/*-------------------------------------------------
Title:		oXpo 2007 JavaScript functions
Author:		John Reed, john@studiobonito.com
Updated:	August 4 2007 by jtr
------------------------------------------------- */



// addLoadEvent
function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}



// countdown function
function countdown() {
	if(!document.getElementById) return false;
	
	// initialize variables
	var now = new Date();
	var theEvent = new Date("Oct 25 2007 00:00:01");
	var seconds = (theEvent - now) / 1000;
	var minutes = seconds / 60;
	var hours = minutes / 60;
	var days = hours / 24;
	
	// round the days
	days = Math.ceil(days);
	
	var counter = document.getElementById('counter');
	
	if(days > 0) {
		counter.innerHTML = days;
	} else {
		counter.innerHTML = '0';
	}
}



// random order function
function randomOrder() {
	return (Math.round(Math.random())-0.5);
}



// random sponsor function
function randomSponsor() {
	if(!document.getElementById) return false;
	
	var sponsorList = document.getElementById('sponsorList');
	var sponsorArray = new Array();
	
	sponsorArray[0] = '<a href="sponsors.aspx#cme"><img src="images/logos/cme.png" alt="Chicago Mercantile Exchange" width="150" height="40" /></a><br /><br />';
	sponsorArray[1] = '<a href="sponsors.aspx#dti"><img src="images/logos/dti.jpg" alt="DTI" width="108" height="60" /></a><br /><br />';
	sponsorArray[2] = '<a href="sponsors.aspx#phlx"><img src="images/logos/phlx.gif" alt="PHLX" width="161" height="45" /></a><br /><br />';
	sponsorArray[3] = '<a href="sponsors.aspx#trade-ideas"><img src="images/logos/trade-ideas.jpg" alt="Trade-Ideas, LLC" width="150" height="44" /></a><br /><br />';
	
	sponsorArray.sort(randomOrder);
	
	sponsorList.innerHTML = '<h2>Special Thanks to Our Sponsors:</h2>' + sponsorArray.join('');	
}



//popup function
function popup(sURL, WinName, sWidth, sHeight){

	var sFeatures;
	sFeatures='width=' + sWidth + ',height=' + sHeight + ',toolbar=no,scrollbars=no';
	
	window.open(sURL,WinName,sFeatures);
}