Add and Find value in Multidimensional Array in JavaScript

<script type="text/javascript">
    window.onload = function () {
        var TotalTask = 5;
        var Completed_Task = 2;
        var Rejected = 1;
        var Pending = 1;
        var Uncomplete = 1;

        var multiArray = new Array(5);
        for (var i = 0; i < multiArray.length; i++) {
            multiArray[i] = new Array(2);
        }

        multiArray[0][0] = "Total Task";
        multiArray[0][1] = TotalTask;

        multiArray[1][0] = "Completed";
        multiArray[1][1] = Completed_Task;

        multiArray[2][0] = "Rejected";
        multiArray[2][1] = Rejected;

        multiArray[3][0] = "Pending";
        multiArray[3][1] = Pending;

        multiArray[4][0] = "Uncomplete";
        multiArray[4][1] = Uncomplete;

        alert(multiArray[0][0]); // alert 1st index 1st item i.e. Total Task
        alert(multiArray[0][1]); // alert 1st index 2nd item i.e. 5
        alert(multiArray[0, 0]); // alert 1st index i.e. Total Task,5
    }
</script>