How do I convert visitors to Contacts?

Javascript APIs are provided that will help you track visitors and convert them into Contacts.
Below are the API details:

• websense. convert: This API lets you convert a visitor to a contact. You can do this when the visitor submits their email address either in a webform or when signing up with you and logging in to your portal. You need to send your email address along with this API.
  • You can also send the pass name attribute along with the email. This will be added to the last name of the Contact.
• websense. event: This API helps you track visitor actions on your website. For example, you can track if a visitor has clicked on a particular button, or a link, etc. You need to pass your custom event name to the function call.