To validate the captcha we need to save the random text written to the captcha image somewhere and then check it at the form submissiontime.
为了对验证码进行检验，我们需要将验证码中的文本保存起来，然后在提交的时候进行检查是否一致。
2
For example, if we choose to do screen-by-screen validation (instead of the current single validation at submissiontime) we'll have to add a transaction per validation.
The view displays current time reports, buttons initiate the time entry form, and a wizard helps you manage the editing and submission of time reports to SAP (see figure 2).