add form method to form

system/form.php

@@ -253,6 +253,16 @@ class Form {
 	}
 
    /**
+    * Close a HTML form
+    * 
+    * @return string
+    */
+   public static function close()
+   {
+      return '</form>';
+   }
+
+	/**
 	 * Create a HTML input element.
 	 *
 	 * @param  string  $name