function checkEnquiry()
{
  	 
  if (document.enquiry.Email.value.length > 0)
          {
          	     
          if ((document.enquiry.Email.value.indexOf("@") == -1))
          {
           alert("Please enter a valid Email address, that contains an '@' and a '.'");
           return false;
          }
    
          if ((document.enquiry.Email.value.indexOf(".") == -1))
          {
           alert("Please enter a valid Email address, that contains an '@' and a '.'");
           return false;
          }
      } 
	  
  if (document.enquiry.Message.value.length < 1)
  	{
	 	   alert("Please enter a message.");
           return false;
	}
	
  if (document.enquiry.Name.value.length < 1)
  	{
	 	   alert("Please enter your name.");
           return false;
	}
	
  if (document.enquiry.Subject.value.length < 1)
  	{
	 	   alert("Please enter a Subject.");
           return false;
	}

// default (ok)
	return true;
}