Create with external free wp-plugin fancy box plugin.
You need to install this plugin to be able to use the source code below.

Source code:


<a class="fancybox" href="#container_form_pop_up" rel="">open the form</a>

<div style="display:none;">
  <div id="container_form_pop_up" style="min-width:400px; padding:30px;">
      [your form]
  </div>
</div>

<a class="fancybox" href="#container_form_pop_up_2" rel="">open the form</a>

<div style="display:none;">
  <div id="container_form_pop_up_2" style="min-width:400px; padding:30px;">
      [your form]
  </div>
</div>

 

open a first form in a fancy box

open a second form in a fancy box