function XMLHttpRequestClass()
{
		var XMLHttpRequestObject = false;
				
		if (window.XMLHttpRequest) 
		{
				XMLHttpRequestObject = new XMLHttpRequest();
		} 
		else if (window.ActiveXObject) 
		{
				XMLHttpRequestObject = new ActiveXObject("Microsoft.XMLHTTP");
		}										
		
		this.XMLHttpRequest = XMLHttpRequestObject;
}