innerHTML在setInterval上未更改

Question

In this javascript, "seconds left" should decrease every second but this do not happen. 在此javascript中，“剩余秒数”应每秒减少一次，但这不会发生。
innerhtml do not change the value for <span id='timer'> while innerHTML for <span id='id'> is working. 当<span id='id'> innerHTML ， innerhtml不会更改<span id='timer'>的值。

<script>
var lastdate=1373814606250;
var today=1373388292527;
var d,h,m,s;
function displayDate()
{
    today--;
    d=(lastdate-today)/86400000;
    h=(d-Math.floor(d))*24;
    m=(h-Math.floor(h))*60;
    s=(m-Math.floor(m))*60;
    document.getElementById("timer").innerHTML=Math.floor(d)+" Days "+Math.floor(h)+" hours "+Math.floor(m)+" minutes "+Math.floor(s)+" seconds";
    document.getElementById('id').innerHTML=today;
}
</script>
<body onload="setInterval('displayDate()',1000)">
<span id='timer'></span><br/>
<span id='id'></span>
</body>

See it Working here 看到它在这里工作

EDIT 编辑
Here today and lastdate is date in milliseconds. 这里的今天和最后的日期是毫秒。

Answer 1

I understood There was logical error in calculating seconds. 我了解在计算秒数时存在逻辑错误。
It should be 它应该是

today=today+1000;

Because of milliseconds not seconds 因为毫秒而不是秒

Answer 2

The innerHTML of the first span works too but the content never changes. 第一个范围的innerHTML也可以使用，但是内容永远不会改变。 Math.floor(d)+" Days "+Math.floor(h)+" hours "+Math.floor(m)+" minutes "+Math.floor(s)+" seconds" gives every time the same result. Math.floor(d)+" Days "+Math.floor(h)+" hours "+Math.floor(m)+" minutes "+Math.floor(s)+" seconds"每次给出相同的结果。

innerHTML在setInterval上未更改

问题描述

2 个解决方案

解决方案1
2 2013-07-09 17:13:57

解决方案2
1 已采纳 2013-07-09 17:14:20

innerHTML在setInterval上未更改

问题描述

2 个解决方案

解决方案1 2 2013-07-09 17:13:57

解决方案2 1 已采纳 2013-07-09 17:14:20

解决方案1
2 2013-07-09 17:13:57

解决方案2
1 已采纳 2013-07-09 17:14:20