Find the most frequent number in an array

function FindFrequentNumber()
{
    var strArray = document.getElementById('pr6').value.split(',');
    var intArray = new Array(strArray.length);
    for (var i = 0; i < strArray.length; i++) {
        intArray[i] = parseInt(strArray[i]);
    }
    //dictionary
    var dict = new Object();
    for (var i = 0; i < intArray.length; i++) {
        if (intArray[i] in dict) {
            dict[intArray[i]]++;
        }
        else {
            dict[intArray[i]] = 1;
        }
    }
    //sort
    var sortable = [];
    for (key in dict)
    {
        sortable.push([key, dict[key]])
    }
    sortable.sort(function (a, b) { return a[1] - b[1] });
    var result = sortable.pop();
    //print
    cons.innerHTML = "Most frequent number is "+result[0]+"("+result[1]+"times)";
}