document.write = dontwrite;
document.writeln = dontwrite;
window.write = dontwrite;
window.writeln = dontwrite;
window.parent.write = dontwrite;
window.parent.writeln = dontwrite;
window.top.write = dontwrite;
window.top.writeln = dontwrite;
this.write = dontwrite;
this.writeln = dontwrite;
self.write = dontwrite;
self.writeln = dontwrite;

function dontwrite(argument)
{return true;}

document.open = dontopen;
window.open = dontopen;
window.parent.open = dontopen;
window.top.open = dontopen;
this.open = dontopen;
self.open = dontopen;

function dontopen(argument)
{return true;}