var currentTallest = 0,
currentRowStart = 0,
rowDivs = new Array();

function setConformingHeight(el, newHeight) {
el.data("originalHeight", (el.data("originalHeight") == undefined) ? (el.height()) : (el.data("originalHeight")));
el.height(newHeight);
}

function getOriginalHeight(el) {
return (el.data("originalHeight") == undefined) ? (el.height()) : (el.data("originalHeight"));
}

function columnConform() {
$('.HalfWidth').each(function() {
var $el = $(this);
var topPosition = $el.position().top;

if (currentRowStart != topPosition) {
for(currentDiv = 0 ; currentDiv < rowDivs.length ; currentDiv++) setConformingHeight(rowDivs[currentDiv], currentTallest);
rowDivs.length = 0;
currentRowStart = topPosition;
currentTallest = getOriginalHeight($el);
rowDivs.push($el);

} else {
rowDivs.push($el);
currentTallest = (currentTallest < getOriginalHeight($el)) ? (getOriginalHeight($el)) : (currentTallest);
}
for (currentDiv = 0 ; currentDiv < rowDivs.length ; currentDiv++) setConformingHeight(rowDivs[currentDiv], currentTallest);
});
}
$(window).resize(function() {
columnConform();
});

$(function() {
columnConform();
});