function subWrapperHeight() {
   
	var currHeight = 0;
	var maxHeight = 0;
	pageColumns = new Array('rightColumn', 'leftColumn');
	
	for (i = 0; i < pageColumns.length; i++) {
		if (document.getElementById(pageColumns[i])) {
			document.getElementById(pageColumns[i]).style.height = "";
			currHeight = document.getElementById(pageColumns[i]).offsetHeight;
			if (currHeight > maxHeight) {
				maxHeight = currHeight;
			}
		}
	}
	
	for (i = 0; i < pageColumns.length; i++) {
		if (document.getElementById(pageColumns[i])) {
			if (document.getElementById(pageColumns[i]).offsetHeight < maxHeight) {
				document.getElementById(pageColumns[i]).style.height = maxHeight+"px";
			}
		}
	}
}