setTall = function() {
	if (document.getElementById) { // Do you know the DOM?
		if (document.getElementById('column-left')) {
			var divs = 	new Array(	document.getElementById('columns'), 
									document.getElementById('column-left'), 
									document.getElementById('column-right'),
									document.getElementById('content-main')
						);
			var maxHeightToGet = 0;
			var maxHeight = 0;
	
			for (var i = 0; i < divs.length; i++) { // Get the height of the tallest column
				if (divs[i] && divs[i].offsetHeight > maxHeightToGet) {
					maxHeightToGet = divs[i].offsetHeight;
				}
			}
		
			if (maxHeightToGet <= 475) {
				maxHeight = 475;
			} else {
				maxHeight = maxHeightToGet;
			}
			
			for (var i = 0; i < divs.length; i++) { // set the height of the tallest column
				if (divs[i]) {
					if (divs[i].id == 'content-main') {
						if (maxHeightToGet <= 475) {
							maxHeight = 441;
						}
						else {
							maxHeight = maxHeightToGet - 34;
						}
					}
					divs[i].style.height = maxHeight + 'px';
				}
			}
		}
		
	}
}

addLoadEvent(setTall);