title: Auto-populate input form field from URL parameters
body: <p>I have a button on a woocommerce page (<code>http://.../product/abcd/</code>) that has a button "Book Appointments Now" that links to another page with form fields to submit (<code>http://.../booking-appointments/?id=1238&amp;sku=1</code>) which has <code>ProductID</code> and <code>SKU</code> on the URL of that product from the previous page. </p>
  
  <p>I want it to auto-populate the <code>ProductID</code> field automatically each time this page loads from the URL parameters. </p>
  
  <p>Any help is appreciated.</p>