// 画像プリロード
var imgs = new Array();

// 画像プリロード
if(document.images) {

	imgs[0] = new Image();  imgs[0].src = "/internship/common/icon_sitemap.gif";
	imgs[1] = new Image();  imgs[1].src = "/internship/common/bg_menu.gif";
	imgs[2] = new Image();  imgs[2].src = "/internship/common/banner_internship.jpg";
	imgs[3] = new Image();  imgs[3].src = "/internship/common/banner_mailto.gif";
	imgs[4] = new Image();  imgs[4].src = "/internship/common/bg_menu_ov.gif";
	imgs[5] = new Image();  imgs[5].src = "/internship/common/bg_menu_ov2.gif";
	imgs[6] = new Image();  imgs[6].src = "/internship/common/bg_menu_ov3.gif";
}

// 画像プリロード
function AD_location(id, imgname) {
	if(document.images) {
		if(imgs[imgname]) {
			document.images[id].src = imgs[imgname].src;
		}
		else {
			document.images[id].src = imgname;
		}
	}
	
	imgname2 = imgname - 1;
	imgs[imgname2].src = imgs[imgname].src;
	
}