A number of people over on our Get Satisfaction community have asked how to add placeholder text to form fields. This is a greyed-out default value that will disappear as soon as your visitors start to type in the field.
Add the script
Paste in the following script:
Customize the field names and placeholder values
In the snippet above you'll see a list of fields at the top (first_name, last_name and email) with their associated placeholder text.
You'll need to change these to match the fields in your page that you want to give placeholders to. You can find these field names in the form builder, as shown in the following screenshot: