/********** constants ************/
var _NOSCROLL_POPUP_FEATURES = 'location=0,statusbar=0,menubar=0,resizable=no,scrollbars=no,top=100,left=100,screenX=100,screenY=100';
var _SCROLL_POPUP_FEATURES = 'location=0,statusbar=1,menubar=0,resizable=yes,scrollbars=yes,top=100,left=100,screenX=100,screenY=100';

/********** neatly degrading popup code, props to AListApart ********/
function raw_popup(url, target, can_scroll, w_width, w_height) {
  // define base set depending on whether the window can scroll or not
  var features = _SCROLL_POPUP_FEATURES;
  if (can_scroll==false) features = _NOSCROLL_POPUP_FEATURES;
  // define target attr
  if (isUndefined(target)) target = '_blank';
  // add width and height to features
  if (isUndefined(w_width)) w_width = 400;
  if (isUndefined(w_height)) w_height = 300;
  features += ',width='+w_width+',height='+w_height;
  // call the window
  var theWindow = window.open(url, target, features);
  theWindow.focus();
  return theWindow;
}
function link_popup(src, can_scroll, w_width, w_height) {
  return raw_popup(src.getAttribute('href'), src.getAttribute('target') || '_blank', can_scroll, w_width, w_height);
}


function initRollovers() 
{
	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, '_o'+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('_o'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		} else if (aImages[i].className == 'imgon') {
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '_o'+ftype);
			
			aImages[i].setAttribute('hsrc', hsrc);
			
			aPreLoad[i] = new Image();
			aPreLoad[i].src = hsrc;
			
			
			sTempSrc = aImages[i].getAttribute('src');
			aImages[i].setAttribute('src', aImages[i].getAttribute('hsrc'));			
			
		}
	}
}

function window_init()
{
	if (!document.getElementById) return;
	
	// initialise any rollovers
	initRollovers();
}