/*
	Standards Compliant Rollover Script
	Author : Daniel Nolan
	http://www.bleedingego.co.uk/webdev.php
*/

function initRollovers() {
	if (!document.getElementById) return
	
	var aPreLoad = new Array();
	var sTempSrc;
	var aImages = document.getElementsByTagName('img');

	for (var i = 0; i < aImages.length; i++) {		
		if (aImages[i].className == 'imgover') {
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '_on'+ftype);

			aImages[i].setAttribute('hsrc', hsrc);
			
			aPreLoad[i] = new Image();
			aPreLoad[i].src = hsrc;
			
			aImages[i].onmouseover = function() {
				sTempSrc = this.getAttribute('src');
				this.setAttribute('src', this.getAttribute('hsrc'));
			}	
			
			aImages[i].onmouseout = function() {
				if (!sTempSrc) sTempSrc = this.getAttribute('src').replace('_on'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}

window.onload = initRollovers;


function preloader() 

{

	// counter
	var i = 0;

	// create object
	imageObj = new Image();
	
	// set image list
	images = new Array();
	images[0]="/img/nav/confcenter_on.gif"
	images[1]="/img/nav/contact_on.gif"
	images[2]="/img/nav/events_calendar_on.gif"
	images[3]="/img/nav/events_musicals_on.gif"
	images[4]="/img/nav/events_speaker_on.gif"
	images[5]="/img/nav/events_special_on.gif"
	images[6]="/img/nav/events_symphony_on.gif"
	images[7]="/img/nav/facility_about_on.gif"
	images[8]="/img/nav/facility_gallery_on.gif"
	images[9]="/img/nav/facility_history_on.gif"
	images[10]="/img/nav/facility_seating_on.gif"
	images[11]="/img/nav/facility_tech_on.gif"
	images[12]="/img/nav/facilityinfo_on.gif"
	images[13]="/img/nav/news_on.gif"
	images[14]="/img/nav/tickets_on.gif"
	images[15]="/img/nav/tickets_roll.gif"
	images[16]="/img/nav/news_roll.gif"
	images[17]="/img/nav/contact_roll.gif"
	images[18]="/img/nav/confcenter_roll.gif"

	// start preloading
	for(i=0; i<=3; i++) 
	{
	  imageObj.src=images[i];
	}


}