Always always always ensure that the contact details on your website are both accurate and easy to find. Generally a good place to position them are on the top right of your website.
Ideally you want to add these as plain HTML and not as a fancy image. Although the image might look nicer, your visitors will not be able to cut and paste the details. A pet hate of mine is having to type out the email address or phone number because the design has been given more importance than the information.
