Codez un logiciel

Hi everyone, i am using Classipress with the Childtheme Eldorado and need to customize the "Post an Ad" form. 1. To show/hide some custom fields on the "Post form" of Classipress depending on what the User has selected on the first dropdown field in Step2 of "Post an Ad". For example: there are 4 custom fields C1, C2, C3 and C4 on the post form. The first custom field C1 on the post form has the dropdown values "0" and "1". What i need is that, when the value "0" is selected in C1, then only the custom fields C2 and C3 should be shown on the post form. When "1" is selected in C1, then, only "C4" should be visible on the post form. 2. Make the third Tab on the searchbar of the site working for searching an Ad. I already done the css design on the Tab; the only thing to do is to show the custom field values cp_city to the field "City" on the searchbar and make it woking for the searching. My dev site is: [login to view URL] Thanks in advance