// JavaScript Document

window.onload = rolloverInit;
 
function rolloverInit() {
 for (var i=0; i<document.images.length; i++) {
  if (document.images[i].parentNode.tagName == "A") {
   setupRollover(document.images[i]);
  }
 }
}
 
function setupRollover(thisImage) {
 thisImage.outImage = new Image();
 thisImage.outImage.src = thisImage.src;
 thisImage.onmouseout = rollOut;
 
 thisImage.overImage = new Image();
 thisImage.overImage.src = "images/" + thisImage.id + "_on.png";
 thisImage.onmouseover = rollOver; 
}
 
function rollOut() {
 this.src = this.outImage.src;
}
 
function rollOver() {
 this.src = this.overImage.src;
}