/**
 * backOpacity plugin
 * Copyright (c) 2009 Nick Obrien (http://www.nickobrien.nl)
 * Licensed under the MIT License:
 * http://www.opensource.org/licenses/mit-license.php
 * 
 * Version: 0.9.2
 */
(function($){
	jQuery.fn.backOpacity = function(settings){
		// Default and argument settings
		settings = jQuery.extend({background: '#000000', opacity: 0.5}, settings);

		// Loop through each element given and add an opacity element
		jQuery(this).each(function(intIndex){
			// For fixing background element's positions/sizes these variables are needed
			var pt = parseInt($(this).css('paddingTop'));
			var pb = parseInt($(this).css('paddingBottom'));
			var pl = parseInt($(this).css('paddingLeft'));
			var pr = parseInt($(this).css('paddingRight'));
			var fixedleft = parseInt($(this).css('marginLeft'));
			var fixedright = parseInt($(this).css('marginRight'));

			// Element offset width
			var parentow = $(this).width();

			// Fixed variables
			var fixedwidth, fixedheight, fixedleft, fixedright = 0;

			// Calculate fixing positions/sizes
			fixedwidth = parentow + pl + pr;
			fixedheight = $(this).height() + pt + pb;

			// Add background element
			$(document.createElement('div')).width(fixedwidth).height(fixedheight).css({backgroundColor:settings.background, opacity:settings.opacity, position:'relative', marginLeft:fixedleft+'px', marginRight:fixedright+'px', left:0, top:0, bottom:0, zIndex:((10)+intIndex*10)}).insertAfter($(this));

			// Set positions for the content element
			$(this).css({width: parentow, position:'absolute', zIndex:((20)+intIndex*20)});
		});

		// Return
		return jQuery;
	};
})(jQuery);



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