function popup(target_url,id,scrollbar,xsize,ysize) { popwin=window.open(target_url,id, "toolbar=no,location=no,resizable=no,status=no,scrollbars=" + scrollbar + ",menubar=no,width=" + xsize + ",height=" + ysize + ",left=" + ((screen.width/2)- xsize/2) + ",top=" + ((screen.height/2)- ysize/2)); popwin.focus(); }