JavaScript works on Safari 3 but not on newer vers

问题:

The following JavaScript is working fine in older versions of Safari (Safari 3), but not on latest version of Safari.

Can you help me find the problem?

function loadframe(){
  var iframeEl = document.getElementById("ifrm");
  if(!iframeEl)
  {
    window.alert('hellooooooo');
    var el = document.createElement("div");
    el.innerHTML = '<iframe id="ifrm" width="0" height="0" src=\'<!--EP CLASS="com.epiphany.presentation.ServerURLWriter" ACTION="campaign_segment_load" TEMPLATE="campaign\\campaign_segments" -->\' onload="dw_display(\'ifrm\',\'segmentspn\')" ></iframe>';
    document.body.appendChild(el);
    return true;
  }
  return false;
}

回答1:

    function loadframe()
    {
       var iframeEl = document.getElementById("ifrm");
       if(!iframeEl)
       {
         var el = document.createElement('div');
         var e2 = document.createElement('iframe');
         e2.src ="http://google.com";
         e2.setAttribute('id',ifrm);
         e2.width= 80;      
         e2.height= 80;             
         document.body.appendChild(el);
         el.appendChild(e2);
         return true;
      }
      return false;
  }

This will work on all browser, As iframe is another element, we should add it using DOM's method.