Javascript check if a variable is the window

Question

do you know a good way to check if a variable is the window object in javascript? I tried with:

var variable=window;
Object.prototype.toString.call(variable);

In Firefox it returns "[object Window]" but in IE "[object Object]" so that's not the right way. Do you know an accurate way to check it?

Answer 1

Found this in AngularJS source code. A one liner and bang on target.

return variable && variable.document && variable.location && variable.alert && variable.setInterval;