Attack of the IE Conditional Comment

// ———————————————————-
// If you’re not in IE (or IE version is less than 5) then:
//     ie === undefined
// If you’re in IE (>5) then you can determine which version:
//     ie === 7; // IE7
// Thus, to detect IE:
//     if (ie) {}
// And to detect the version:
//     ie === 6 // IE6
//     ie> 7 // IE8, IE9 …
//     ie <9 // Anything less than IE9
// ———————————————————-
var ie = (function(){
var undef, v = 3, div = document.createElement(‘div’);

while (
div.innerHTML = ‘<!–[if gt IE ‘+(++v)+’]><i></i><![endif]–>’,
div.getElementsByTagName(‘i’)[0]
);

return v> 4 ? v : undef;
}());