Java blocking access to EMBED

Click here to try to change class attribute of EMBED element:
document.getElementsByTagName('embed')[0].className = 'green'

On successfull change, background-color of embed should change to green.

With Java enabled this is not possible. With Java disabled all is fine.

Some additional observations

• Creating new property for this element won't work too.
• Changing any attribute with this construct: element.attribute = 'value', won't work too
• Changing attribute with setAttribute WILL work regardless of Java status. Try with Java enabled