/**
 * 画像を見る。
 * @return
 */
function doImagePopup(url, width, height) {
	var selectpopup = document.getElementById('selectpopup');
	selectpopup.className = "showdialog";
	height = parseInt(height);
	width = parseInt(width);

	var width_min = 480;
	var width_max = 640;
	var height_min = 480;
	var height_max = 480;
	if (height > height_max) {
		height = height_max;
	} else if (height < height_min) {
		height = height_min;
	}
	if (width > width_max) {
		width = width_max;
	} else if (width < width_min) {
		width = width_min;
	}

	var html_data = '<table style="width:' + (width - 37) + 'px; height:' + (height - 57) + 'px;"><tr><td class="img_td"><img src="' + url + '"></td></tr></table>';

	doPopup(html_data, width, width, height, height);
}