function createAjax()
    {
    	var ro;
    	var browser = navigator.appName;
    	if(browser == "Microsoft Internet Explorer")
    	{
    		ro = new ActiveXObject("Microsoft.XMLHTTP");
    	}else{
    		ro = new XMLHttpRequest();
    	}
    	return ro;
    }
    
    
    var http = createAjax();
    
    
    function sendRequest(url,action)
    {
    	http.open('post',url);
    	http.onreadystatechange = eval(action);
    	http.send(null);
    
    }