JS: Compute deployed article images

gistfile1

/**
 * Copyright REZO ZERO 2012
 * 
 * This work is licensed under the Creative Commons Attribution-NoDerivs 2.0 France License. 
 * To view a copy of this license, visit http://creativecommons.org/licenses/by-nd/2.0/fr/
 * or send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.
 * 
 * Compute collection images height in order to make them enter in a given width
 * We need to know default images height and the given final width
 *
 * @file 
 * @copyright REZO ZERO 2012
 * @author Ambroise Maupate
 */
function computeDeployedArticleImages ( article )
{
	var startHeight = 300;
	var computedWidth = 0;
	var endWidth = 602;

	if ($(article).find(".img_container img").length > 1) {
		$(article).find(".img_container img").each(function (index) {
			computedWidth += $(this).actual("outerWidth",{includeMargin:true});
		});

		var ratio = computedWidth/startHeight;
		var endHeight = endWidth/ratio;
		$(article).find(".img_container img").css("height", endHeight+"px");
	}else {
		$(article).find(".img_container").css("height", "300px");
	}

	$(article).find(".img_container").slideDown(750);
}