Provides a callback parameter to the Thickbox function tb_remove(). The callback will be executed after Thickbox has left the screen.

tb_remove_cb.js

// Define this at the beginning of your JavaScript file.
// Use thusly: tb_remove( function(){ console.log( "Thickbox has left the building" )} );

var tb_removeOriginal = window.tb_remove;

window.tb_remove = function( callback ) {
	tb_removeOriginal();
	var obj = {};
    
    // Check that "callback" is actually a function.
	// @see: http://stackoverflow.com/questions/5999998/how-can-i-check-if-a-javascript-variable-is-function-type#7356528
	if ( callback && "[object Function]" === obj.toString.call( callback ) ) {

		// The event "tb_unload" is triggered after the animation.
		jQuery( "#TB_window" ).bind( "tb_unload", function( event ) {
			// Execute the callback.
			callback();
		});
	}
};