var img = new Array;

img[0] = "images/top_image1.jpg";
img[1] = "images/top_image2.jpg";
img[2] = "images/top_image3.jpg";
img[3] = "images/top_image4.jpg";
img[4] = "images/top_image5.jpg";
img[5] = "images/top_image6.jpg";


function random_img(){
        var i = myrandom(img.length) - 1;
        document.write("<div id='keyvisible' "+"style='background:url("+img[i]+") no-repeat';) > <img src='images/keyvisible_bg.png' alt='keyvisible_bg' /><span>縁あって、与那原という町にお店をひらくことになりました。</span></div>" );
}

function myrandom(max){
        var v = max * Math.random();
        if(v == 0.0){v = 1;}else{v = Math.ceil(v);}
        return v;
}

function Setting(obj) {
	var hover = myrandom(img.length) - 1;
	obj.src=img[hover];
}