// Set items to an array (object) of strings
var items = new Array( "one", "two", "three" );

// Set itemsRef to a reference to items
var itemsRef = items;

// Set items to equal a new object
items = new Array( "new", "array" );

// items and itemsRef now point to different objects.
// items points to new Array( "new", "array" )
// itemsRef points to new Array( "one", "two", "three" )
alert( items != itemsRef );