function GetBrowser()
{
	var xmlHTTP =null;
	try 
	{
		//firefox ,sarfari,opera;
		xmlHTTP   = new XMLHttpRequest();
	}
	catch(e)
	{
		//FOR IE
		try
		{
			xmlHTTP = new ActiveXObject("Msxml2.XMLHTTP");	
			
		}
		catch(E)
		{
			xmlHTTP = new ActiveXObject("Microsoft.XMLHTTP");			
		}
	}
	return xmlHTTP;
}