function start() {
  if (startflg==0) {
    top.right.location.href = myVideo[slidenum]
    setTimeout("showSlideShow()", myTime[slidenum])
    startflg=1
  }
    document.forms[0].display.value=hour+":"+min+":"+sec+":"+msec
    setTimeout("start()",1)
    msec++
    if(msec==65) {
      msec=0
      sec++
    }
    if(sec==60) {
      sec=0
      min++
    }
    if(min==60) {
      min=0
      hour++
    }

}