$(function(){
    $("#visualBg ul li a").bind("mouseenter",function(){
	    var num = $(this).attr("name");
        var bglink = "img/toppage/image"+num+".jpg";
        $("div#visualElement").css("background-image","url("+bglink+")");
		$("div#visualElement").fadeTo(0,0);
		$("div#visualElement").fadeTo(200,1.0,function () {
            $("div#visualBg").css("background-image","url("+bglink+")");
        });
		$("div#content01").css("background-color","#ffffff");
    });
	$("#visualBg ul").bind("mouseleave",function(){
        $("div#visualElement").fadeTo(200,0);
		$("div#visualBg").css("background-image","url(img/toppage/main_image.jpg)");
    });
});