The border-spacing property sets the distance between the borders of adjacent cells (only for the "separated borders" model).
Eg:
table
{
   border-collapse:separate;
   border-spacing:10px 50px;
}
 
Eg2:
<table style="border-spacing:15px;">
    <tr>
        <td>Logged in as:</td>
        <td><asp:Label ID="lblUserName" runat="server" Text="">
            <asp:HiddenField ID="hUserId" runat="server" Value="" />
        </asp:Label></td>
    </tr>
    <tr>
        <td>Region:<br /><br /></td>
        <td><asp:Label ID="lblRegion" runat="server" Text=""></asp:Label><br /><br /></td>
    </tr>
<table>
 
Outputs (table is outlined in red, using FireFox browser 'web developer' plugin):

 
Eg3:
<table style="border-spacing:5px 15px;">
...
 
Outputs:
