function img_open( img, width, height )
{
  if( width  > (screen.width-100)  )  width = screen.width-100
  if( height > (screen.height-100) ) height = screen.height-100
	win = window.open( '/zn_image/?imagepath='+img, '', 'width='+width+',height='+height+',scrollbars=yes' );
}