// Image Swapper
if (document.images)
   {
     image1= new Image(720,198);
     image1.src="images/main-pic.jpg";  
     image2= new Image(720,198);
     image2.src="images/web-main-pic.jpg";
     image3= new Image(720,198);
     image3.src="images/marketing-main-pic.jpg";  
     image4= new Image(720,198);
     image4.src="images/graphic-main-pic.jpg";   
   }

function change1(picName,imgName)
 {
   if (document.images)
    {
      imgOn=eval(imgName + ".src");
      document[picName].src= imgOn;
    }
 }