function gethttp_request()
{
			var http_request;
			if(window.ActiveXObject){
			    http_request = new ActiveXObject("Microsoft.XMLHTTP");
			}else if(window.ActiveXObject){
			    http_request = new ActiveXObject("Msxml2.XMLHTTP.4.0");
			}else if(window.ActiveXObject){
			    http_request = new ActiveXObject("Msxml2.XMLHTTP");
			}else if(window.XMLHttpRequest){
			    http_request = new XMLHttpRequest();
			    if (http_request.overrideMimeType) 
				{	
					http_request.overrideMimeType('text/xml');
				}
			}			
			if (!http_request) 
			{
				
				return false;
			}
			return http_request
}