Display form field depending on checkbox value

[elmas156]

I know that there is a way to this with javascript, but I don't know how it would work.  I am much more familiar with php so I figured I would ask here to see if anyone might have a good php solution.

 

I'm trying to have a form text field display depending on whether or not the user checks a specific box, but I'm not sure where to start.  I've searched around but I didn't find anything that would help.  Basically I want to have a checkbox that asks if the user would like to link their account to an email address.  If the checkbox is selected, a textbox will then appear on the page for them to enter an email address.  Can anyone point me in the right direction on where to start?  Thanks for your help.

[mens]

Using Javascript would be your best solution, and less time consuming on your part.

By adding an onclick property to the checkbox, you can alter the display properties of a specific input element causing it top appear.

 

The back-end of this, would be simple: if the specific checkbox is selected validate the input element - else, don't.

 

This can be done with PHP, sure. But the user will need to submit the form, and you need to validate it and generate the HTML for the input element; and then output it... again.

[elmas156]

Thanks for the reply.  Do you know of anywhere I can find a good tutorial on how to do this?  I don't use javascript much at all and I am very limited in my knowledge in it.  Thanks again for your help.

[mens]

I can't think of any tutorials for this specific task, but I would suggest reading up on jQuery. It makes working with Javascript much easier.

Here's a guide on checkbox/radio manipulation with jQuery: http://www.techiegyan.com/2008/07/09/using-jquery-check-boxes-and-radio-buttons/