Sorting Multideminsional arrays
===

I have the following JavaScript array,

    var myArr= [{
		"key" : "Consumer Discretionary",
		"values" :[ 
                   [1146369600000, 26.425199957521],
                   [1138683600000, 27.38478809681],
                   [1141102800000, 27.371377218208], 
                   [1143781200000, 26.309915460827] 
                  ]}, 
        {
         "key" : "Consumer Staples",
         "values" :[
                    [1159588800000, 7.2800122043237], 
                    [1141102800000, 7.1187787503354], 
                    [1167541200000, 8.351887016482], 
                    [1146369600000, 8.4156698763993]
         }];

How can I sort the "values" of "key" Consumer Discretionary and then Consumer Staples in ascending order so it will look like 


Consumer Discretionary :-

    [1138683600000, 27.38478809681] 
    [1141102800000, 27.371377218208] 
    [1143781200000, 26.309915460827]
    [1146369600000, 26.425199957521]

Any help on this ?
Thanks in advance