function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

// research
function initMaps() {
	if (document.getElementById) {
		var mapIds = initMaps.arguments;			// pass string IDs of containing map elements
		var i, j, area, areas;
		for (i = 0; i < mapIds.length; i++) {
			areas = document.getElementById(mapIds[i]).getElementsByTagName("area");
	
			for (j = 0; j < areas.length; j++) {	// loop thru img elements
				area = areas[j];
				area.onmousedown = imgSwap;			// set event handlers
				area.onmouseout = imgSwap;
				area.onmouseover = imgSwap;
				area.onmouseup = imgSwap;
			}
		}
	}
}
// image swapping event handling
function imgSwap(evt) {
	evt = (evt) ? evt : event;
	var elem = (evt.target) ? evt.target : evt.srcElement;
	var imgClass = elem.parentNode.name;
	var coords = elem.coords.split(",");
	var clipVal = "rect(" + coords[1] + "px " +
							coords[2] + "px " +
							coords[3] + "px " +
							coords[0] + "px)";
	var imgStyle;
	
	switch (evt.type) {
		case "mousedown" :
			imgStyle = document.getElementById(imgClass + "Down").style;
			imgStyle.clip = clipVal;
			imgStyle.visibility = "visible";
			break;
		case "mouseout" :
			document.getElementById(imgClass + "Over").style.visibility = "hidden";
			document.getElementById(imgClass + "Down").style.visibility = "hidden";
			break;
		case "mouseover" :
			imgStyle = document.getElementById(imgClass + "Over").style;
			imgStyle.clip = clipVal;
			imgStyle.visibility = "visible";
			break
		case "mouseup" :
			document.getElementById(imgClass + "Down").style.visibility = "hidden";
			// guarantee click in IE
			if (elem.click) {
				elem.click();
			}
			break;
	}
	evt.cancelBubble = true;
	return false;
}