docs/functions/this.html
This namespace contains functions that are used with the current item in the context menu.
this.type // Returns the type of the current item [item = 0, menu = 1, separator = 2]
this.checked // Returns true if the current item is checked
this.pos // Returns the position of the current item in the context menu
this.disabled // Returns true if the current item is disabled
this.sys // Returns true if the current item is a system item
this.title // Returns the title of the current item
this.id // Returns the ID of the current item
this.count // Returns the number of items in the context menu
this.length // Returns the length of the current item's title