var request = createXMLHttpRequest();
var request1 = createXMLHttpRequest();
var request2 = createXMLHttpRequest();
var request3 = createXMLHttpRequest();
var request4 = createXMLHttpRequest();


function createXMLHttpRequest() 
{ 
	var ua; 
	if(window.XMLHttpRequest) 
	{ 
		try 
		{ 
			ua = new XMLHttpRequest(); 
		} 
		catch(e) 
		{ 
			ua = false; 
		} 
	} 
	else if(window.ActiveXObject) 
	{ 
		try 
		{ 
			ua = new ActiveXObject("Microsoft.XMLHTTP"); 
		} 
		catch(e) 
		{ 
			ua = false; 
		} 
	} 
	return ua; 
}