修改了验证码长度，方便辨认

application/models/LoginForm.php

@@ -47,7 +47,7 @@ class LoginForm extends Zend_Form
                 // First the type...  
                 'captcha' => 'Image',
                 // Length of the word...  
-                'wordLen' => 6,
+                'wordLen' => 4,
                 'fontsize'=>16,
                 'width' => 100,
                 'height' => 38,
@@ -73,7 +73,6 @@ class LoginForm extends Zend_Form
             array('Description'),
             array('HtmlTag', array('tag' => 'li', 'class'=>'submit-group')),
         ));
-		
 		*/
 		
 		$this->addElements(array($submit));