var XMLHttpRequestObject = false;

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

function getData(dataSource, divID, data)
{
	if (XMLHttpRequestObject)
	{
		var obj = document.getElementById(divID);
		XMLHttpRequestObject.open( "POST", dataSource );
		XMLHttpRequestObject.setRequestHeader( 'Content-Type', 'application/x-www-form-urlencoded' );
		XMLHttpRequestObject.onreadystatechange = function()
		{
			if ( (XMLHttpRequestObject.readyState == 4) && (XMLHttpRequestObject.status == 200) )
			{
				obj.innerHTML = XMLHttpRequestObject.responseText;
			}
		}
		XMLHttpRequestObject.send("username=" + data);
	}
	else 
	{
		var obj = document.getElementByID(divID);
		obj.innerHTML = "Ajax not supported";
	}
}