Deleting a window property in IE

Question

I can't find any information on this issue; why doesn't the following code work in IE?

window.x = 45;
delete window.x;
// or delete window['x'];

IE reports an "object doesn't support this action" error. Does it have anything to do with that iterating over window properties in IE issue?

Answer 1

I would do it this way:

    window[x] = undefined;
    try{
        delete window[x];
    }catch(e){}