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equalheight = function(container){

	var currentTallest = 0,
	currentRowStart = 0,
	rowDivs = new Array(),
	$el,
	topPosition = 0;
	$(container).each(function() {

		$el = $(this);
		$($el).height('auto')
		topPostion = $el.position().top;

		if (currentRowStart != topPostion) {
			for (currentDiv = 0 ; currentDiv < rowDivs.length ; currentDiv++) {
				rowDivs[currentDiv].height(currentTallest);
			}
			rowDivs.length = 0; // empty the array
			currentRowStart = topPostion;
			currentTallest = $el.height();
			rowDivs.push($el);
		} else {
			rowDivs.push($el);
			currentTallest = (currentTallest < $el.height()) ? ($el.height()) : (currentTallest);
		}
		for (currentDiv = 0 ; currentDiv < rowDivs.length ; currentDiv++) {
			rowDivs[currentDiv].height(currentTallest);
		}
	});
}

$(window).load(function() {
  equalheight('.main article');
});


$(window).resize(function(){
  equalheight('.main article');
});

article {
	float: left;
	width: 23%;
	background: #ccc;
	margin: 10px 1%;
	padding: 1%;
}

@media all and (max-width: 900px) {
	article {
		width: 48%
	}
}