If sData <> "" Then vbs script in jscript?

How to code this in jscript?

If sData <> "" Then
    If sData = "0" Then
        iColNum = runcolcount
    Else
        if IsNumeric(sData) Then
            Else
                Call zGen_PopupMsg("This is the Test Case being processed " + vbCrlf + sData, 3)
               Execute sData
       End if
    End If
End If