Remove Duplicate elements from array, discover from

unique.js

Array.prototype.unique = function () {
	var arrVal = this;
	var uniqueArr = [];
	for (var i = arrVal.length; i--; ) {
		var val = arrVal[i];
		if ($.inArray(val, uniqueArr) === -1) {
			uniqueArr.unshift(val);
		}
	}
	return uniqueArr;
}