/*
 *
 * Copyright (c) CSS HappyLife
 * http://css-happylife.com/
 *
 * 画像ロールオーバー用
 *
 */
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);   
}

/* ここまで */
<!--検索フォーム用-->
   var GuideSentence = '商品名を入力してください';
   function ShowFormGuide(obj) {
      // 入力案内を表示
      if( obj.value == '' ) {
         obj.value = GuideSentence;
         obj.style.color = '#808080';
      }
   }
   function HideFormGuide(obj) {
      // 入力案内を消す
      if( obj.value == GuideSentence ) {
         obj.value='';
         obj.style.color = '#000000';
      }
   }

<!--ここまで-->