var Win=false;

function fenster(url, width, height, resizable, scrollbars, menubar, status)
 {
		if (!resizable) { var resizable="1"; }
		if (!scrollbars) { var scrollbars="yes"; }
		if (!menubar) { var menubar="yes"; }
		if (!status) { var status="yes" }

        	Win = window.open(url,"fenster",'width=' + width + ',height=' + height + ',resizable=' + resizable + ',scrollbars=' + scrollbars + ',menubar=' + menubar + ',status=' + status);
		Win.focus();
 }