var win=null;
			
			function Begrip(id, w, h,scroll) {
				var winl = (screen.width - w) / 2;
				var wint = (screen.height - h) / 2;
				winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable';
				if (win != null) {
							
					win.close();
					
					win = null;
					
				} 
					
					win = window.open('./begrip.php?ID='+id, 'Begrip', winprops);
					
				if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
				}
		
			function closeWindow() {
		
				if (win != null) {
							
					win.close();
					
					win = null;
					
				} 
				
			}