var p_win = new Array()

function openpreview( startpage, windowName, windowOption ) {
  p_win[windowName]=window.open(startpage, windowName, windowOption )
  p_win[windowName].focus()
  setTimeout("p_win['"+windowName+"'].focus()",200)
}

function openorfocus( startpage, windowName, windowOption ) {
  if ( typeof( p_win[windowName] ) != 'undefined' ) {
    if (!p_win[windowName].closed) {
      p_win[windowName].focus()
      p_win[windowName].location.href=startpage
    }
    else
      openpreview(startpage, windowName, windowOption);
  }
  else
    openpreview(startpage, windowName, windowOption);
}

function openagb(startpage) {
  openorfocus(startpage,'ambipur_agb','resizable=yes,scrollbars=yes,status=no,location=no,menubar=no,toolbar=no,width=500,height=610')
}