[JavaScript][ExtJS] Htmleditor validation (like allowBlank:false)

[JavaScript][ExtJS] Htmleditor validation

/* IsValid() 驗證htmleditor 的 value值是否空白，並會排除空白情況

*/  
  //validate htmleditor 
  function IsValid(value) {  
    var div = document.createElement('div'), text;
        div.innerHTML = value;
        text = div.textContent || div.innerText || "";
        return (text.replace(/^\s+|\s+$/gm, '') != "");
  }
  
  if(IsValid(Ext.getCmp('edit_Content').getValue())){
      Ext.getCmp('edit_Content').iframeEl.setStyle({ border: '1px solid #cf4c35' });  //red border style 
      edit_Content.iframeEl.dom.setAttribute('data-errorqtip', '請填寫內容');         //warning tooltip
  }
  else{
      Ext.getCmp('edit_Content').iframeEl.setStyle({ border: '' });
      edit_Content.iframeEl.dom.setAttribute('data-errorqtip', ''); 
  }