Modifying and Show Ques. Randomly in the Quiz with navigation

I'm working on this quiz Fiddler demohttp://jsfiddle.net /natmit/7Du6N

i want to make some modification, please help! Here is the list of modification.

1. when I click on "Check Answer" button then if my answer is wrong then both correct and incorrect answer will showing and the explanation should comes with a popup with close button or delay with 1500ms.

2. Suppose I have 20 question in the quiz and I want to goto question No. 10 then I need a navigation menu which help me to go on specific question like question no.10.

3. How to show all Question and option Randomly.