//<![CDATA[
function smartRollover() {  
  if(document.getElementsByTagName) { 
    var images = document.getElementsByTagName("img"); 
    for(var i=0; i < images.length; i++) { 
      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); 
}
//]]>