window.onresize = function()
{  setPage();
}

function getWindowHeight() 
{
  var windowHeight=0;

  if (typeof(window.innerHeight) == 'number')
  {  windowHeight = window.innerHeight;
  }
  else
  {  if (document.documentElement && document.documentElement.clientHeight)
     {  windowHeight=document.documentElement.clientHeight;
     }
     else
     {  if (document.body && document.body.clientHeight)
        {  windowHeight=document.body.clientHeight;
        }
     }
  }
  return windowHeight;
}

function setPage()
{
  var windowHeight=getWindowHeight();

  if (document.getElementById)
  {  if (windowHeight>0)
     {
        if (windowHeight>596)
        {  document.getElementById('fra').style.height=windowHeight + 'px';
           document.getElementById('vrt').style.height=(windowHeight-186) + 'px';
           document.getElementById('inf').style.height=(windowHeight-206) + 'px';
        }
        else
        {  windowHeight=596;
           document.getElementById('fra').style.height=windowHeight + 'px';
           document.getElementById('vrt').style.height=(windowHeight-186) + 'px';
           document.getElementById('inf').style.height=(windowHeight-206) + 'px';
        }
 
     }
  }
}


function init() 
{  setPage();
}