Contact form for a website

I have a relatively simple form on my website and I built the HTML portion of it but I need someone to create the PHP portion of it that will email the form input to my email address. If the visitor skips required fields, the form should not let him submit the message and instead display a pop-up "Please fill out required fields". If the form is filled out and submitted correctly, the message pops up saying "Message sent". The form can be seen here: [login to view URL] I would also like the HTML portion of the form rebuilt to streamline the HTML [login to view URL] use the existing page as a guideline of what it should look like. Thank you.