var heights = new Array(1, 1);
function setTall() {
	if (document.getElementById) {
		// the divs array contains references to each column's div element. 
		// Replace 'center' 'right' and 'left' with your own. 
		// Or remove the last one entirely if you've got 2 columns. Or add another if you've got 4!
		var divs = new Array(document.getElementById('right'), document.getElementById('left-content'));
		var zipdivs = new Array(null, document.getElementById('content'));
		// Let's determine the maximum height out of all columns specified
		var maxHeight = 0;
		for (var i = 0; i < divs.length; i++) {
			heights[i] = divs[i].style.height;
			if (divs[i].offsetHeight > maxHeight) maxHeight = divs[i].offsetHeight;
		}
		
		// Let's set all columns to that maximum height
		for (var i = 0; i < divs.length; i++) {
			if (zipdivs[i] == null){
				divs[i].style.height = maxHeight + 'px';
	
				// Now, if the browser's in standards-compliant mode, the height property
				// sets the height excluding padding, so we figure the padding out by subtracting the
				// old maxHeight from the new offsetHeight, and compensate! So it works in Safari AND in IE 5.x
				if (divs[i].offsetHeight > maxHeight) {
					divs[i].style.height = (maxHeight - (divs[i].offsetHeight - maxHeight)) + 'px';
				}
			}else{
				heights[i] = zipdivs[i].style.height;
				if (divs[i].offsetHeight < maxHeight){
					zipdivs[i].style.height = (zipdivs[i].offsetHeight + (maxHeight - divs[i].offsetHeight)) + 'px';
					if (zipdivs[i].offsetHeight > maxHeight) {
						zipdivs[i].style.height = (maxHeight - (zipdivs[i].offsetHeight - maxHeight)) + 'px';
					}
				}
			}
		}
	}
}

window.onresize = function() {
	setTall();
}