JavaScript implements a simple image rollover method

This article demonstrates an example of how JavaScript can implement a simple image rolloff. Share with you for your reference. The details are as follows:

Let's start with two images of the same size named smirk1.jpg and smirk2.jpg
Then run the following code to do a simple image flip

<script type="text/javascript">
var revert = new Array();
var inames = new Array('smirk');
// Preload
if (document.images) {
 var flipped = new Array();
 for(i=0; i< inames.length; i++) {
  flipped[i] = new Image();
  flipped[i].src = ""+inames[i]+"2.JPG";
 }
}
function over(num) {
 if(document.images) {
  revert[num] = document.images[inames[num]].src;
  document.images[inames[num]].src = flipped[num].src;
 }
}
function out(num) {
 if(docu <script type="text/javascript">
var revert = new Array();
var inames = new Array('smirk');
// Preload
if (document.images) {
 var flipped = new Array();
 for(i=0; i< inames.length; i++) {
  flipped[i] = new Image();
  flipped[i].src = ""+inames[i]+"2.JPG";
 }
}
function over(num) {
 if(document.images) {
  revert[num] = document.images[inames[num]].src;
  document.images[inames[num]].src = flipped[num].src;
 }
}
function out(num) {
 if(document.images) document.images[inames[num]].src = revert[num];
}
</script>

I hope this article is helpful for you to design javascript program.