Which is the topmost object in the object hierarchy

This array contains an entry for each history entry in source order; each array entry is a string containing a URL. These arrays are used to store information when you don't know ahead of time how many values there will be. The following table shows which properties of which objects have arrays as values. Reflects a form's elements such as Checkbox , Radio , and Text objects in source order. Reflects all the MIME types supported by the client either internally, via helper applications, or by plug-ins.

The document BODY then calls the two functions to produce the display shown in the following figure. Notice that the definition of bar uses single quotation marks inside double quotation marks. You must do this whenever you want to indicate a quoted string inside a string literal. Then the call to bar with an argument of 25 produces output equivalent to the following HTML:. Because HTML generally ignores new lines, there is no difference between write and writeln except inside tags such as PRE , which respect carriage returns.

Navigator versions 3. This is where the actual monitoring takes place. All objects that you add to a probe are monitored via that probe. In a failover cluster , there is an additional cluster probe that runs on all cluster nodes.

All devices that you create on the cluster probe are monitored by all cluster nodes, so data from different perspectives is available and monitoring continues even if one of the cluster nodes fails. You can add additional probes and remote probes to your configuration to also monitor remote devices from outside your network. For more information, see section Add Remote Probe. On each probe, there are one or more groups that have structural purposes. Use groups to arrange similar objects so that they inherit the same settings.

To a group, you add devices. You can arrange your devices in different nested groups to reflect the structure of your network. Here you can see a sample configuration of a device tree with the local probe, several groups, devices, and their sensors:. Object Hierarchy in the Device Tree. You can add devices that you want to monitor to each probe or group. Each device in your configuration represents real hardware or a virtual device in your network, for example:.

This way, you can get a more detailed overview when you use a large number of sensors or you can use different device settings for different groups of sensors. If you want to write a script with the flexibility to use either W3C DOM or IE 4 DOM depending on their availability, then you can use a capability-testing approach that first checks for the existence of a method or property to determine whether the browser has the capability you desire.

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