The
Enumerator object provides the iterating mechanism you can
find in other OOP languages. It supports four methods: atEnd(), item(), moveFirst(), and moveNext(). The following example shows four links to our
four latest tips. These links, together with other links hidden in this tip, form a
collection, document.links. We loop through the items in the collection with
a for() loop. During each iteration we just pop an alert
box with the link's URL. The four methods that the Enumerator object supports are exactly what we need for this
for() loop:
 | We initialize the loop with the moveFirst()
method. |
| We check for the loop termination with the atEnd() method. |
| We step forward in the loop with the moveNext() method. |
| We print the link's URL with the item() method. |
This is the script that implements this loop:
linkEnum = new Enumerator(document.links);
for (linkEnum.moveFirst(); !linkEnum.atEnd(); linkEnum.moveNext()) {
alert(linkEnum.item());
} Here are the links and the button you need to click to invoke this script (the first four links are from somewhere else in this tip):
0010108 0010107 0010106 0010105