function toggle_login() {
		newheight = gethoehe($('e4_header'));
		if (newheight < "30") {
			$('e4_header').style.height = '32px';
			$('mye4_login').style.display = 'block';
			$('mye4_nickname').focus();
		} else {
			$('e4_header').style.height = '15px';
			$('mye4_login').style.display = 'none';
		}
	}
	
	function gethoehe(object) {
		var hoehe = object.offsetHeight;
		return hoehe;
	}