jQuery.fn.supersleight = function(settings) {
	settings = jQuery.extend({
		imgs: true,
		backgrounds: true,
		shim: '../imgs/x.gif',
		apply_positioning: true
	}, settings);

	return this.each(function() {
		if (jQuery.browser.msie && parseInt(jQuery.browser.version, 10) < 7 && parseInt(jQuery.browser.version, 10) > 4) {
			jQuery(this).find('*').andSelf().each(function(i, obj) {
				var self = jQuery(obj);
				// background pngs
				if (settings.backgrounds && self.css('background-image').match(/\.png/i) !== null) {
					var bg = self.css('background-image');
					var src = bg.substring(5, bg.length - 2);
					var mode = (self.css('background-repeat') == 'no-repeat' ? 'crop' : 'scale');
					var styles = {
						'filter': "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + src + "', sizingMethod='" + mode + "')",
						'background-image': 'url(' + settings.shim + ')'
					};
					self.css(styles);
				};
				// image elements
				if (settings.imgs && self.is('img[src$=png]')) {
					var styles = {
						'width': self.width() + 'px',
						'height': self.height() + 'px',
						'filter': "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + self.attr('src') + "', sizingMethod='scale')"
					};
					self.css(styles).attr('src', settings.shim);
				};
				// apply position to 'active' elements
				if (settings.apply_positioning && self.is('a, input') && (self.css('position') === '' || self.css('position') == 'static')) {
					self.css('position', 'relative');
				};
			});
		};
	});
};