var imglist = new Array(
"images/top_ship/top_ships01.jpg",
"images/top_ship/top_ships02.jpg",
"images/top_ship/top_ships03.jpg",
"images/top_ship/top_ships04.jpg",
"images/top_ship/top_ships05.jpg",
"images/top_ship/top_ships06.jpg",
"images/top_ship/top_ships07.jpg",
"images/top_ship/top_ships08.jpg",
"images/top_ship/top_ships09.jpg",
"images/top_ship/top_ships10.jpg",
"images/top_ship/top_ships11.jpg",
"images/top_ship/top_ships12.jpg",
"images/top_ship/top_ships13.jpg",
"images/top_ship/top_ships14.jpg",
"images/top_ship/top_ships15.jpg" );
var selectnum = Math.floor((Math.random() * 100)) % imglist.length;
function randomIMG() {
	document.write('<img id="topimg" src="'+imglist[selectnum]+'" width="980" height="150" alt="JSA 社団法人日本船主協会" />');
}
//$(document).ready(function(){
//	$("#topimg").attr("src",imglist[selectnum])
//});