var ie = document.all;
var ns = document.getElementById && !document.all;
var popPhotoQty = 0;
var popPhoto = document.getElementById("popPhoto");

// Example:
// simplePreload( '01.gif', '02.gif' ); 
function simplePreload()
{ 
  var args = simplePreload.arguments;
  document.imageArray = new Array(args.length);
  for(var i=0; i<args.length; i++)
  {
    document.imageArray[i] = new Image;
    document.imageArray[i].src = args[i];
  }
}

simplePreload("menu/about_over.gif","menu/contact_over.gif","menu/links_over.gif","menu/projects_over.gif","menu/shop_over.gif","menu/specialties_over.gif")

function swap (imgName,swapTo) {
	document.images[imgName].src = swapTo;
	}
	
function scrollColumns () {
	if (ns) {
		scrollAd = window.pageYOffset
		}
	else {
		scrollAd = document.body.scrollTop
		}
	if (scrollAd <= 70) {
		scrollAd = 0 }
	else { scrollAd -= 70 }
	document.getElementById("rtColumn").style.top = (20 + scrollAd) + "px";
	if (document.getElementById("Popup")) {
		document.getElementById("Popup").style.top = (15 + scrollAd) + "px" }
	}
	
function openPopup(photoName,q) {
	popPhotoQty = q;
	if (ns) {
		scrollAd = window.pageYOffset;
		}
	else {
		scrollAd = document.body.scrollTop
		}
	popup = document.getElementById("Popup");
	popup.style.top = scrollAd + 105;
	popup.style.visibility = "visible";
	document.getElementById("popPhoto").src = photoName + "_1.jpg";
	}
	
function closePopup() {
	document.getElementById("Popup").style.visibility = "hidden";
	}
	
function nextPhoto() {
	u = document.getElementById("popPhoto").src
	c = u.charCodeAt(u.lastIndexOf(".")-1) - 48;
	if (c == popPhotoQty) {
		c = 1
	} else {
		c += 1
	}
	document.getElementById("popPhoto").src = u.slice(0,u.lastIndexOf("_")) + "_" + c + ".jpg";
	}
	
function prevPhoto() {
	u = document.getElementById("popPhoto").src
	c = u.charCodeAt(u.lastIndexOf(".")-1) - 48;
	if (c == 1) {
		c = popPhotoQty
	} else {
		c -= 1
	}
	document.getElementById("popPhoto").src = u.slice(0,u.lastIndexOf("_")) + "_" + c + ".jpg";
	}