var browser;

      var normal_imgs_top;
      var over_imgs_top;	  
      var normal_imgs_side;
      var over_imgs_side;

      function MakeArray(n) {
              this.length = n - 1;
              for (var i = 0; i < n; i++) {
                      this[i] = new Image();
                      }
              return this;
      }

        function msover(num,img_nm, over_array) {
                        if ( browser) { 
                                img_nm.src = over_array[num].src;
                        }
                }

        function msout(num,img_nm, normal_array) {
                        if ( browser) {
                                img_nm.src = normal_array[num].src;
                        }                   
                }