Array.indexOf Support for IE

gistfile1.txt

// Issue: IE doesn't support Array.indexOf (!)
// Solution: Use this

if (!Array.indexOf){
    Array.prototype.indexOf = function(obj) {
        for (var i = 0; i < this.length; i++) {
            if (this[i] == obj) {
                return i;
            }
        }
        
        return -1;
    };
}