function ablak(url,nev,w,h,scroll){LeftPosition=(screen.width)?(screen.width-w)/2:0;TopPosition=(screen.height)?(screen.height-h)/2:0;settings='height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable';new_window=window.open(url,nev,settings)}