控件间隔如何设置

[taiful307]

<div>
<asp:button id="btnNew" runat="server" class="btn" Width="40" Text="新建" ></asp:button>
<asp:button id="ibtnDelete" runat="server" class="btn" Width="40" Text="删除"></asp:button>
<asp:button id="btnEdit" runat="server" class="btn" Width="40" Text="编辑" ></asp:button>
</div>

如何让这3个Button之间不没有间隔在网页上显示呢

[shankaipingo]

<div> 
<input id="btnNew" runat="server" type='button' 

class="btn" Width="40" value="新建" style="margin-

right:-10px"> </input> 
<input id="ibtnDelete" type='button' runat="server" 

class="btn" Width="40" value="删除"> </input> 
<input id="btnEdit" type='button' runat="server" 

class="btn" Width="40" value="编辑" style="margin-

left:-10px"> </input> 
</div>