function size()
{
  if(screen.width <= 800)
  {
   low()
  }
  else
  {
   all()
  }
}

function low()
{
  x = (screen.availWidth/2)-390;
  y = (screen.availHeight/2)-288;
  Help = window.open('lage/lage.htm','schloss','width=780,height=485,status=yes').moveTo(x,y);
} 

function all()
{
  x = (screen.availWidth/2)-385;
  y = (screen.availHeight/2)-360;
  Help = window.open('lage/lage.htm','schloss','width=780,height=485,status=yes').moveTo(x,y);
} 

    function openWindow(url,name,eigenschaften) { 
      window.open(url,name,eigenschaften);
    }