if (document.images) {

                   one = new Image();
                   oneHot = new Image();
                   two = new Image();
                   twoHot = new Image();
                   three = new Image();
                   threeHot = new Image();
                   four = new Image();
                   fourHot = new Image();
                   five = new Image();
                   fiveHot = new Image();
                   six = new Image();
                   sixHot = new Image();
                   seven = new Image();
                   sevenHot = new Image();

                   one.src = "images/b_1.gif";
                   oneHot.src = "images/b_1_over.gif";
                   two.src = "images/b_2.gif";
                   twoHot.src = "images/b_2_over.gif";
                   three.src = "images/b_3.gif";
                   threeHot.src = "images/b_3_over.gif";
                   four.src = "images/b_4.gif";
                   fourHot.src = "images/b_4_over.gif";
                   five.src = "images/b_5.gif";
                   fiveHot.src = "images/b_5_over.gif";
                   six.src = "images/b_6.gif";
                   sixHot.src = "images/b_6_over.gif";
                   seven.src = "images/b_7.gif";
                   sevenHot.src = "images/b_7_over.gif";

             }

           // mouse roll over function
           function makeHot(imageName) {

                   if (document.images) {
                           document[imageName].src = eval(imageName + "Hot.src");
                   }
           }

           // mouse roll over function
           function makeNormal(imageName) {

                   if (document.images) {
                           document[imageName].src = eval(imageName+ ".src");
                   }
           }