function fn_description(){
var description=null;
Ext.Ajax.request({
url: top.SSF_CONTEXTPATH + "/appweb/knowledge/DocCategaryAction.do",
params:{
method:'getDocCategary',
categaryId: field_categaryId.getValue()
},
success : function(req,opt){
var result = Ext.util.JSON.decode(req.responseText);
description=result.root.categaryDescription;
// alert(description);
}
});
return description;
}
以上代码中 最后获取到的description为什么还是null,怎样解决,想大佬请教!