ExtJS: Removing and Readding a FormPanel into a Window - extjs3

Question

I'm having a problem where I would like to remove a FormPanel from a Window.
Here is my Form which is being loaded in a Window:
myForm = new Ext.FormPanel({
frame: true,
width: '100%',
id: 'myform',
layout: 'form',
autoHeight: true,
autoDestroy: false,
region: 'center',
monitorValid: true,
items: [{
xtype: 'textfield',
id: 'mytextfield',
fieldLabel: 'My Label',
}]
});
MyWindow = new Ext.Window({
title: 'MyWindow',
layout: 'auto',
resizable: false,
width: 717,
autoheight:true,
id:'mywindow',
closeAction:'hide',
closable: true,
items:[Ext.getCmp("myform")]
});
Now I want to remove this form and have to show another form, and I'm doing like this somewhere else:
MyWindow.removeAll();
MyWindow.add(Ext.getCmp("myAnotherForm"));
But this gives me error "Uncaught TypeError: Cannot read property 'events' of undefined" in ext-all-debug.js.
Is there anything, I'm missing here ?
Thanks.

Answer 1

You can remove the form and add another form by using the following code:
Ext.onReady(function() {
var btn = new Ext.Button({
id : 'button',
width : 100,
height : 30,
text : 'click me',
listeners : {
click : function(){
var myanother = myAnotherForm;
var anotherbtn = btn1;
Mywindow.removeAll();
Mywindow.add(myanother);
Mywindow.add(anotherbtn);
Mywindow.doLayout();
}
}
});
var btn1 = new Ext.Button({
id : 'button1',
width : 100,
height : 30,
text : 'Another button'
});
myAnotherForm = new Ext.FormPanel({
frame: true,
width: '100%',
id: 'myanotherform',
layout: 'form',
autoHeight: true,
autoDestroy: false,
region: 'center',
monitorValid: true,
items: [{
xtype: 'textfield',
id: 'mytextfield',
fieldLabel: 'My Another Label',
}]
});
myForm = new Ext.FormPanel({
frame: true,
width: '100%',
id: 'myform',
layout: 'form',
autoHeight: true,
autoDestroy: false,
region: 'center',
monitorValid: true,
items: [{
xtype: 'textfield',
id: 'mytextfield',
fieldLabel: 'My Label',
}]
});
var Mywindow = new Ext.Window({
title: 'MyWindow',
layout: 'auto',
resizable: false,
width: 317,
autoheight:true,
id:'mywindow',
closeAction:'hide',
closable: true,
items : [myForm,btn]
});
Mywindow.show();
});
The working sample for the above is follows:
http://jsfiddle.net/kesamkiran/MVewR/1/
* Click on 'click me' button then you will get the another form with another button.If you want to change only form,then you can remove the button.