var timer
var Opacity = 0
function show() {
  oDiv.style.display = "block"
  oDiv.style.CURSOR = "wait"
  oDiv.style.height = screen.height;//document.body.scrollHeight
  Opacity = 0
  timer = window.setInterval("ShowDiv()", 1)//±ä»ÒËÙ¶È
}

function ShowDiv()
{
  if (Opacity == 50)
  {
    window.clearInterval(timer)
    return
  }
  Opacity = ( Opacity + 10 ) > 50 ? 50 : Opacity + 10
  oDiv.style.filter = "Alpha(Opacity="  + Opacity + ")"
  window.setInterval("HiddenDiv()", 7000)
}

function HiddenDiv()
{
  //if (Opacity == 0)
  //{
    window.clearInterval(timer)
    oDiv.style.display = "none"
    return
  //}
  //Opacity = (Opacity - 10 < 0) ? 0 : Opacity - 10
  //oDiv.style.filter = "Alpha(Opacity="  + Opacity + ")"  
}

function hide()
{
  timer = window.setInterval('HiddenDiv()', 1);
}