compare Dates

Comparing the “date” element of each format and exclude any “time” element. Then with both dates converted to milliseconds, simply compare the values. You could do something like this. If dates are equal it returns 0, if the first date is less that the second then return -1, otherwise return 1.

Javascript

function compareDates(milliSeconds, dateString) {
    var year,
        month,
        day,
        tempDate1,
        tempDate2,
        parts;

    tempDate1 = new Date(milliSeconds);
    year = tempDate1.getFullYear();
    month =  tempDate1.getDate();
    day = tempDate1.getDay();
    tempDate1 = new Date(year, month, day).getTime();

    parts = dateString.split("/");
    tempDate2 = new Date(parts[0], parts[1] - 1, parts[2]).getTime();

    if (tempDate1 === tempDate2) {
        return 0;
    }

    if (tempDate1 < tempDate2) {
        return -1;
    }

    return 1;
}

var format1 = 1381308375118,
    format2 = "2013/08/26";

console.log(compareDates(format1, format2));