为什么这个HTML代码只有在我用PHP回显它时才能正常工作？

Question

I am using the Captcha made by Securimage.

When I write the following code in HTML section:

<tr>

<td><img id='captcha' src='/securimage/securimage_show.php' height='50' 
width='135' alt='CAPTCHA Image' /><br>

<a href='' onclick=\"document.getElementById('captcha').src
'/securimage/securimage_show.php?' + Math.random(); return false\">
[ Different Image ]</a></td>
<td><input type='text' name='captcha_code' size='20' maxlength='6' /></td>

<tr>

... And I click on "Different image" to change the captcha, the whole page refresh, thus losing all text entered into text fields.

But when I take all that code and put it into PHP echo statement, the captcha changes without refreshing the whole page (which is what I want)

Do you guys know why does this happen? This is really disturbing!

Thanks in advance

Answer 1

Try removing the backslashes from the onclick attribute. When you echo that from PHP, perhaps PHP melts them out.