//var please_wait = "Working<blink>...</blink>";
var please_wait = null;


function openAjaxUrl(url, target)
{
	if (!document.getElementById) {
		return false;
	}

	if (please_wait != null) {
		document.getElementById(target).innerHTML = please_wait;
	}

	if (window.ActiveXObject) {
		link = new ActiveXObject("Microsoft.XMLHTTP");
	} else if (window.XMLHttpRequest) {
		link = new XMLHttpRequest();
	}

	if (link == undefined) {
		return false;
	}
	link.onreadystatechange = function() { response(url, target); }
	link.open("GET", url, true);
	link.setRequestHeader( "If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT" );
	link.send(null);
}


function response(url, target)
{
	if (link.readyState == 4) {
		document.getElementById(target).innerHTML = (link.status == 200) ? link.responseText : "Broken link: " + link.status;
	}
}

function set_loading_message(msg)
{
	please_wait = msg;
}