Please give me an example in JQuery to understand syntax similar as I code in ExtJS

Please give me an example in JQuery to understand syntax similar as I code in ExtJS

In ExtJs to create window I simply do this:  Please give me the same example in jQuery!!!
<script type="text/javascript">
Ext.onReady(function(){
    var win = new Ext.Window({
                layout:'fit',
                width:500,
                height:300,
                buttons: [{
                    text:'Submit',
                    disabled:true
                },{
                    text: 'Close',
                    handler: function(){
                        alert('Click on Close button');
                    }
                }]
            });
        win.show();
});
</script>