I would like to have two date field in my Wordpress contact form 7. A start-date and an end-date. The fields will be datepickers from the "Contact Form 7 Datepicker" plugin. When visitor has selected a start-date he should only be able to select an end date that is 4 days later then the start-date.
How can I achieve this by only using the "contact form 7" form creator?
May be this plugin will help you. This plugin works along with CF 7
http://wordpress.org/plugins/contact-form-7-datepicker/
And you can add your own javascript for date manipulation after adding datepicker in CF 7.
Example:
This is the syntax I put in the "contact form 7".
And I added this code to the end of the functions file of the Wordpress theme.
Now the second date picker must be at least 4 days later then the first date picker.