var contents = $('left_contents');
	var set_val = "contents="+encodeURIComponent(contents.innerHTML);
	new Ajax.Request("/word_list.php",{
	method:'post',
	parameters: set_val,
	asynchronous:true,
	onSuccess:get_res,
	onFailure:error});

	function get_res(req){
		if($("side_contents")){
			$("yagipedia_menu").innerHTML = "";
			xml = req.responseXML;
			res = xml.getElementsByTagName("content")[0].firstChild.nodeValue;
			$("yagipedia_menu").innerHTML += res;
		}else{
			xml = req.responseXML;
			res = xml.getElementsByTagName("content")[0].firstChild.nodeValue;
			check_res = res.replace(/[\n]/g,"");
			if(check_res.length > 30){
				side_contents = '<div id="side_contents"><div id="yagipedia_menu">'+res+'</div></div>'
				$("right_contents").innerHTML = $("right_contents").innerHTML + side_contents;
			}
		}
	}

	function error(req){
		$('yagipedia_menu').innerHTML = "";
	}