javascript : why missing name after . operator alert appear

Question

why in my script written why missing name after . operator when I've included a script like this

this.switch = function(){
      if (this.status == "enabled")
      {
         this.disable();
         this.stop();
      }
      else
      {
         this.enable();
      }
   }

the script is meant to divert status from enabled to disabled

Answer 1

switch is a reserved keyword (for ... switch statements!). If you imperatively, absolutely must use this name, write this['switch'] instead, but it will be annoying to use.

A common name for a function that turns something on/off is toggle().

Answer 2

switch is a javascript keyword. Try using a different name for your function.