Button与Submit调用前台与后台代码的方法

<div id="container_buttom" style=" text-align:center; margin:5px 0;" >  
    <input type="submit" id="buttonOK" runat="server" onclick="return Validate()"  onserverclick="buttonOK_Click"    
      class="mainbutton" value="确 定"/>  
    <input type="button" id="buttonQuit" runat="server" onclick="if(!TransferBack()) return;" onserverclick="buttonQuit_Click"   
     class="mainbutton" value="返 回" />  
</div>  

注意两个onclick的区别，还有如果有调用后台方法，一定要加runat="server"