function unique(oldArray) {
        var nIndex,
            nLen = oldArray.length,
            aArr = [];
        for (nIndex = 0; nIndex < nLen; nIndex++) {
            if (!contains(aArr, oldArray[nIndex][1])) {
                aArr.push(oldArray[nIndex]);
            }
        }
        return aArr;
    }
Removes duplicated values in an array
@param oldArray
@returns {Array}