• number. The error number. Zero, if no number is provided.
• description. A string that describes the error. Empty, if no description is provided.

The following statement creates an instance of the Error object:

var myError = Error(31, "Fatal error has been detected. Failed in a consistency check. Please call your vendor.");

The Error object supports two properties, matching the arguments above: number and description. You can both read as well as set them. The following code prints a message, consisting of the error number and its description:

alert("Error No. " + myError.number + ":" + "\n" + myError.description);

We have added the constructor above to this tip, and now you can try and print both properties of myError.

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