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

  
  

   
   
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"); } });