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);
}

$(function(){
    /* div要素を3つずつの組に分ける */
    var sets = [], temp = [];
    $('#wrap02 > div').each(function(i) {
        temp.push(this);
        if (i % 3 == 2) {
            sets.push(temp);
            temp = [];
        }
    });
    if (temp.length) sets.push(temp);

    /* 各組ごとに高さ揃え */
    $.each(sets, function() {
        $(this).flatHeights();
    });
});