ExtJs Ext.Ajax.request提交实现waitMsg效果

1.在请求之前加一个mask图层

var myMask = new Ext.LoadMask(Ext.getBody(), {msg:"Please wait..."});
myMask.show();

2.在回调函数里首先把图层隐藏掉

myMask.hide();
简单的示例如下
//gp为form表单
var gp=Ext.getCmp("deviceInterfereAttachmentsViewGridPanel");var myMask = new Ext.LoadMask(Ext.getBody(),{msg:"正在导入，请稍等..."});myMask.show();Ext.Ajax.request({url:"deviceAction!importDevInfo.action",method:"POST",params:{id:id},success:function(){myMask.hide();Ext.Msg.alert("消息","导入成功...");},failure:function(){
                myMask.hide();Ext.Msg.alert("消息","导入失败");}});