while | if | dropdownlist in javascript

while | if | dropdownlist in javascript
        int i = 0;
        int indx = drpdwn.SelectedIndex;
        int var = 3;
        while (i <= var)
        {
            if (i == indx)
            {
              //  lbl.Text = "you have selected" + indx;
                one.Text =Convert.ToString(indx * 8);
                break;
            }
            else
            {
                i++;
            }
        }

 <table>
    <tr><td>
    <asp:DropDownList ID="drpdwn" runat="server" AutoPostBack="True"
            ontextchanged="drpdwn_TextChanged">
    <asp:ListItem Value="1">Java Programming</asp:ListItem>
    <asp:ListItem Value="2">C Programming</asp:ListItem>
    <asp:ListItem Value="3">Asp Programming</asp:ListItem>
    <asp:ListItem Value="4">c++ Programming</asp:ListItem>
    </asp:DropDownList>
    </td></tr>
    <tr><td>
    <asp:Label runat="server" ID="lbl"></asp:Label>
   
    </td></tr>
    </table>

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