隐藏ribbon按钮

有三种方式：

1.#Ribbon\.DocLibListForm\.Edit\.Commit\.CheckIn-Large {display:none;}
2.<script type="text/javascript">

var elem = document.getElementById("Ribbon.DocLibListForm.Edit.Commit.CheckIn-Large");

elem.style.display ="none";


</script>

3.

?xml version="1.0" encoding="utf-8"?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <CustomAction
      Id="RemoveRibbonButton"
      Location="CommandUI.Ribbon">
    <CommandUIExtension>
      <CommandUIDefinitions>
        <CommandUIDefinition
Location="Ribbon.Documents.Share.AlertMe.Menu.ManageAlerts" />
</CommandUIDefinitions>
      <CommandUIHandlers>
        <CommandUIHandler
          Command="NewDefaultDocument"
           CommandAction="javascript:;"
           EnabledScript="false"
           />
 </CommandUIHandlers>
    </CommandUIExtension>
  </CustomAction>
</Elements>