function getHtml(html_path){
	var html="";
	new Ajax.Request(html_path, {
		method: "get",
		parameters: "",
		asynchronous: false,
		onSuccess: function(transport){
			html = transport.responseText;
		},
		onFailure: function(transport){
			// xmlのロードエラー時
		},
		onException: function(transport){
			// xmlのロードエラー時
		}
	});
	return html;
}