function getHttpObject(){
	
	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 xmlHttp!");       
				return false;        
			}     
		} 
	}
	return xmlHttp;
}