Problem with hiding ECB buttons in Sharepoint

I have a serious trouble hiding ECB buttons in SharePoint 2010. I've read an article that says that I must create a copy of core.js file and comment the AddCheckInCheckOutMenuItems function. I've tried it and I have also referenced my custom core.js file. However it is still not working. It seems like Sharepoint is only calling the function from core.js or its somehow overwriting my function 开发者_运维问答. Anyone here with the same problem or anyone that could solve this issue ?

Thank you for your time .

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Please check the order in which you refer the js. It should be like :

<!--It is important to refer core.js even if you create and refer customcore.js-->
<SharePoint:ScriptLink language="javascript" name="core.js" Defer="true" runat="server"/>
<SharePoint:ScriptLink language="javascript" name="customcore.js" Defer="true" runat="server"/>

You can also check the jquery approach to hide ECB items in this post : http://extreme-sharepoint.com/2011/10/29/hide-menu-ecb/