extjs4 examples\shared 里面的弹窗提示

function doTip(title, content) {    var m = Ext.DomHelper.append(Ext.DomHelper.insertFirst(document.body, {id:'msg-div'}, true),    '<div name="code">.msg .x-box-mc {    font-size:14px;}#msg-div {    position:absolute;    left:35%;    top:10px;    width:300px;    z-index:20000;}#msg-div .msg {    border-radius: 8px;    -moz-border-radius: 8px;    background: #F6F6F6;    border: 2px solid #ccc;    margin-top: 2px;    padding: 10px 15px;    color: #555;}#msg-div .msg h3 {    margin: 0 0 8px;    font-weight: bold;    font-size: 15px;}#msg-div .msg p {    margin: 0;}