function height_hack() {
	var elm1 = document.getElementById('left_side');
	var elm2 = document.getElementById('content');
	elm1.style.height = 'auto';
	elm2.style.height = 'auto';
	var x = elm1.offsetHeight;
	var y = elm2.offsetHeight;

	if (x>y)
		elm2.style.height = x + "px";
	else
		elm1.style.height = y + "px";
};