The are many WordPress form plugins for creating email contact forms for your blog or website. Contact Form 7 is my favorite form plugin, allowing you to embed email contact forms directly in your WordPress pages or posts.
An embedded form is usually sufficient, but what if you want your email form to appear in a pop-up when your visitor clicks a Contact Us link? In order to create a pop-up you must use two WordPress plugins together: Easy FancyBox and Contact Form 7.
2. For simplicity, we’ll use the example email form already created in Contact Form 7. The Contact Form administration page displays the code you must cut and paste into your WordPress editor to generate the form.
3. Create a new page in WordPress. To include the email form, you have to paste the code contained in brackets from the Contact Form 7 administration page into your page. Ensure you paste the code exactly as it appears.
4. You now have your WordPress form appearing on a page in your site. Now, instead of being embedded in the page, you want it to pop-up and overlay the page when a visitor clicks a link. That’s where the Easy FancyBox plugin comes in. With Easy FancyBox, you can make any page element appear in a pop-up window. Edit your new page, click the HTML tab, and add the following HTML.
<a href="#contact_form_pop">Contact Us</a> <div style="display:none"> <div id="contact_form_pop">
5. You now have a link that launches your WordPress form in a pop-up window. Congratulations. You’ll probably want to do some CSS styling of the email form to ensure that the height and width are correct and that error messages are contain within the pop-up, but this should be enough to get you started.