Hi,

With code below I got loadmask for this:

Code:
var panel = Ext.create('Ext.ux.SimpleIFrame', {       
      id: 'loadmask',
      title: 'Timesheet',
      border: false,
      src: 'index.html',
      listeners: {
                load: function () {
                    Ext.getCmp('loadmask').unmask();
                },
                render: function () {
                    Ext.getCmp('loadmask').mask('Loading...');
                }
});
But when iframe is loaded code do not unmask.

Please help me.