var http = createRequestObject();
function createRequestObject()
{
	var xmlHttp;
	try
	{
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
	}
	catch (e)
	{
		// Internet Explorer
		try
		{
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			try
			{
				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e)
			{
				alert("Your browser does not support AJAX!");
				return false;
			}
		}
	}
	return xmlHttp;
}

function sendReq(serverFileName) 
{
	http.open('get', serverFileName);
	http.onreadystatechange = handleResponse;
    http.send(null);
}

function handleResponse() 
{
	if(http.readyState == 4 && http.status == 200 )
	{
		responseText = http.responseText;
		ajaxProcessComplete(responseText);				
    }
}