Simplify code and fix the spacing.

Author: NV

lib/clone.js

@@ -26,25 +26,14 @@ CSSOM.clone = function clone(stylesheet) {
 		return cloned;
 	}
 
-	var RULE_TYPES = {
-		1: CSSOM.CSSStyleRule,
-		4: CSSOM.CSSMediaRule,
-		//3: CSSOM.CSSImportRule,
-		//5: CSSOM.CSSFontFaceRule,
-		//6: CSSOM.CSSPageRule,
-		7: CSSOM.CSSKeyframesRule,
-		8: CSSOM.CSSKeyframeRule,
-		12: CSSOM.CSSSupportsRule
-	};
-
-	for (var i=0, rulesLength=rules.length; i < rulesLength; i++) {
+	for (var i = 0, rulesLength = rules.length; i < rulesLength; i++) {
 		var rule = rules[i];
-		var ruleClone = cloned.cssRules[i] = new RULE_TYPES[rule.type]();
+		var ruleClone = cloned.cssRules[i] = new rule.constructor();
 
 		var style = rule.style;
 		if (style) {
 			var styleClone = ruleClone.style = new CSSOM.CSSStyleDeclaration();
-			for (var j=0, styleLength=style.length; j < styleLength; j++) {
+			for (var j = 0, styleLength = style.length; j < styleLength; j++) {
 				var name = styleClone[j] = style[j];
 				styleClone[name] = style[name];
 				styleClone._importants[name] = style.getPropertyPriority(name);