jQuery.equalHeights.js

/*-------------------------------------------------------------------- 
 * JQuery Plugin: "EqualHeights" & "EqualWidths"
 * by:	Scott Jehl, Todd Parker, Maggie Costello Wachs (http://www.filamentgroup.com)
 *
 * Copyright (c) 2007 Filament Group
 * Licensed under GPL (http://www.opensource.org/licenses/gpl-license.php)
 *
 * Description: Compares the heights or widths of the top-level children of a provided element 
 		and sets their min-height to the tallest height (or width to widest width). Sets in em units 
 		by default if pxToEm() method is available.
 * Dependencies: jQuery library, pxToEm method	(article: http://www.filamentgroup.com/lab/retaining_scalable_interfaces_with_pixel_to_em_conversion/)							  
 * Usage Example: $(element).equalHeights();
   						      Optional: to set min-height in px, pass a true argument: $(element).equalHeights(true);
 * Version: 2.0, 07.24.2008
 * Changelog:
 *  08.02.2007 initial Version 1.0
 *  07.24.2008 v 2.0 - added support for widths
--------------------------------------------------------------------*/

$.fn.equalHeights = function(px) {
	$(this).each(function(){
		var currentTallest = 0;
		$(this).children().each(function(i){
			if ($(this).height() > currentTallest) { currentTallest = $(this).height(); }
		});
    if (!px && Number.prototype.pxToEm) currentTallest = currentTallest.pxToEm(); //use ems unless px is specified
		// for ie6, set height since min-height isn't supported
		if (typeof(document.body.style.minHeight) === "undefined") { $(this).children().css({'height': currentTallest}); }
		$(this).children().css({'min-height': currentTallest}); 
	});
	return this;
};

// just in case you need it...
$.fn.equalWidths = function(px) {
	$(this).each(function(){
		var currentWidest = 0;
		$(this).children().each(function(i){
				if($(this).width() > currentWidest) { currentWidest = $(this).width(); }
		});
		if(!px && Number.prototype.pxToEm) currentWidest = currentWidest.pxToEm(); //use ems unless px is specified
		// for ie6, set width since min-width isn't supported
		if (typeof(document.body.style.minHeight) === "undefined") { $(this).children().css({'width': currentWidest}); }
		$(this).children().css({'min-width': currentWidest}); 
	});
	return this;
};