http://www.seta-inter.com/common/js/rollover.js

1/*
2	Standards Compliant Rollover Script
3	Author : Daniel Nolan
4	http://www.bleedingego.co.uk/webdev.php
5*/
6
7function initRollovers() {
8	if (!document.getElementById) return
9	
10	var aPreLoad = new Array();
11	var sTempSrc;
12	var aImages = document.getElementsByTagName('img');
13
14	for (var i = 0; i < aImages.length; i++) {		
15		if (aImages[i].className == 'imgover') {
16			var src = aImages[i].getAttribute('src');
17			var ftype = src.substring(src.lastIndexOf('.'), src.length);
18			var hsrc = src.replace(ftype, '_on'+ftype);
19
20			aImages[i].setAttribute('hsrc', hsrc);
21			
22			aPreLoad[i] = new Image();
23			aPreLoad[i].src = hsrc;
24			
25			aImages[i].onmouseover = function() {
26				sTempSrc = this.getAttribute('src');
27				this.setAttribute('src', this.getAttribute('hsrc'));
28			}	
29			
30			aImages[i].onmouseout = function() {
31				if (!sTempSrc) sTempSrc = this.getAttribute('src').replace('_on'+ftype, ftype);
32				this.setAttribute('src', sTempSrc);
33			}
34		}
35	}
36}
37
38window.onload = initRollovers;
39
40
41function MM_swapImgRestore() { //v3.0
42  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
43}
44
45function MM_preloadImages() { //v3.0
46  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
47    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
48    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
49}
50
51function MM_findObj(n, d) { //v4.01
52  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
53    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
54  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
55  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
56  if(!x && d.getElementById) x=d.getElementById(n); return x;
57}
58
59function MM_swapImage() { //v3.0
60  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
61   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
62}
63
64function MM_openBrWindow(theURL,winName,features) { //v2.0
65  window.open(theURL,winName,features);
66}