function rollOver() {   
  if(document.getElementsByTagName) {   
    var changeImg = ["img","input"];   
    var length01 = changeImg.length;   
    for( var i=0; i<length01; i++ ) {   
      var length02 = document.getElementsByTagName(changeImg[i]);   
      var length03 = length02.length;   
      for(var j=0; j<length03; j++) {   
        var overImg = length02[j].getAttribute("src");   
        if( overImg ) {   
          if(length02[j].getAttribute("src").match(/_off\./))   
          {   
            length02[j].onmouseover = function() {
              this.setAttribute("src", this.getAttribute("src").replace("_off.", "_on."));   
            }   
            length02[j].onmouseout = function() {   
              this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off."));   
            }   
          }   
        }   
      }   
    }   
  }   
}   
if(window.addEventListener) {   
  window.addEventListener("load", rollOver, false);   
}   
else if(window.attachEvent) {   
  window.attachEvent("onload", rollOver);   
}