// generic xmlhttp object function
function getHTTPObject()
{
	var http;
	if (window.XMLHttpRequest)
	{ // Mozilla, Safari,...
		http = new XMLHttpRequest();
	}else if(window.ActiveXObject)
	{ // IE
		try 
		{
			http = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			try
			{
				http = new ActiveXObject("Microsoft.XMLHTTP");
			}catch(e2)
			{
			
			}
		}
	}else
	{
		ajdisabled = 1;
		/* disable this because this user has an ancient browsers */
		/* alert("failed to creat the http object");*/
	}
	return http; 
}


var update_interval =8;		// number of seconds between updates
var ajdisabled = 0;			// disables ajax functionality
var banners = null;			// this will hold all the banners
var current_banner = 0;		// this will always be the current banner, default to 0
// should be no need to edit any vars below this line
var stats_age = 0;

var banner_update_interval = 120;		// duration between updates of actual banner data
var banner_last_update = 0;			// dont change this default val

var url = "http://www.stignace.org/banner.js";
var doing_query = 0;
var Seconds = 0;
var Minutes = 0;
var Hours = 0;
var TT = '';
var TimerOn = false;
var totalSeconds = 0;
var next_update =0;

var http = getHTTPObject(); // We create the HTTP Object

function do_query()
{
	doing_query = 1;
	//alert("doing query, lastupdate" + banner_last_update);
	http.open("GET",url,true);
	http.onreadystatechange = function()
	{
		if(http.readyState == 4)
		{
			var results = http.responseText;
			stats_age = 0;
			doing_query =0;	// done with the query;
			// propigate the banners array
			banners = results.split('|');
		}
		return true;
	}
	http.send(null);
}

function update_banner()
{
	// here we need to select a random banner to display
	max = banners.length;	// number of elements in the banner array
	mykey = Math.floor(Math.random()*max);
	
	if(mykey == current_banner)
	{
		// if we are the same as the current one, try again
		mykey = Math.floor(Math.random()*max);
	}
	//alert(banners[mykey]);
	document.getElementById('banner_area').innerHTML = banners[mykey];	// populate the banner area
}

function BannerRotateTimer()
{
	// this updates the banner content, not the banners themselves
	/* 
	banner_last_update++;
	if(banner_last_update == banner_update_interval && doing_query!=1)
	{
		do_query();
		banner_last_update = 0;
	}
	 */
	// end of banner content update
	
	if( ++Seconds > 59 )
	{
		Minutes++;
		Seconds = 0;
		if(Minutes > 59)
		{
			Hours++;
			Minutes = 0;
		}
	}
	
	if( ++stats_age > update_interval && doing_query!=1 )
	{
		update_banner();
		stats_age=0;
	}
	
	Seconds = (Seconds<10 ? '0' : '') + Seconds;
	++totalSeconds;
	
	if(doing_query)
	{
		stats_age = 0;
		next_update = 'In Progress';
	}
	
	TT = setTimeout("BannerRotateTimer()", 1000);
}

function ToggleTimer()
{
	if( !TimerOn )
	{
		TT = setTimeout("BannerRotateTimer()", 1000);
		TimerOn = true;
	}else
	{
		TT = clearTimeout( TT );
		TimerOn = false;
	}
}
if(ajdisabled==0)
{
	do_query();
	ToggleTimer();
}