JavaScript Linked List Constructor

function test() {
	list = new List()
	list.insert('hex')
	list.insert('octal')
	list.insert('deca')
	//list.traverse()
} test()
alert(list.head.data)
alert(list.head.next.data)
alert(list.head.next.next.data)
alert(list.head.next.next.prev.data)
alert(list.head.next.prev.next.data)