function startujem()
{
  setHeight();
}

function setHeight()
{
    if (document.getElementById('cuppage')!=null)
	{
	    gb = document.getElementById('golfbox');
	    tb = document.getElementById('tenisbox');

	    if (gb.offsetHeight < tb.offsetHeight)
		h = tb.offsetHeight+"px";
	    else
		h = gb.offsetHeight+"px";

	    tb.style.height = h;
	    gb.style.height = h;
	}

}

window.onload = startujem;