navHome = new Image();
navHome.src = "on/home.gif";
navDucts = new Image();
navDucts.src = "on/ducts.gif";
navCarpet = new Image();
navCarpet.src = "on/carpet.gif";
navCommercial = new Image();
navCommercial.src = "on/commercial.gif";
navResidential = new Image();
navResidential.src = "on/residential.gif";
navEmployment = new Image();
navEmployment.src = "on/employment.gif";
navContact = new Image();
navContact.src = "on/contact.gif";

function imgOn(imgName) {
	if (document.getElementById) {
		document.getElementById("nav" + imgName).src = "on/" + (imgName) + ".gif";
	}
}
function imgOff(imgName) {
	if (document.getElementById) {
		document.getElementById("nav" + imgName).src = "off/" + (imgName) + ".gif";
	}
}



// Fader Stuff

function opacityChange(opacity, thediv, theimage) {
	var object = document.getElementById(thediv).style;
	if (opacity == 99) {
		document.getElementById(theimage).style.backgroundImage = "url(" + document.getElementById(thediv).src + ")";
		object.opacity = 0;
		object.MozOpacity = 0;
		object.KhtmlOpacity = 0;
		object.filter = "alpha(opacity=0)";
	}
	else {
		object.opacity = (opacity/100);
		object.MozOpacity = (opacity/100);
		object.KhtmlOpacity = (opacity/100);
		object.filter = "alpha(opacity=" + opacity + ")";
	}
}
function imageFade(thediv, theimage, imageloc, time) {
	var speed = Math.round(time / 10);
	var timer = 0;
	opacityChange(0, theimage);
	document.getElementById(theimage).src = imageloc;
	for(i = 0; i <= 99; i++) {
		setTimeout("opacityChange(" + i + ",'" + theimage + "','" + thediv + "')",(timer * speed));
		timer++;
	}
}
var slideCache = new Array();
function RunSlideShow(thediv,theimage,imageFiles,displaySecs) {
	var imageSeparator = imageFiles.indexOf(";");
	var nextImage = imageFiles.substring(0,imageSeparator);
	imageFade(thediv,theimage,nextImage,99);
	var nextImages= imageFiles.substring(imageSeparator+1,imageFiles.length)+ ';' + nextImage;	
	
	setTimeout("RunSlideShow('"+thediv+"','"+theimage+"','"+nextImages+"',"+displaySecs+")",displaySecs*1000);
	imageSeparator = nextImages.indexOf(";");
	nextImage = nextImages.substring(0,imageSeparator);
	if (slideCache[nextImage] == null) {
		slideCache[nextImage] = new Image;
		slideCache[nextImage].src = nextImage;
	}

}