How do I submit an html form using Javascript but Validate it using PHP?

[Miranda E]

I made an HTML form and it can validate using a submit button.

How do I create a javascript submit link that will send my form to my validation page?

My Submit Link:
<a class="button" href="javascript:document.contact_form.submit()" onClick="document.contact_form.submit()" name="submit" id="submit"><span>Submit</span></a>

Full Submit Link without tags:
href="javascript:document.contact_form.submit()"

My <form> Tag:
<form id="contact_form" name="contact_form" method="post" action="to_contact_table.php">

Start of Validation page:
if (isset($_POST["submit"]))

If you Need anything else just tell me
Is there a way to submit a form using a php link instead of a javascript one?