// mouseover ------------------------------------------------------------------------------------------------------------

function smartRollover() {  

     if(document.getElementsByTagName) {  

         var images = document.getElementsByTagName("img");  

         for(var i=0; i < images.length; i++) {  

             if(images[i].getAttribute("src").match("_r."))  

             {  

                 images[i].onmouseover = function() {  

                     this.setAttribute("src", this.getAttribute("src").replace("_r.", "_ov."));  

                 }  

                 images[i].onmouseout = function() {  

                     this.setAttribute("src", this.getAttribute("src").replace("_ov.", "_r."));  

                 }  

             }

             else if(images[i].getAttribute("src").match("_off."))  

             {  

                 images[i].onmouseover = function() {  

                     this.setAttribute("src", this.getAttribute("src").replace("_off.", "_on."));  

                 }  

                 images[i].onmouseout = function() {  

                     this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off."));  

                 }  

             }

         }  

     }  

 }  

 if(window.addEventListener) {  

     window.addEventListener("load", smartRollover, false);  

 }  

 else if(window.attachEvent) {  

     window.attachEvent("onload", smartRollover);  

 }