I'm having trouble with WP stripping JS from my page content. I'm wanting to use the following code as part of my Mailchimp opt in, and the JS is getting stripped. It works in preview mode but the moment I update the page the code disappears. I've been searching for over an hour for a solution and can't find one!
<input id="mce-FNAME" class="required" name="FNAME" type="text" value="First name" onfocus="if(this.value==this.defaultValue)this.value='';" onblur="if(this.value=='')this.value=this.defaultValue;"/>