Description:
+The preferenceForKey method allows a previously stored preference to be restored.
Syntax:
+[string] window.widget.preferenceForKey(String key)+
or
+[string] widget.preferenceForKey(String key)+
Arguments:
+key:
A text string specifying the name that represents the preference to be restored.
+ +Return value:
+A text string contains the preference value associated with the specified key.
+If the key does not exist, the return value is "undefined".
+Example code:
+// Check for the existence of searchKey
+if(widget.preferenceForKey('searchKey'))
+{
+ // get the searchKey from the preference
+ var searchArg = widget.preferenceForKey('searchKey');
+ // set the search argument to the search field
+ document.forms[0].searchKey.value = searchArg;
+}
+