var blnDOM = false, blnIE4 = false, blnNN4 = false; 

if (document.layers) blnNN4 = true;
else if (document.all) blnIE4 = true;
else if (document.getElementById) blnDOM = true;

function getKeycode(e)
{

var tmp=0;

  if (blnNN4)
  {
    var NN4key = e.which
    tmp = NN4key;
  }
  if (blnDOM)
  {
    var blnkey = e.which
    tmp = blnkey;
  }
  if (blnIE4)
  {
    var IE4key = event.keyCode
    tmp = IE4key
  }

  if(tmp==37 || tmp==100){	//venstre
    click_left();
  }
  else if(tmp==39 || tmp==102){	//hoejre
    click_right();
  }
  else if(tmp==38 || tmp==104){	//op
  	//show_hide('page3','page4');
  }


}

document.onkeydown = getKeycode
if (blnNN4) document.captureEvents(Event.KEYDOWN)