Validation alert

[rallesaid]

It is possible that instead of the tooltip "required",


an alert "required" is displayed

[paramvir]

Alert can be shown in validation callback.

[rallesaid]

I resolve with this
//maxLen
{ type:function(ui){
                var value = ui.value;
                if(value.length > 50 ){
                    alert('some message');
                    return false;
                }
            }
        }

but I have other question.
when I put return false, the entered value is cleared, then I comment the line  //return false,the entered value remains in the cell but the alert is displayed 2 times,
how i can remain the entered value and return false?