这是在Extjs 中插入html 控件label！
 html: "<div><label id=‘howMany‘>您共选中了</label><br/></div>"
获取label值：document.getElementById(‘howMany‘).innerText
赋值label值：document.getElementById(‘howMany‘).innerText = "这是赋值";
            document.getElementById(‘howMany‘).innerHTML

var westPanelForm = new Ext.form.FormPanel({    id: ‘westPanelForm‘,    width: 200,    region: ‘west‘,    border: false,    height: 340,    frame: true,    layout: ‘form‘,    items: [    {        layout: ‘column‘,        items: [{            layout: ‘form‘, width: 260, items: [{                baseCls: ‘x-plain‘,                border: false,                height:30,                html: "<div><label id=‘howMany‘>您共选中了</label><br/></div>"            }]        }]    }, {        layout: ‘column‘,        items: [gridPanelMd]    }    ]});