/*-------------------------------------------------------------------- 
 * 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 = $(this).height(); }
		});
		if (!px || !Number.prototype.pxToEm) currentTallest = currentTallest.pxToEm(); //use ems unless px is specified
		// for ie6, set height since min-height isn't supported
		if ($.browser.msie && $.browser.version == 6.0) { $(this).children().css({'height': currentTallest}); }
		$(this).children().css({'min-height': currentTallest}); 
	});
	return this;
};

$.fn.matchHeights = function(px) {
		var currentTallest = 0;
		var newMenuHeight = 0;
	
		if ( ( $('#col_1').height() - 10 ) > currentTallest ) { currentTallest = ( $('#col_1').height() - 10 ); }
		if ( $('#col_2').height() > currentTallest ) { currentTallest = $('#col_2').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 ($.browser.msie && $.browser.version == 6.0) { 

		if ( $.browser.version == 6.0 || $.browser.version == 7.0 || $.browser.version == 8.0) { 
			$('#col_1').css({'height': currentTallest}); 
			$('#col_2').css({'height': (currentTallest+10) }); 
			//if ( $('#col_2').height() == currentTallest ) { 
				newMenuHeight = ( $('#col_2').height() - ( $('#three_buttons').height() ) ); 
				$('#sidebar_nav').css({'height': (newMenuHeight) }); 
			//}
		}
		$('#col_1').css({'min-height': (currentTallest) }); 
		$('#col_2').css({'min-height': (currentTallest+10) }); 
//		if ( $('#col_2').height() == currentTallest ) { 
			newMenuHeight = ( $('#col_2').height() - ( $('#three_buttons').height() ) ); 
			$('#sidebar_nav').css({'min-height': (newMenuHeight - 25) }); 
//		}
	return ;
};

$.fn.defaultHeights = function(px) {
		var currentTallest = 65;
		var newMenuHeight = 35;
	

//		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 (  $.browser.version == 6.0 || $.browser.version == 7.0 || $.browser.version == 8.0 ) { 
			$('#col_1').css({ 'height': currentTallest }); 
			$('#col_2').css({ 'height': currentTallest }); 
			//newMenuHeight = ( $('#col_2').height() - ( $('#three_buttons').height() ) ); 
			$('#sidebar_nav').css({'height': (newMenuHeight) }); 
		}
		$('#col_1').css({ 'min-height': currentTallest }); 
		$('#col_2').css({ 'min-height': currentTallest }); 
		//newMenuHeight = ( $('#col_2').height() - ( $('#three_buttons').height() ) ); 
		$('#sidebar_nav').css({ 'min-height': (newMenuHeight) }); 

	return ;
};

$.fn.matchHomeHeights = function(px) {
		var currentTallest = 0;
		var newMenuHeight = 0;
	
		if ( $('#news').height() > currentTallest ) { currentTallest = $('#news').height(); }
		if ( $('#events').height() > currentTallest ) { currentTallest = $('#events').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 ($.browser.msie && $.browser.version == 6.0) { 
			//$('#events').css({'height': currentTallest}); 
			//$('#news').css({'height': currentTallest}); 
		}
		$('#events').css({'min-height': currentTallest }); 
		$('#news').css({'min-height': currentTallest }); 

	return ;
};

// 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 = $(this).width(); }
		});
		if(!px || !Number.prototype.pxToEm) currentWidest = currentWidest.pxToEm(); //use ems unless px is specified
		// for ie6, set width since min-width isn't supported
		if ($.browser.msie && $.browser.version == 6.0) { $(this).children().css({'width': currentWidest}); }
		$(this).children().css({'min-width': currentWidest}); 
	});
	return this;
};


/*-------------------------------------------------------------------- 
 * javascript method: "pxToEm"
 * by:
   Scott Jehl (scott@filamentgroup.com) 
   Maggie Wachs (maggie@filamentgroup.com)
   http://www.filamentgroup.com
 *
 * Copyright (c) 2008 Filament Group
 * Dual licensed under the MIT (filamentgroup.com/examples/mit-license.txt) and GPL (filamentgroup.com/examples/gpl-license.txt) licenses.
 *
 * Description: Extends the native Number and String objects with pxToEm method. pxToEm converts a pixel value to ems depending on inherited font size.  
 * Article: http://www.filamentgroup.com/lab/retaining_scalable_interfaces_with_pixel_to_em_conversion/
 * Demo: http://www.filamentgroup.com/examples/pxToEm/	 	
 *							
 * Options:  	 								
 		scope: string or jQuery selector for font-size scoping
 		reverse: Boolean, true reverses the conversion to em-px
 * Dependencies: jQuery library						  
 * Usage Example: myPixelValue.pxToEm(); or myPixelValue.pxToEm({'scope':'#navigation', reverse: true});
 *
 * Version: 2.0, 08.01.2008 
 * Changelog:
 *		08.02.2007 initial Version 1.0
 *		08.01.2008 - fixed font-size calculation for IE
--------------------------------------------------------------------*/

Number.prototype.pxToEm = String.prototype.pxToEm = function(settings){
	//set defaults
	settings = jQuery.extend({
		scope: 'body',
		reverse: false
	}, settings);
	
	var pxVal = (this == '') ? 0 : parseFloat(this);
	var scopeVal;
	var getWindowWidth = function(){
		var de = document.documentElement;
		return self.innerWidth || (de && de.clientWidth) || document.body.clientWidth;
	};	
	
	/* When a percentage-based font-size is set on the body, IE returns that percent of the window width as the font-size. 
		For example, if the body font-size is 62.5% and the window width is 1000px, IE will return 625px as the font-size. 	
		When this happens, we calculate the correct body font-size (%) and multiply it by 16 (the standard browser font size) 
		to get an accurate em value. */
				
	if (settings.scope == 'body' && $.browser.msie && (parseFloat($('body').css('font-size')) / getWindowWidth()).toFixed(1) > 0.0) {
		var calcFontSize = function(){		
			return (parseFloat($('body').css('font-size'))/getWindowWidth()).toFixed(3) * 16;
		};
		scopeVal = calcFontSize();
	}
	else { scopeVal = parseFloat(jQuery(settings.scope).css("font-size")); };
			
	var result = (settings.reverse == true) ? (pxVal * scopeVal).toFixed(2) + 'px' : (pxVal / scopeVal).toFixed(2) + 'em';
	return result;
};