//### Popupfunktion zum anzeigen der Bilder aus dem Mediapool
function popup(url, width, height) {
	var PopWinPosX = (screen.availWidth/2)-width/2;
	var PopWinPosY = (screen.availHeight/2)-height/2;
	popWin = window.open(url, 'popWin', 'scrollbars=yes, menubar=no, status=no, toolbar=no, resizable=no, titlebar=no, width='+width+', height='+height+', left='+PopWinPosX+', top='+PopWinPosY);
	popWin.focus();
}

//### blendet je ein Element ein & aus
function showhide( showid, hideid ) {
	if ( showid == hideid && document.getElementById( showid ) ) {
		if ( document.getElementById( hideid ).style.visibility == 'hidden' ) {
			hideid = '';
		}
		else {
			showid = '';
		}
	}
  if ( document.getElementById( showid ) ) {
    document.getElementById( showid ).style.visibility = 'visible';
    document.getElementById( showid ).style.display = '';
  }
  if ( document.getElementById( hideid ) ) {
    document.getElementById( hideid ).style.visibility = 'hidden';
    document.getElementById( hideid ).style.display = 'none';
  }
}