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Complete VBScript Reference
The IsDate function returns a Boolean value that indicates if the evaluated expression can be converted to a date. It returns True if the expression is a date or can be converted to a date; otherwise, it returns False.
Note: The IsDate function uses local setting to determine if a string can be converted to a date ("January" is not a month in all languages.)
Syntax
IsDate(expression)
| Parameter | Description |
|---|---|
| expression | Required. The expression to be evaluated |
Example 1
Legal dates:
<script type="text/vbscript">
document.write(IsDate("April 22, 1947"))
document.write("<br />")
document.write(IsDate(#01/31/10#))
</script>
document.write(IsDate("April 22, 1947"))
document.write("<br />")
document.write(IsDate(#01/31/10#))
</script>
The output of the code above will be:
True
True
True
Try it yourself »
Example 2
Illegal dates:
<script type="text/vbscript">
document.write(IsDate("#01/31/10#"))
document.write("<br />")
document.write(IsDate("52/17/2010"))
document.write("<br />")
document.write(IsDate("Hello World!"))
</script>
document.write(IsDate("#01/31/10#"))
document.write("<br />")
document.write(IsDate("52/17/2010"))
document.write("<br />")
document.write(IsDate("Hello World!"))
</script>
The output of the code above will be:
False
False
False
False
False
Try it yourself »
Complete VBScript Reference
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