取得 CSS background HEX值

// 取得 BackgroundColor to Hex

(function($){
	$.cssHooks.backgroundColor = {
	    get: function(elem) {
	        if (elem.currentStyle)
	            var bg = elem.currentStyle['background-color'];
	        else if (window.getComputedStyle)
	            var bg = document.defaultView.getComputedStyle(elem,
	                null).getPropertyValue('background-color');
	        if (bg.search('rgb') == -1)
	            return bg;
	        else {
	            bg = bg.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
	            function hex(x) {
	                return ('0' + parseInt(x).toString(16)).slice(-2);
	            }
	            return '#' + hex(bg[1]) + hex(bg[2]) + hex(bg[3]);
	        }
	    }
	}
}(jQuery));
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// 取得 BackgroundColor to Hex
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​
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(function($){
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    $.cssHooks.backgroundColor = {
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        get: function(elem) {
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            if (elem.currentStyle)
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                var bg = elem.currentStyle['background-color'];
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            else if (window.getComputedStyle)
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                var bg = document.defaultView.getComputedStyle(elem,
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                    null).getPropertyValue('background-color');
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            if (bg.search('rgb') == -1)
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                return bg;
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            else {
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                bg = bg.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
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                function hex(x) {
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                    return ('0' + parseInt(x).toString(16)).slice(-2);
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                }
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                return '#' + hex(bg[1]) + hex(bg[2]) + hex(bg[3]);
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            }
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        }
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    }
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}(jQuery));