Update Prototype to 1.7.3.0, core class array flatten, js update

- Prototype updated to 1.7.3 from 1.7.2
- Basic class has a array flatten with keys as flatten part (keys become
values)
- js update with aelx method

www/lib/CoreLibs/Basic.inc

@@ -1133,7 +1133,7 @@ class Basic
 	//         does NOT preserve keys
 	public static function flattenArray(array $array)
 	{
-		$return = array();
+		$return = array ();
 		array_walk_recursive(
 			$array,
 			function ($a) use (&$return) {
@@ -1143,6 +1143,22 @@ class Basic
 		return $return;
 	}
 
+	// METHOD: flattenArrayKey
+	// PARAMS: the array to flatten
+	// RETURN: flattened array with array keys as values in order of tree
+	// DESC  : note: the second parameter $return is automatically set
+	//         will loop through an array recursivly and write the array keys back
+	public static function flattenArrayKey(array $array, array $return = array ())
+	{
+		foreach ($array as $key => $sub) {
+			$return[] = $key;
+			if (count($sub) > 0) {
+				$return = Basic::flattenArrayKey($sub, $return);
+			}
+		}
+		return $return;
+	}
+
 	// METHOD: __mbMimeEncode
 	// WAS   : _mb_mime_encode
 	// PARAMS: string to encode, encoding to encode in