Extjs 3.3 tree以下的版本在IE10无法点击的解决办法

etAttribute : Ext.isIE ? function(name, ns){
   var d = this.dom,
   type = typeof d[ns + ":" + name];

   if(['undefined', 'unknown'].indexOf(type) == -1){
      return d[ns + ":" + name];
    }
 return d[name];
} : function(name, ns){
   var d = this.dom;
   return d.getAttributeNS(ns, name) || d.getAttribute(ns + ":" + name) || d.getAttribute(name) || d[name];
},

getAttribute: (function(){
   var test = document.createElement('table'),
   isBrokenOnTable = false,
   hasGetAttribute = 'getAttribute' in test,
   unknownRe = /undefined|unknown/;

   if (hasGetAttribute) {
    try {
        test.getAttribute('ext:qtip');
     } catch (e) {
       isBrokenOnTable = true;
    }

  return function(name, ns) {
    var el = this.dom,
    value;

   if (el.getAttributeNS) {
     value = el.getAttributeNS(ns, name) || null;
   }

  if (value == null) {
    if (ns) {
      if (isBrokenOnTable && el.tagName.toUpperCase() == 'TABLE') {
        try {
           value = el.getAttribute(ns + ':' + name);
         } catch (e) {
          value = '';
         }
      } else {
        value = el.getAttribute(ns + ':' + name);
    }
  } else {
    value = el.getAttribute(name) || el[name];
  }
 }
 return value || '';
 };
} else {
  return function(name, ns) {
     var el = this.om,
     value,
     attribute;

     if (ns) {
        attribute = el[ns + ':' + name];
        value = unknownRe.test(typeof attribute) ? undefined : attribute;
     } else {
      value = el[name];
     }
   return value || '';
   };
}
  test = null;
})(),