关于action获取extjs表单数据的有关问题

Ext.onReady( function() {        var form1 = new Ext.form.FormPanel({               //width:350,               frame:true,               renderTo:"form1",               //title:"FormPanel",               bodyStyle:"padding:5px 5px 0",               defaults:{width:200,xtype:"textfield"},//*****简化****//               items:[                       {                        fieldLabel:"gysxxb.gysmc",//文本框标题                        xtype:"textfield",//表单文本框                        name:"gysxxb.gysmc",                        id:"gysxxb.gysmc",                        width:200                      }                   ],               buttons:[{                   text:"确定",                   handler:function(){                       Ext.Ajax.defaultPostHeader += ";charset=utf-8";                                     Ext.Ajax.request({                                            //method:'POST',                                 //defaultHeaders :'UTF-8',                                         //form:'form1',                                            url:'../gysxxb/gysxxbAdd.icode',                                            method:'post',                                            success:function(form,response){                                                   Ext.Msg.alert('信息',response.responseText)},                                        failure:function(form,response){                                                         Ext.Msg.alert("错误","操作失败");                                                         }                                         });                   }                   },{                       text:"取消",handler:function(){alert(1);}}]            });    });