Browser History

Javascript can access the history of the web browser through the history object. This object holds information about the URLs which have been visited both before and after the current one. Using the history object we are able to single step backwards and forwards through this list, and jump to any point.

The history object has four properties:

• history.length keeps track of the length of the history list.
• history.current is the value of the current history entry.
• history.next is the next entry in the list.  This is equivelent to pressing the forward button on the browser.  It is therefore quire likley that it will have no value.
• history.previous is the page before, equivelent to pressing the back button on the browser.

The history list may also be treated as an array. So we can access hiistory[0].

And finaly there are three methods:

• history.forward the same as history.next
• history.back the same as history.previous
• history.go the equivelent to pushing either the forward or back button a number of times. For example history.go(-3) is equivelent to pressing the back button 3 times.