var ajaxRequest=null;  // The variable that makes Ajax possible!

//Browser Support Code
function ajaxConnect()
{
	try
	{
		// Opera 8.0+, Firefox, Safari
		ajaxRequest = new XMLHttpRequest();
	} catch (e)
	{
		// Internet Explorer Browsers
		try
		{
			ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e)
		{
			try
			{
				ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e)
			{
				// Something went wrong
				alert("Your browser broke!");
				return false;
			}
		}
	}
}

function ajaxOpenLoading(loading_img)
{
	ajax_load=document.getElementById("ajax_onloading");
	if(ajax_load==null)
	{
		ajax_body=document.getElementsByTagName("body")[0];
		ajax_body.innerHTML+="<div id='ajax_onloading' style='filter:alpha(opacity=70); -moz-opacity:0.70; opacity:0.70; background-color:#000000; width:300px; display: none; position: absolute; font-size:large; font-weight:bold; color:#FFFFFF;' align='center'>LOADING...<br><img style='padding-top:20px; padding-bottom:40px;' src='"+loading_img+"'></div>";
		ajaxOpenLoading();
	}else
	{
		//controllo browser
		var browserUtente = navigator.userAgent.toUpperCase();
		if(browserUtente.indexOf("MSIE")>0)
		{
			var width=(document.body.clientWidth/2+document.body.scrollLeft-110);
			var height=(document.body.clientHeight/2+document.body.scrollTop);
		}else
		{
			var width=(window.innerWidth/2+window.pageXOffset-150);
			var height=(window.innerHeight/2+window.pageYOffset-70);
		}
		ajax_load.style.display='block';
		ajax_load.style.top=height+"px";
		ajax_load.style.left=width+"px";
	}
}

function ajaxCloseLoading()
{
	ajax_load.style.display='none';
}