SharePoint Programming

Here is a short example of how to list content types associated with a list using Client Object model.

var _clientContext = new SP.ClientContext.get_current();

var _web = _clientContext.get_web();

var _list = _web.get_lists().getById(SP.ListOperation.Selection.getSelectedList());

var _ListCTColl = _list.get_contentTypes();

_clientContext.load(_list,'Title', 'Id');

_clientContext.load(_ListCTColl);

_clientContext.executeQueryAsync(Function.createDelegate(this, onListLoaded),