function loadRadar() {

ChangeTime = new Date();

time_10 = 10 * 60* 1000;
ChangeTime.setTime(ChangeTime.getTime() - time_10);
//alert('DAY= '+ChangeTime.toGMTString());

var yy = ChangeTime.getYear().toString();
var MM = zero(ChangeTime.getMonth()+1);
var dd = zero(ChangeTime.getDate());
var hh = zero(ChangeTime.getHours());
var mm = mod(ChangeTime.getMinutes());

var url = 'http://www.jma.go.jp/jp/radnowc/imgs/radar/203/'+yy + MM + dd + hh + mm + '-00.png';
img1 = new Image();
img1.src = url;
//alert(img1.src);
document.hoge.src = img1.src
}

function mod(d) {
	<!-- 時間差"-1"する事で10分前の設定になる-->
	dd = Math.floor(d / 10);
	if (dd < 0) {
		dd = 5;
	}
	return zero(dd *10);
}

function zero(d) {
	var suuji;
	if (d < 10) {
		d = "0" +d;
	}
	return d.toString();
}