code: function() {
  	
        var str_value;
        
        // StringField getValue (handles typeInvite and trim options)
        str_value = inputEx.NumberField.superclass.getValue.call(this);
        
        // don't return NaN if empty field
        if (str_value === '') {
           return '';
        }
        
        return parseFloat(str_value);
     }
docs: Return a parsed float (javascript type number)
  @return {Number} The parsed float