// This is the implementation of SimpleSwap
// by Jehiah Czebotar
// Version 1.1 - June 10, 2005
// Distributed under Creative Commons
//
// Include this script on your page
// then make image rollovers simple like:
// <img src="/images/ss_img.gif" oversrc="/images/ss_img_over.gif">
//
// http://jehiah.com/archive/simple-swap
// 


function SimpleSwap(el,which){
  el.src=el.getAttribute(which || "origsrc");
}

function SimpleSwapSetup(){
  var x = document.getElementsByTagName("img");
  for (var i=0;i<x.length;i++){
    var oversrc = x[i].getAttribute("oversrc");
    if (!oversrc) continue;
      
    // preload image
    // comment the next two lines to disable image pre-loading
    x[i].oversrc_img = new Image();
    x[i].oversrc_img.src=oversrc;
    // set event handlers
    x[i].onmouseover = new Function("SimpleSwap(this,'oversrc');");
    x[i].onmouseout = new Function("SimpleSwap(this);");
    // save original src
    x[i].setAttribute("origsrc",x[i].src);
  }
}

var PreSimpleSwapOnload =(window.onload)? window.onload : function(){};
window.onload = function(){PreSimpleSwapOnload(); SimpleSwapSetup();}

//
// pop up image script
//

var popupWindow;
function closePopup() {
  if (popupWindow && popupWindow.location && ! popupWindow.closed) popupWindow.close();
}
function openPopup(width, height, url, title) {
  closePopup();
  popupWindow = window.open("../gallery/popup.php?image=" + url, "popup", "width=" + width + ", height=" + height+ ",menubar=yes");
}
function popupImage(url, title) {
  var image = new Image();
  image.onload = function () { openPopup(image.width, image.height, url, title); };
  image.src = url;
}

function tjpopup(url) {
	window.open("../gallery/image.php?image=" + url, "popup", "width=100, height=100, menubar=no, toolbar=no");
}

// 
// other scripts
//

     
/* used to display text in pd flow diagram */     
	function rolly(displaytext){
		document.getElementById("explanation").innerHTML = displaytext
	}