<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet href="chrome://browser/skin/" type="text/css"?>
<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" onload="setTimeout(boom,0,1)">

<splitter style="all: inherit;">
    <box/>
    <box/>
    <box/>
    <box/>
    <iframe id="a" src="aaa"/>
</splitter>

<script id="script" xmlns="http://www.w3.org/1999/xhtml">

    <![CDATA[//<![CDATA[

var doc = document;
function boom(i) {
  if (i>6)
    return;
  var x=doc.getElementsByTagName('*');
  if (x[i] && x[i+1]) {
    var temp = x[i+1].getAttribute('style');
    x[i+1].setAttribute('style', x[i].getAttribute('style'));
    x[i].setAttribute('style', temp);
  } else { 
    return;
  }
  i++;
  setTimeout(boom,50,i);
}

//]]>

    </script>

    </window>