getValidCssPropertyName.js

var getValidCssPropertyName = (function() {
    function camelize(str) {
        return str.replace(/-([a-z])/g, function($0,$1) { return $1.toUpperCase() });
    }
    function decamelize(str) {
        return str.replace( /[A-Z]/g, function($0) { return "-" + $0.toLowerCase() });
    }
    var tmpStyle = null;
    function getValidCssPropertyName(cssStr, forJS) {
        if (!cssStr) return '';
        if (cssStr == 'float') {
            if (!forJS) return 'float';
            else        return 'cssFloat'/*@cc_on && 'styleFloat' @*/;
        }
        var style = tmpStyle;
        if (style == null) {
            style = tmpStyle = document.createElement('div').style;
            setTimeout(function() { tmpStyle = null; }, 0);
        }
        var jsname = camelize(cssStr);
        if (jsname in style) return forJS ? jsname : decamelize(cssStr);
        jsname = jsname.charAt(0).toUpperCase() + jsname.slice(1);
        if ((     'O' + jsname) in style) return forJS ? ('O' + jsname) : ('-o-' + decamelize(cssStr));
        if ((   'Moz' + jsname) in style) return forJS ? ('Moz' + jsname) : ('-moz-' + decamelize(cssStr));
        if (('Webkit' + jsname) in style) return forJS ? ('Webkit' + jsname) : ('-webkit-' + decamelize(cssStr));
        return '';
    }
    return getValidCssPropertyName;
})();