<!--
// File: traching.js 
// change picture for teaching .html
function image1() { document.images[this.name].src=this.Image_1.src; };
function image2() { document.images[this.name].src=this.Image_0.src; }; 
function chimg(name,img1,img2) {
      this.name        = name;
      this.Image_0     = new Image(466,366);
      this.Image_0.src = img1;
      this.Image_1     = new Image(466,366);
      this.Image_1.src = img2;
      this.image2      = image2;
      this.image1      = image1;
};
var chimgs;
chimgs  = new chimg("pcitures","../Pictures/starfish.gif","../Pictures/lotus.gif"); 
-->