61.
What is the property to access the first child of a node?

62.
What are the properties supporting CSS styles for a document element?

63.
The style property belongs to while of the following object?

64.
What is the purpose of the event handlers in the JavaScript?

65.
Which handler is triggered when the content of the document in the window is stable and ready for manipulation?

66.
When a program contains extensive use of event handlers, which of the following is necessary?

67.
What is the code snippet to find all container elements with class “reveal”?

68.
What is the code snippet to update the content of the timestamp element when the user clicks on it?

70.
What is the code snippet to change the class and let the stylesheet specify the details?