Someone

var border = new Ext.Panel({
    title: 'Border Layout',
    layout:'border',
    items: [{
        title: 'South Panel',
        region: 'south',
        height: 100,
        minSize: 75,
        maxSize: 250,
        margins: '0 5 5 5'
    },{
        title: 'West Panel',
        region:'west',
        margins: '5 0 0 5', 
        cmargins: '5 5 0 5',
        width: 200,
        minSize: 100,
        maxSize: 300
    },{
        title: 'Main Content',
        region:'center',
        margins: '5 5 0 0'
    }]
});