ActiveXObject & Wscript Problem

[rayzle16]

why is it this line of code doesn't work on me?
var shell = new ActiveXObject("WScript.shell");

i am very sure that ActiveXObject feature works on my browser.

function alert_user()
{
if (window.ActiveXObject)
{
alert("supported");
}
else
{
alert("does not support");
}
}
and this one works too...
var ExcelApp = new ActiveXObject("Excel.Application");

what the hell is wrong with my computer? someone please help.