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This type of function is used when you have certain incremental values that you want to move real-world values into. It's often referred to as a snap-to or quantize function. In both implementations below, intNum is the number you're testing and intRn is the number that you want to move intNum to the nearest multiple of.

In VBScript:
<%
Function RoundTo(intNum, intRn)
    RoundTo= Int((intNum / intRn)+.5) * intRn
End Function
%>



In JScript:
<script language="JScript" runat="server">
    function JSRoundTo(intNum, intRn) {
        return Math.round(intNum / intRn) * intRn;
    }
</script>



Useage:
<%
    Response.Write RoundTo(12.4, 5) ' Writes 10
    Response.Write RoundTo(12.5, 5) ' Writes 15

' Negative numbers behave slightly differently:
    Response.Write RoundTo(-12.5, 5) ' Writes -10
    Response.Write RoundTo(-12.51, 5) ' Writes -15
%>