VBScript IsNull Function
 Complete VBScript Reference
The IsNull function returns a Boolean value that indicates whether a
specified expression contains no valid data (Null). It returns True if
expression is Null; otherwise, it returns False.
Syntax
| Parameter |
Description |
| expression |
Required. An expression |
Example 1
dim x
document.write(IsNull(x) & "<br />")
x=10
document.write(IsNull(x) & "<br />")
x=Empty
document.write(IsNull(x) & "<br />")
x=Null
document.write(IsNull(x))
Output:
False
False
False
True
|
Complete VBScript Reference
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