How to adding custom message to loading map in grid? ExtJs 3.*

How to adding custom mess开发者_JS百科age to loading map in grid? ExtJs 3.*

var mask = new Ext.LoadMask(Ext.getBody(), {msg:"Please wait..."});

// Editor grid Panel
var editorGrid = new Ext.grid.EditorGridPanel
({
      store: store,
      cm: cm,
      renderTo: 'editor-grid',
      loadMask : mask
});

for more information :

LoadMask