Added name attribute to all input fields

Added name attribute to all input fields for compatability with jQuery form validation
Added links to jQuery Validate files
Added vars for sendQuote and contactUser

Added a place to store the checkbox status of "Send Quote?" and "Contact you?" on page three.
Added and intigrated jQuery Validate

Modified forms, CSS, and javascript pageChange function to accomidate jQuery validation. Setup validation on each form as needed and added a pageValidate function called from the pageChange function.
Note: also added function to dynamiclly update diameter from circumference on page 1.