function setRollOver() {

	var loadedImg = new Array();
	if (!document.getElementsByTagName) return false;
	var ovrImgList = document.getElementsByTagName('img');
	for (var i = 0; i < ovrImgList.length; i++) {
		if (ovrImgList[i].src.match(/_off\./i)) {
			loadedImg[i] = new Image();
			loadedImg[i].src = ovrImgList[i].src.replace(/_off\./i, '_on.');
			ovrImgList[i].onmouseover = function() { // マウスオーバー
				this.src = this.src.replace(/_off\./i, '_on.');
			}
			ovrImgList[i].onmouseout = function() { // マウスアウト
				this.src = this.src.replace(/_on\./i, '_off.');
			}
			if (navigator.userAgent.indexOf('MSIE') < 0) ovrImgList[i].onmouseup = function() { // クリック後のロールオーバー解除
				this.src = this.src.replace(/_on\./i, '_off.');
			}
		}
	}

	if($("#top-ul").length){
		$('#top-ul').masonry({
			minColCount: 5,
			columnWidth: 1, 
			animate: true, 
			animationOptions: {
				duration: 500,
				easing: 'easeInOutCirc',
				queue: false
			}
		});
	}

	return true;
}
if (window.addEventListener) window.addEventListener('load', setRollOver, false);
if (window.attachEvent) window.attachEvent('onload', setRollOver);