var photos = [];
photos[photos.length] = {"src": "devils_tower1.jpg", "caption": "1:WY24からデビルズ・タワーが見える"};
photos[photos.length] = {"src": "devils_tower2.jpg", "caption": "2:デビルズ・タワーと裾野"};
photos[photos.length] = {"src": "devils_tower3.jpg", "caption": "3:近づいた写真(ズームイン）"};
photos[photos.length] = {"src": "devils_tower4.jpg", "caption": "4:少しはなれたところから（ズームアウト）"};
photos[photos.length] = {"src": "devils_tower5_uper.jpg", "caption": "5:空からの写真"};


window.onload = function() {
	var menu = document.createElement("form");
	var menulist = document.createElement("select");
	
	document.body.appendChild(menu);
	menu.appendChild(menulist);
	var options = new Array();
	var caption = document.createTextNode("選んでください");
	options[0] = document.createElement("option");
	options[0].appendChild(caption);
	menulist.appendChild(options[0]);
	for(var i = 0; i<photos.length; i++) {
		var caption = document.createTextNode(photos[i].caption);
		options[i+1] = document.createElement("option");
		options[i+1].appendChild(caption);
		menulist.appendChild(options[i+1]);
	}

	menulist.onchange = function() {
		if(!this.selectedIndex) return false;
		if(document.getElementById("photoframe")) {
			var photoframe = document.getElementById("photoframe");
		} else {
			var photoframe = document.createElement("img");
			photoframe.id = "photoframe";
			photoframe.width = "240";
			photoframe.height = "180";
			document.body.appendChild(photoframe);
		}
		photoframe.src = photos[this.selectedIndex-1].src;
	}
}