// JavaScript Document

/* ロールオーバー */

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);
}