/* ===============================================
	ロールオーバー設定
	画像名の後ろの「_on」「_off」で切り替え
=============================================== */
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);
}

/* ===============================================
	プリロード
=============================================== */
function preload() {
	var img01 = new Image();
	var img02 = new Image();
	var img03 = new Image();
	var img04 = new Image();
	var img05 = new Image();
	var img06 = new Image();
	var img07 = new Image();
	var img08 = new Image();
	var img09 = new Image();
	var img10 = new Image();
	var img11 = new Image();
	var img12 = new Image();



	img01.src = "http://www.e-opinion.jp/img/common/btn_top_on.jpg";
	img03.src = "http://www.e-opinion.jp/img/common/btn_filter_on.jpg";
	img04.src = "http://www.e-opinion.jp/img/common/btn_mainte_on.jpg";
	img05.src = "http://www.e-opinion.jp/img/common/btn_factory_on.jpg";
	img06.src = "http://www.e-opinion.jp/img/common/btn_company_on.jpg";
	img07.src = "http://www.e-opinion.jp/img/common/header_info_btn_on.jpg";
	img08.src = "http://www.e-opinion.jp/img/top/contact_mail_ttll.jpg";
	img09.src = "http://www.e-opinion.jp/img/common/right_kiso_btn_on.jpg";
	img10.src = "http://www.e-opinion.jp/img/common/right_info_btn_on.jpg";
	img11.src = "http://www.e-opinion.jp/img/common/bottom_bnr_kiso_on.jpg";
	img12.src = "http://www.e-opinion.jp/img/common/bottom_info_btn_on.jpg";
	
}