$(document).ready(function(){
	var jmp = [
		"/banner/top/20120206_1_mamoru_top.html",
		"/banner/top/20120201_1.html",
		"/banner/top/20111118_1.html",
		"/banner/top/20100415_1.html"
	];

	var img = [
		"/_top/random_banner/00000105.gif",
		"/_top/random_banner/00000104.jpg",
		"/_top/random_banner/00000099.gif",
		"/_top/random_banner/00000017.gif"
	];

	var tar = [
		"_blank",
		"_blank",
		"_blank",
		"_blank"
	];
	
	var n = Math.floor(Math.random()*jmp.length);

	$('#random_banner_href').attr( "href", jmp[n] );
	$('#random_banner_href').attr( "target", tar[n] );
	$('#random_banner_img').attr( "src", img[n] );
	$('#random_banner_img').attr( "width", "350" );
	$('#random_banner_img').attr( "height", "160" );
});