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();}



/* Popup on hover */
function ShowPopup(hoveritem, text) {
	hp = document.getElementById("hoverpopup");
	pos = findPos(hoveritem);
	hp.style.top = (pos[1] + 18) + "px";
	hp.style.left = (pos[0] + 20) + "px";

	//hh = document.getElementById("hoverheader");
	//hh.firstChild.data = header;
	//console.log(header);
	
	ht = document.getElementById("hovertext");
	ht.firstChild.data = text;
	
	hp.style.visibility = "Visible";
}

function HidePopup() {
	hp = document.getElementById("hoverpopup");
	hp.style.visibility = "Hidden";
}

function findPos(obj) {
	var curleft = curtop = 0;
	if (obj.offsetParent) {
		curleft = obj.offsetLeft
		curtop = obj.offsetTop
		while (obj = obj.offsetParent) {
			curleft += obj.offsetLeft
			curtop += obj.offsetTop
		}
	}
	return [curleft,curtop];
}

function out(s) {
	console.log(s);
}