EXT點擊按鈕彈出文本對話框

<link rel="stylesheet" type="text/css" href="../css/ext-all.css" />

<script type="text/javascript" src="../javascripts/ext-base.js"></script>
<script type="text/javascript" src="../javascripts/ext-all.js"></script>

<script language="javascript">
Ext.onReady(function(){

    Ext.get('check_refuse').on('click', function(e){
       {
            Ext.MessageBox.show({
               title: '拒絕理由',
               msg: '是否填寫拒絕理由﹕',
               width:300,
               buttons: Ext.MessageBox.OKCANCEL,
               multiline: true,
               fn: showResultTextNg,
               animEl: 'check_refuse'
          });
      } 
    });
   
    function showResultTextNg(btn, text){       
        myform.approve_note.value = text;
        if(myform.approve_note.value==""&&btn=='ok')
         {
          alert("請填寫拒絕理由");
      return false;
          }
        if(btn=='cancel'){
          myform.approve_note.value = "";
        }
          frm_submitonce(document.myform);
          formSub("_self",document.myform,"./MoldRetureApplyInfo.do?action=refuseMoldRetureInfo");
    };
   
});
</script>