ajax加载组件

{components:[{
 xtype:'viewport',
 layout:"border", 
 items:[{
  region:"north", 
  margins:"1 1 0 1", 
  height:62,
  autoLoad:{url:'header.html',scripts:true}
 },{
  region:"west",
  margins:"0 0 0 0", 
  border:false,
  width:182, 
  bodyStyle:"background-color:lightYellow",
  autoLoad:{url:'left.html',scripts:true} 
 },{
  xtype:'panel',
  id:"center",
  region:"center", 
  margins:"0 1 0 0", 
  border:false,
  autoScroll:true,
  bodyStyle:"background-color:#BEEBE6",
  autoLoad:{url:'frame.txt',scripts:true} 
 },{
  region:"south", 
  margins:"1 1 1 1", 
  frame:true, 
  height:30
 }]
}],success:true}