var nav;
	if (navigator.userAgent.indexOf("Safari") > 0)
			nav = "Safari";
	else if (navigator.product == "Gecko")
			nav = "Gecko";
	else
			nav = "IE";

function liveUpdaterUri(uri)
{
	return liveUpdater(function() { return uri; } , false);
}

// Selection in a list box, add the selected index to the callback
function liveSelect(id, uri)
{
	function constructUri()
	{
		return addParameter(uri, "s", document.getElementById(id).selectedIndex.toString());
	}
	return liveUpdater(constructUri, false);
}

// Key stroke in an entry field, add the field value to the callback
function liveSearch(id, uri)
{
	function constructUri()
	{
		return addParameter(uri, "s", document.getElementById(id).value);
	}

   	var updater = liveUpdater(constructUri, false);
	var last = document.getElementById(id).value;
	var timeout = false;
  
	function update()
	{
		if (last != document.getElementById(id).value) {
			last = document.getElementById(id).value;
			updater();
		}
	}
	   
	function start() {
		if (timeout)
			window.clearTimeout(timeout);
		timeout = window.setTimeout(update, 300);
	}

	if (navigator.userAgent.indexOf("Safari") > 0)
		document.getElementById(id).addEventListener("keydown",start,false);
	else if (navigator.product == "Gecko")
		document.getElementById(id).addEventListener("keypress",start,false);
	else
		document.getElementById(id).attachEvent("onkeydown",start);
}

// Click
function liveClick(id, uri)
{
	return liveUpdaterUri(uri);
}

// Click in a checkbox
function liveCheck(id, uri)
{
	function constructUri()
	{
		return addParameter(uri, "s", document.getElementById(id).checked);
	}
	return liveUpdater(constructUri);
}

function liveScroll(id, uri)
{
   function constructUri()
   {
         return addParameter(uri, "s", document.getElementById(id).scrollTop.toString());
   }
   
   var updater = liveUpdater(constructUri, false);
   var timeout = false;

    function start() {
	   if (timeout)
	       window.clearTimeout(timeout);
	   
    	   timeout = window.setTimeout(updater, 100);
    }
   return start;
}

function timedUpdate(uri, milliSeconds)
{
	var updater = liveUpdaterUri(uri, false);
	updater();
	var again = "timedUpdate(\""+uri+"\","+milliSeconds+")";
	setTimeout(again, milliSeconds);
}