What if the value passed in an ID Query is not a Numerical value?
Then we check to ensure it is a numerical value before allowing it to proceed.

Assign our Variables and our Values first.

<% getType = request.querystring("Type") getID = request.querystring("ID") if getType="One" then thePage = "Page Title" end if if getID = "1" then theID = "Page ID" end if%>

<table> <%if not IsNumeric(getID) then%> <tr><td colspan="2">Value is not a Numerical Value.</td></tr> <%else%> <tr><td><%=theID%></td><td><%=thePage%></td></tr> <tr><td><%=getID%></td><td><%=getType%></td></tr> <%end if%> </table>
The IsNumerica() function allows us to check if the value passed is a number or text value.
We are checking to see if it is NOT a number first, showing the error if it is text, and then showing the actual values if it is a numerical value.