Detecting JScript from PHP ?

[Stinger51]

Is there any way within PHP of detecting whether a user has JavaScript enabled? I can't find any such in the on-line manual, nor on this forum.

I want to be able to implement a two-tiered form validation approach and need to know whether the user has JS enabled before I can do this.

The difference will lie in whether I give the user an input type = submit control, or else use a button control and have the Jscript submit the form.

For the latter, if JS is disabled, nothing will happen when the user clicks the "submit" button.

[pyro]

You could use something like this:

<script type="text/javascript">
document.write('<a href="#" onclick="document.forms[0].submit(); return false;">Submit</a>');
</script>
<noscript>
<input type="submit" name="submit" value="Submit">
</noscript>

[Stinger51]

What does the document.write line do, other than submit the form?

And if the user clicks the submit control, won't this still submit the form anyway (which is not what we want, we want JS to do this, but only if JS is enabled)?

Thanks for your help.

[pyro]

The document.write line writes out a link (can be changed to something else) which will submit the form, if clicked. This will only show up for user with JavaScript enabled. The submit button in the <noscript> tag will only show up for those without JavaScript enabled.

[Stinger51]

Gotta test this out! I never thought of using the "noscript" tag here to address this issue.

Thanks again!

[pyro]

You are very welcome... 🙂