if (document.images) {
            
             var tempCalcbuttonoff = new Image();
             tempCalcbuttonoff.src = "/images/ProductDivisions/Heat_Transfer_Products/temp-Calc_ButtonOff.gif";
             var tempCalcbuttonon = new Image();
             tempCalcbuttonon.src = "/images/ProductDivisions/Heat_Transfer_Products/temp-Calc_ButtonOn.gif";
             


      }
               function active(imgName) {
                 if (document.images) 
                 document[imgName].src = eval(imgName + 'on.src');
  
      }

               function inactive(imgName) {
               if (document.images)
                 document[imgName].src = eval(imgName + 'off.src');

      }