Array.prototype.remove = function(from, to) {
	var rest = this.slice((to || from) + 1 || this.length);
	this.length = from < 0 ? this.length + from : from;
	return this.push.apply(this, rest);
}

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