// ロールオーバースクリプト
function smartRollover(){if(document.getElementsByTagName){var images = document.getElementsByTagName("img");for(var i=0; i < images.length; i++){if(images[i].getAttribute("src").match("_a.")){images[i].onmouseover = function(){this.setAttribute("src", this.getAttribute("src").replace("_a.","_b."));};images[i].onmouseout = function(){this.setAttribute("src", this.getAttribute("src").replace("_b.","_a."));}}}}}if(window.addEventListener){window.addEventListener("load",smartRollover,false);}else if(window.attachEvent){window.attachEvent("onload",smartRollover);}