FUNCTION:  CByte( ) 
Implemented in version 1.0
You can determine the expression subtype by using the function VarType( ).
CByte(Number)
The CByte function converts any number between 0 and 255 to the variant of subtypeByte.
Code:
<% anynumber=(9.876) %>
<% =CByte(anynumber) %> 
Output:
10 
Code:
<% anynumber=(255) %>
<% =CByte(anynumber) %> 
Output:
255