browserName = navigator.appName;
 browserVer = parseInt(navigator.appVersion);
condition1 = (browserName.indexOf("Netscape") >=0 ) && browserVer > 2 ;
condition2 = (browserName.indexOf("Explorer") >= 0) && browserVer > 3
if (condition1 == true  || condition2 == true)
                                 CanAnimate = true;
else
    {CanAnimate = false; }
if (CanAnimate) {
              onimage1 = new Image(209, 199);
              onimage1.src = "gifs/cement.jpg"; 
              offimage1 = new Image(209, 199); 
              offimage1.src = "gifs/default-img.jpg";
              
              onimage2 = new Image(209, 199); 
              onimage2.src = "gifs/marble.jpg"; 
              offimage2 = new Image(209, 199); 
              offimage2.src = "gifs/default-img.jpg";
              
			  onimage3 = new Image(209, 199); 
              onimage3.src = "gifs/mineral.jpg"; 
              offimage3 = new Image(209, 199); 
              offimage3.src = "gifs/default-img.jpg";

              onimage4 = new Image(209, 199); 
              onimage4.src = "gifs/sugarmill.jpg";
              offimage4 = new Image(209, 199); 
              offimage4.src = "gifs/default-img.jpg";

			  onimage5 = new Image(209, 199); 
              onimage5.src = "gifs/granite.jpg";
              offimage5 = new Image(209, 199); 
              offimage5.src = "gifs/default-img.jpg";

                              }
function itson(imgDocID,imgObjName) {
            if (CanAnimate)   
            document.images[imgDocID].src=eval(imgObjName+".src");
                             }