Which of the following will implement a singleton pattern in JavaScript?

Correct way to stop setInterval() from calling a function in JavaScript?

How can properties be added to an object class?

Which choice will change the source of the image to 'image2.gif' when a user clicks on the image?

Which Array method in JavaScript runs a function on every item in the Array and collects the result from previous calls, but in reverse?

What would be the value of 'ind' after execution of the following code? var msg='Welcome to ExpertRating' var ind= msg.substr(3, 3)

function a(a1) {this.a1 = a1;} a.prototype.a2 = 'Prototype property'; var c = new a(); Which statement returns true?

What's the output? function test() { return 'Hello'; } alert(test());

Value of document.referrer if a user opens the page from a bookmark?

What's the output? function a() { alert('Outer function!'); return function(){ alert('Inner function!'); }; } var a = a(); a();

Result of type of (Infinity); statement?