//Begin
<!--Start
function check(contact)
{
  
  

if (document.contact.firstname.value == "") {
    alert( "Please enter your First Name." );
    document.contact.firstname.focus();
    return false ;
  }

if (document.contact.lastname.value == "") {
    alert( "Please enter your Last Name." );
    document.contact.lastname.focus();
    return false ;
  }

if (document.contact.email.value == "") {
    alert( "Please enter an email address." );
    document.contact.email.focus();
    return false ;
  }


if (document.contact.comments.value == "") {
    alert( "Please enter your Message." );
    document.contact.comments.focus();
    return false ;
  }
  
  else (window.open('ThankYou.htm','thanks','screenx=100,left=100,screeny=0,top=0,scrollbars=no,resizable=no,width=200,height=200'))


  
}
//-->