function setAllHeights() {
	// add calls to normalizeHeights for each set we're balancing
	// probably safest to move from innermost to outermost
	normalizeHeights(["c1", "c2", "c3"]);
}

function getTotalPadding(id) {
  var element = id; 
  totalPadding = parseInt($(element).css("paddingTop")) + parseInt($(element).css("paddingBottom"));
  if (!isNaN(parseInt($(element).css("borderTopWidth")))) {
    totalPadding = totalPadding + parseInt($(element).css("borderTopWidth"));
  }
  if (!isNaN(parseInt($(element).css("borderBottomWidth")))) {
    totalPadding = totalPadding + parseInt($(element).css("borderBottomWidth"));
  }
  return totalPadding;
}


function normalizeHeights(elements) {
  if (elements && !($(elements.length))) {
    return;
  }
  var tallest = 0;
  for (var i = 0; i < elements.length; i++) {
    var element = $("#" + elements[i]);
    if (element) {
			var domElement = element.get(0);
			if (domElement) {
				element.height('auto');
      	// IE7 seems to only be updating scrollHeight if div size changes on resize
				var elementScrollHeight = domElement.scrollHeight;
				if (elementScrollHeight > tallest) {
        	tallest = elementScrollHeight;
      	}
			}
    }
  }
  for (var i = 0; i < elements.length; i++) {
    var element = $("#" + elements[i]);
    if (element) {
			var newHeight = tallest - getTotalPadding(element) // + 40
			element.height(newHeight);
    }
  }
	// zero the margins and padding on the footer
	$("#footer").css("margin", "0");
	$("#footer").css("padding", "0");
}

$(document).ready(function() {
	// in theory, the load event fires *after* images are downloaded.
	// if we dont' wait for this, images missing their width/height
	// attrs will cause trouble.
	$(window).load(function () {
		setAllHeights();
	});
  $(window).resize(function() {
    setAllHeights();
  });
});