Getting Form Values To Create PHP Page Link?

I am very new to javascript, but I am trying to create a function that will get all the form values on the page and then create a link to a .php page with the form values passed using GET method. Basically its an update form to update a company's server information, which will then send the new and/or existing values to a .php page to update the DB. It seems as though after executing the IF statement, it breaks the for loop.

HTML Code:
<script type="text/javascript">
function GetFormValues() {
var elem = document.getElementById('server_form').elements;
theLink = '<a href="update_server_health.php?';
for(var i = 0; i < elem.length; i++) { .....