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What is allow certain options mean, if it is fixed, hide the title column and create a new choice field. If you have dynamic or dependent options that vary with something else, then attach an event receiver using C# and perform a validation on itemadding event. Also if you use SharePoint Designer, there will be are ways to edit the default form to add ...


I've never seen a plugin however; its not too difficult to do this on your own. There is a JavaScript function in SharePoint called "PreSaveAction" that is fired just before the item is validated and saved. You can use this function to call your function. For example: function PreSaveAction(){ var itemTitle = $("input[title='GUID']").val(); if ...

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