[jQuery] Is this syntax correct?

[Rick Faircloth]

I get no errors, but no response, either.
I tried just using $('#emailaddress').blur... without the "input",
but then I got a val undefined error.

<script>
        
     $(document).ready(function() {
                
          $('input #emailaddress').blur(function() {
                        
               if (this.val.length == 0)
               $('#emailerror').show(); 
          });    
     });
                        
</script>

Thanks,

Rick