/** Hides or shows a part of the presented content. 
   For example to view details only when asked for. */
function switch_hide(id_hide) {
	if (document.getElementById('hidelink'+id_hide) != null) {
		document.getElementById('hidelink'+id_hide).blur();
		if (document.getElementById('hidediv'+id_hide).style.display != 'none') {
			document.getElementById('hidediv'+id_hide).style.display = 'none';
			document.getElementById('hideimg'+id_hide).src = 'style/bbs/images/plus.png';
		} else {
			document.getElementById('hidediv'+id_hide).style.display = '';
			document.getElementById('hideimg'+id_hide).src = 'style/bbs/images/minus.png';
		}
	}
}