extjs textarea回车换行提交读不到数据的问题

extjs textarea回车换行提交读不到数据的问题
我的目标是：在textarea可以输入很多文本，自动换行也好回车换行也好都能够提交读到数据。
    我的困难是：输入文本能够自动换行，这样可以正常提交读到数据；输入文本时回车换行就读不到数据了。//-----------04.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <title>04.form</title>
        <link rel="stylesheet" type="text/css" href="../../resources/css/ext-all.css" />
        <script type="text/javascript" src="../../adapter/ext/ext-base.js"></script>
        <script type="text/javascript" src="../../ext-all.js"></script>
        <script type="text/javascript">
Ext.onReady(function(){    // HtmlEditor需要这个
    Ext.QuickTips.init();    var form = new Ext.form.FormPanel({
        labelAlign: 'right',
        labelWidth: 50,
        width:600,
        title: 'form',
        frame: true,
url: '04_01_0111.jsp',
        items: [{
            layout: 'form',
            items: [{
                columnWidth:.7,
                xtype:'fieldset',
                checkboxToggle:true,
                title: '单纯输入',
                autoHeight:true,
                defaults: {width: 300},
                defaultType: 'textfield',
                items: [{
                    fieldLabel: '文本',
//vtype:'alpha',
//regex: /[0-9]/, 
                    name: 'text'
                }{
                    xtype: 'textarea',
width:100,
                    fieldLabel: '多行',
regex: /[^\n\r]/,
                    name: 'textarea'
                },{
                    xtype: 'hidden',
                    name: 'hidden'
                }]
            }]
        }],
        buttons: [{
            text: '保存' ,
handler: function() {
// var username=form.getForm().findField('text').getValue();
var username=form.getForm().findField('textarea').getValue();
Ext.Ajax.request({
url:'04_01_0111.jsp',
params:{name:username},
success: function(response, options) {  
   var responseArray = Ext.util.JSON.decode(response.responseText);                                                
   if(responseArray.success == true){ //用户名已经被注册                       
   Ext.Msg.alert('信息', response.responseText);
   }else{//用户名可以注册                       
   Ext.Msg.alert('信息', "error");
   }  
}  
}); }
        },{
            text: '读取'
        },{
            text: '取消'
        }]
    });    form.render("form");
});
        </script>
    </head>
    <body>
        <script type="text/javascript" src="../examples.js"></script>
        <div id="form" style="margin:20px;"></div>
    </body>
</html>
//-----------04_01_0111.jsp
<%@ page contentType="text/html;charset=utf-8"%>
<%
    request.setCharacterEncoding("UTF-8");
    response.setCharacterEncoding("UTF-8");    String text = request.getParameter("name");
   response.getWriter().print("{success:true,msg:'成功11',text:'A"+text+"#"+"'}");
%>