequest();
}
if(!xmlHttp)
{
alert("Trinh Duyet khong ho tro Ajax");
return;
}
return xmlHttp;
}
function getRequest(param, divID)
{
if(divID)
{
var req = XmlObject();
var idTimer = 0;
if(req)
{
req.open('GET',param, true);
req.onreadystatechange = function()
{
document.getElementById(divID).innerHTML ="
";
getItem(req, divID);
}
req.send(null);
}
}
}
function doUpdate(param)
{
var req = XmlObject();
var idTimer = 0;
if(req)
{
req.open('GET',param, true);
req.onreadystatechange = function()
{
if(req.readyState == 4)
{
if (req.status == 200)
{
// alert("status 200");
result = req.responseText;
alert(result);
}
else
{
alert('Request khong dung');
return false;
}
}
}
req.send(null);
}
}
function getItem(req, divID)
{
if(req.readyState == 4)
{
if (req.status == 200)
{
result = req.responseText;
// alert(result);
document.getElementById(divID).innerHTML = result;
}
else
{
alert('Request khong dung');
document.getElementById(divID).innerHTML = 'Bi loi roi';
return false;
}
}
}
function postRequest(url, para, divID)
{
var post = XmlObject();
// para = '';
/*for(var i = 0; i < obj.elements.length; i++)
{
if(obj.elements[i].name != '')
para += obj.elements[i].name + '=' + encodeURIComponent(obj.elements[i].value) + '&';
} */
//para = encodeURIComponent(para.substring(0, para.length - 1) + '&rand=' + Math.random());
post.onreadystatechange = function()
{
document.getElementById(divID).innerHTML = "
";
getItem(post, divID);
}
post.open('POST', url, true);
post.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
post.setRequestHeader("Content-length", para.length);
post.setRequestHeader("Connection", "close");
post.send(para);
}
function isNumberKey(evt)
{
var charCode = (evt.which) ? evt.which : event.keyCode
if (charCode > 31 && (charCode < 48 || charCode > 57))
return false;
return true;
}