Javascript & IE 6.0.2800.1106 (Permission denied)

I have a script in SVG which has an error in IE 6.0.2800.1106
(Permission denied)
The script opens new window upon a 'rect' click.
 
Following code gives me an error of "Permission denied" :
 
   <script type="text/ecmascript"><![CDATA[    
     function open()
     {
       window.open('window.html','newWindow');   
     }
   ]]></script>
  <rect onclick="open()" fill="orange" x="27" y="22" width="13"
height="11"/>
    
When I tried this script within HTML  it worked fine.
When I tried this script within SVG with other version than IE
6.0.2800.1106 it worked fine.
Can somebody help me please?
 
Ivan