function HeightCorrection()
{
	var l = document.getElementById("left");
	var m = document.getElementById("middle");
	var r = document.getElementById("right");
	if(l.offsetHeight > m.offsetHeight && l.offsetHeight > r.offsetHeight)
	{
		m.style.height = l.offsetHeight + "px";
		r.style.height = l.offsetHeight + "px";
	}
	else if(m.offsetHeight > l.offsetHeight && m.offsetHeight > r.offsetHeight)
	{
		l.style.height = m.offsetHeight + "px";
		r.style.height = m.offsetHeight + "px";
	}
	else
	{
		l.style.height = r.offsetHeight + "px";
		m.style.height = r.offsetHeight + "px";
	}
}
window.onload = HeightCorrection;