The source code

    Ext.onReady(function(){
        Ext.get('mb1').on('click', function(e){
            Ext.MessageBox.confirm('Confirm', 'Are you sure you want to do that?', showResult);
        });

        Ext.get('mb2').on('click', function(e){
            Ext.MessageBox.prompt('Name', 'Please enter your name:', showResultText);
        });

        Ext.get('mb3').on('click', function(e){
            Ext.MessageBox.show({
               title: 'Address',
               msg: 'Please enter your address:',
               width:300,
               buttons: Ext.MessageBox.OKCANCEL,
               multiline: true,
               fn: showResultText,
               animEl: 'mb3'
           });
        });

        Ext.get('mb4').on('click', function(e){
            Ext.MessageBox.show({
               title:'Save Changes?',
               msg: 'You are closing a tab that has unsaved changes.
    Would you like to save your changes?',
               buttons: Ext.MessageBox.YESNOCANCEL,
               fn: showResult,
               animEl: 'mb4',
               icon: Ext.MessageBox.QUESTION
           });
        });

        Ext.get('mb6').on('click', function(){
            Ext.MessageBox.show({
               title: 'Please wait',
               msg: 'Loading items...',
               progressText: 'Initializing...',
               width:300,
               progress:true,
               closable:false,
               animEl: 'mb6'
           });

           // this hideous block creates the bogus progress
           var f = function(v){
                return function(){
                    if(v == 12){
                        Ext.MessageBox.hide();
                        Ext.example.msg('Done', 'Your fake items were loaded!');
                    }else{
                        var i = v/11;
                        Ext.MessageBox.updateProgress(i, Math.round(100*i)+'% completed');
                    }
               };
           };
           for(var i = 1; i < 13; i++){
               setTimeout(f(i), i*500);
           }
        });

        Ext.get('mb7').on('click', function(){
            Ext.MessageBox.show({
               msg: 'Saving your data, please wait...',
               progressText: 'Saving...',
               width:300,
               wait:true,
               waitConfig: {interval:200},
               icon:'ext-mb-download', //custom class in msg-box.html
               animEl: 'mb7'
           });
            setTimeout(function(){
                //This simulates a long-running operation like a database save or XHR call.
                //In real code, this would be in a callback function.
                Ext.MessageBox.hide();
                Ext.example.msg('Done', 'Your fake data was saved!');
            }, 8000);
        });

        Ext.get('mb8').on('click', function(){
            Ext.MessageBox.alert('Status', 'Changes saved successfully.', showResult);
        });

        //Add these values dynamically so they aren't hard-coded in the html
        Ext.fly('info').dom.value = Ext.MessageBox.INFO;
        Ext.fly('question').dom.value = Ext.MessageBox.QUESTION;
        Ext.fly('warning').dom.value = Ext.MessageBox.WARNING;
        Ext.fly('error').dom.value = Ext.MessageBox.ERROR;

        Ext.get('mb9').on('click', function(){
            Ext.MessageBox.show({
               title: 'Icon Support',
               msg: 'Here is a message with an icon!',
               buttons: Ext.MessageBox.OK,
               animEl: 'mb9',
               fn: showResult,
               icon: Ext.get('icons').dom.value
           });
        });

        function showResult(btn){
            Ext.example.msg('Button Click', 'You clicked the {0} button', btn);
        };

        function showResultText(btn, text){
            Ext.example.msg('Button Click', 'You clicked the {0} button and entered the text "{1}".', btn, text);
        };
    });