if (document.images)
   {
	 function replace1()
	 {
	 pic2on.onerror=replace3;
	 pic2off.onerror=replace3;
	 pic1on.onerror=replace3;
	 this.src="http://www.tru.ca/assets/homepage/mouseover/image1.jpg";
	 }
	 function replace2()
	 {
	 pic2on.onerror=replace1;
	 this.src="http://www.tru.ca/assets/homepage/mouseover/image2.jpg";
	 }
	 function replace3()
	 {
	 this.src="http://www.tru.ca/assets/homepage/mouseover/image3.jpg";
	 }
     pic1on= new Image(100,25);
	 pic1on.onerror=replace1;
	 pic1on.src="http://www.tru.ca/assets/homepage/mouseover/image2.jpg";
	 
	 pic1off= new Image(100,25);
	 pic1off.onerror=replace3;
     pic1off.src="http://www.tru.ca/assets/homepage/mouseover/image1.jpg";
	 
	 pic2on= new Image(100,25);
	 pic2on.onerror=replace2;
     pic2on.src="http://www.tru.ca/assets/homepage/mouseover/image4.jpg";
	
     pic2off= new Image(100,25);
	 pic2off.onerror=replace1;
     pic2off.src="http://www.tru.ca/assets/homepage/mouseover/image3.jpg";
   }