function setContentHeight() {
	cnt = document.getElementById('content');
	lh = document.getElementById('left').offsetHeight;
	rh = document.getElementById('right').offsetHeight;
	
	if (lh >= rh) 
	  rh = lh;
	else
	  lh = rh;
		
	if (cnt.offsetHeight < lh)
	  cnt.style.height = lh + 'px';
}