var img = new Array;

img[0] = "images/main_image1.jpg";
img[1] = "images/main_image2.jpg";
img[2] = "images/main_image3.jpg";


function random_img(){
        var i = myrandom(img.length) - 1;
        document.write("<img src="+img[i]+" alt='KAMI-GAKARI TOP IMAGE' "+"onMouseOver=Setting(this) />");
}

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];
}
*/