You attempted to invoke the Date.prototype.toString or Date.prototype.valueOf method on an object of a type other than Date. The object of this type of invocation must be of type Date. For example:

	Copy Code
var o = new Object; o.f = Date.prototype.toString; o.f();

To correct this error

Only invoke the Date.prototype.toString or Date.prototype.valueOf methods on objects of type Date.

To correct this error

See Also

Reference

Concepts

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