使用javascript当前时间的日出日落时间图像

Question

var doc = document;clock({  twentyfour: !!twentyfour,  padzero: true,  refresh: 5000,  success: function(clock) {    doc.getElementById('time').innerHTML = clock.hour() + ":" + clock.minute();    document.getElementById('todate').innerHTML = clock.date() + ' ' + translate[current].month[clock.month()] + ' ' + clock.year();    document.getElementById('today').innerHTML = translate[current].weekday[clock.day()]  }});function mainUpdate(type) {  doc.getElementById("sunrise").innerHTML = weather.sunriseTimeFormatted;  doc.getElementById("sunset").innerHTML = weather.sunsetTimeFormatted;  var dtime = document.getElementById('time');  var dsunrise = document.getElementById('sunrise');  var dsunset = document.getElementById('sunset');  var sunriseI = document.getElementById('sunriseImg');  var sunsetI = document.getElementById('sunsetImg');  function sunriseI() {    if (dtime >= dsunrise) {      sunriseI.src = 'images/daytwilight.png';    } else {      sunriseI.src = 'images/blank.png';    }  }  function sunsetI() {    if (dtime == dsunset) {      sunsetI.src = 'images/nighttwilight.png';    } else {      sunriseI.src = 'images/blank.png';    }  }}<img onload="sunriseI()" id="sunriseImg" src="images/blank.png" /><img onload="sunsetI()" id="sunsetImg" src="images/blank.png" />不工作。我想在日出和日落时间放置暮光图像一段时间。当前时间 = 日落或日出。或者你可以给我看不同的替代品。谢谢你的帮助。