Which of the following is correct in order to send a HTML form post request using XMLHttpRequest?

Result of C given code? var a = '1'; b = 2 * a; c = typeof(b);

Value of C in given code? function a(version) {   this.version = version; } a.prototype.version = '1.8'; var b = new a('1.8.1'); delete b.version; var c = b.version;

Which statement defines a regular expression?

Which property contains user agent string of web browser?

Which statement is true?

Which is not a valid Date Object method in JavaScript?

What does the + sign in front of a function name mean in JavaScript?

Which is true about setTimeOut()?

Top most object in the object hierarchy?

Which will return all HTTP headers?