function fold(id, url)
{
	var obj = document.getElementById(id);
	var obj_c = document.getElementById(id + '_c');

	if(obj){
		var iHTML = obj_c.innerHTML;
		var e_title = iHTML.substr(5, iHTML.length - 5);
		if(obj.style.display == 'block'){
			obj.style.display = 'none';
			obj_c.innerHTML = '続きを読む ' + e_title;
		}
		else{
			obj.style.display = 'block';
			obj_c.innerHTML = '続きを隠す ' + e_title;
		}
	}
	else{
		location.href = url;
	}
}