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( 
			new Array( 
				new Array( document.getElementById('leftColumn'), document.getElementById('content'), document.getElementById('rightColumnInner') )
			)
		);
		
		for (var i = 0; i < divs.length; i++) {
			// Let's determine the maximum height out of all columns specified
			var maxHeight = 0;
			for (var j = 0; j < divs[i][0].length; j++) {
				if (divs[i][0][j].offsetHeight > maxHeight) {
					maxHeight = divs[i][0][j].offsetHeight;
				}
			}
			
			// Let's set all columns to that maximum height
			for (var j = 0; j < divs[i][0].length; j++) {
				divs[i][divs[i].length-1][j].style.height = maxHeight + 'px';
				if (divs[i][0][j].offsetHeight > maxHeight) {
					divs[i][divs[i].length-1][j].style.height = ( parseInt(divs[i][divs[i].length-1][j].style.height) - (divs[i][0][j].offsetHeight - maxHeight)) + 'px';
				}
			}
		}
		
	}
}

window.onload = setTall;