function validForm(userForm)
{
  var name = userForm.name.value;
  var email = userForm.email.value;
  var message = userForm.message.value;
  var option = userForm.option.value;
  
  var errname ="";
  var erremail="";
  var errmsg = "";

  if (name == "")
     errname = "Enter a name<br />";

  if (message == "")
     errmsg += "Enter a message <br />";
	 
  if (email == "")
     erremail += "Enter an email <br />"

//check if the email address is valid
  else
  {
  	   re =  /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?)$/; 

  	 if (!re.test(email))
	    erremail += "email is invalid"	
  }
  
  if (errname == ""  && errmsg =="" && erremail =="")
     return true;
  else
  {
  
  	 document.getElementById('errname').innerHTML = errname;	
     document.getElementById('errmsg').innerHTML = errmsg;
	 document.getElementById('erremail').innerHTML = erremail;	
	
	 
     return false;   
  }
}