function calculateTimeElapsed(startTime:Date,endTime:Date) {
    
    var sHours = startTime.getHours();
    var sMinutes = startTime.getMinutes();
     var sSeconds = startTime.getSeconds();
    var sMilliSeconds = startTime.getMilliseconds();

    var eHours = endTime.getHours();
    var eMinutes = endTime.getMinutes();
     var eSeconds = endTime.getSeconds();
    var eMilliSeconds = endTime.getMilliseconds();
    
    var sTimeSpan = (sHours*3600*1000) + (sMinutes*60*1000) + (sSeconds*1000) + (sMilliSeconds);
    var eTimeSpan = (eHours*3600*1000) + (eMinutes*60*1000) + (eSeconds*1000) + (eMilliSeconds);
    return eTimeSpan - sTimeSpan;
    
}