What does the following code snippet do?

var a = document.getElementById('id1');
a.onclick = function1();

What's the output? var a = [1, 2, 3]; delete a[1]; alert(a[1]);

Which methods and properties can you use to change CSS class of an element?

Value of C? function a(){return a.caller;} function b(){return a();} c = b();

Assume that the header has the following code snippet: What's wrong with this code snippet?

Which function can be used to stop an event from propagating if you're using a W3C-compliant browser?

Consider the following code snippet: var myJSONObject = {'ircEvent': 'PRIVMSG', 'method': 'newURI', 'regex': '^http://.*'}; What is the best way to remove the property 'regex', so the result would be this code snippet? myJSONObject == {'ircEvent': 'PRIVMSG', 'method': 'newURI'};

The following are sample code on how to loop through JavaScript object literals with objects as members: Var validation_messages = { 'key_1' : { 'your_msg' : 'hello world' } , 'Key_2' : {'your_name' : 'billy', 'your_msg' : 'foo equals bar' } } Which are invalid native JavaScript codes?

Which will correctly split 'str'?

What's the output? Var container = { someKey: 3, someOtherKey: 'someObject', anotherKey: 'Some text' }; If ('someOtherKey: in container) { Alert(true); } Delete container[“someOtherKey”]; If (container[“someOtherKey”] === null) { Alert(false); } If (container[“someOtherKey”] === undefined) { Alert(true); } If (container.someOtherKey === Undefined) { Alert(false); } If (container.someKey === undefined) { Alert(true); } Delete container['someKey']; If (container.someKey === 3) { Alert(true); }

Consider the following code: Var vNew=new Date() Which options will return true?