1 var imageStyleResult = new Ext.form.FieldSet({
 2     title:‘预览‘,
 3     height:100,
 4     items:[
 5         {
 6             id:‘showFraction‘,
 7             xtype: ‘box‘, //或者xtype: ‘component‘,  
 8             autoEl: {  
 9                 tag: ‘img‘
10             }
11         }        
12     ]
13         
14 });

1 <meta http-equiv="Expires" CONTENT="0">
2 <meta http-equiv="Cache-Control" CONTENT="no-cache">
3 <meta http-equiv="Pragma" CONTENT="no-cache">

 1 $.ajax({
 2             type: "GET",
 3             url: "InsertSurfaceRoughnessWord.js",
 4             dataType: "text",
 5             beforeSend :function(xmlHttp){
 6                 xmlHttp.setRequestHeader("If-Modified-Since","0");
 7                 xmlHttp.setRequestHeader("Cache-Control","no-cache");
 8 
 9             }
10         });