Show product dimensions, if value is greater than zero

Hi all,
I'm trying to find a way to show product's dimensions, in product details page, only if dimesion's value is greater that zero. Here's the code I've got so far:

<span class="dim">
    <span class="dimtag"><%=GetLocaleResourceString("Products.Length")%>:</span>
    <span class="dimvalue"><asp:Literal runat="server" ID="lLength" Visible='<%# !String.IsNullOrEmpty(Eval("Length", "{0:0.##}").ToString()) %>'
        Text='<%# Eval("Length", "{0:0.##}")%>'></asp:Literal> cm</span>
</span>

<span class="dim">
    <span class="dimtag"><%=GetLocaleResourceString("Products.")%>:</span>
    <span class="dimvalue"><asp:Literal runat="server" ID="lWidth" Visible='<%# !String.IsNullOrEmpty(Eval("Width", "{0:0.##}").ToString()) %>'
        Text='<%# Eval("Width", "{0:0.##}")%>'></asp:Literal> cm</span>
</span>

<span class="dim">
    <span class="dimtag"><%=GetLocaleResourceString("Products.Height")%>:</span>
    <span class="dimvalue"><asp:Literal runat="server" ID="lHeight" Visible='<%# !String.IsNullOrEmpty(Eval("Height", "{0:0.##}").ToString()) %>'
        Text='<%# Eval("Height", "{0:0.##}")%>'></asp:Literal> cm</span>
</span>

I'd like to display each "dim" span element, only if the dimension's value inside is greater than zero. Any suggestions?