Pre-fill form field via URL in html

Question

I am looking for a simple way to pre-fill a field in my contact form when ever a user clicks on a link that is given in some other page.

This is my contact form in h

Answer 1

You can retrieve your current url with window.location.href and then get the default message via a regular expression :

var msg = window.location.href.match(/\?setmessagefield=(.*)/);
document.getElementById("message").value = msg[1];