function fixHeight() {
	var leftDiv = document.getElementById('left');
	var mainDiv = document.getElementById('main');
	var rightDiv = document.getElementById('right');
	var containerDiv = document.getElementById('container');
	var maxHeight = Math.max(leftDiv.offsetHeight, mainDiv.offsetHeight, rightDiv.offsetHeight)+'px';
	var maxHeight2 = Math.max(leftDiv.offsetHeight, mainDiv.offsetHeight, rightDiv.offsetHeight)+70+'px';
	leftDiv.style.height = maxHeight;
	mainDiv.style.height = maxHeight;
	rightDiv.style.height = maxHeight;
	containerDiv.style.height = maxHeight2;
}