Question

我有这个脚本在我的网页上显示当前的日期和时间：

<script type = "text/javascript">

function startTime() {
var now = new Date();
var h=now.getHours();
var min=now.getMinutes();
var s=now.getSeconds();
var ampm=(now.getHours()>11)?"PM":"AM";
var d=now.getDay();
var y=now.getFullYear();
var mon=now.getMonth();
var da=now.getDate();
var endings=["st","nd","rd","th"];
var dayendings=[0,1,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,0,2,3,4,4,4,4,4,4,1];
var days=["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"];
var months=["January","February","March","April", "May", "June","July","August","September", "October", "Novemeber","Decemeber"];
if (h>12) {h-=12}
if (h==0) {h=12};
if (min<10) {min="0"+min}
if (s<10) {s="0"+s}
da+=endings[dayendings[da]];
if (da<10) {da="0"+da};
d=days[d];
mon=months[mon-1];
document.getElementById("time").innerHTML=d+", "+mon+" "+da+", "+y+" "+h+":"+min+":"+s+" "+ampm;
var tim = setTimeout("startTime()",1000);
}

</script>

但结果是这样的：

Friday, April NaN, 2012 6:37:36 PM

如何使April NaN, 2012正确？它必须是今天的日期May 25,2012

Answer 1

至少你应该改变

da+=endings[dayendings[da]];

到

da+=endings[dayendings[da - 1]];

因为现在它有一个一个一个的错误（da是1到31，但dayendings上的索引是0到30）。

如果“今天”是本月31日，这应立即解决您的问题。

dayendings中的值也需要修正，因为4在那里没有意义。

另外，你应该放弃something better的代码。你不喜欢这样吗？

function startTime() {
    document.getElementById("time").innerHTML =
        moment().format("dddd, MMMM Do, YYYY h:mm:ss A");
}

Answer 2

您的var dayendings=[0,1,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,0,2,3,4,4,4,4,4,4,1];包含一些4值。但是，var endings=["st","nd","rd","th"];的长度只有4，因此当您访问endings[4]时，它将返回undefined。

此外，您可能会收到一个错误，因为da位于1到31的范围内，这不是您dayendings的指标阵列。

Answer 3

看来您的计数器逻辑不正确。请尝试以下代码：

function makeArray() {
for (i = 0; i<makeArray.arguments.length; i++)
this[i + 1] = makeArray.arguments[i];
}
var now = new Date();
var h=now.getHours();
var min=now.getMinutes();
var s=now.getSeconds();
var ampm=(now.getHours()>11)?"PM":"AM";
var months = new makeArray('January','February','March','April','May',
'June','July','August','September','October','November','December');
var date = new Date(); 
var day = date.getDate();
var month = date.getMonth() + 1;
var yy = date.getYear();
var year = (yy < 1000) ? yy + 1900 : yy;
var endings=["st","nd","rd","th"];
var dayendings=[0,1,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,0,2,3,4,4,4,4,4,4,1];
var days=["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"];

document.write(days[date.getDay()] + " " + months[month]+ " " + day + ", " + year + " " + h + ":" + min + ":" + s + " " + ampm);

Answer 4

我在this jsfiddle中有一个相对简单的DateTime对象。可能有用吗？在您的情况下，使用此对象，此命令将以您想要的格式显示日期（除了PM / AM时间格式）

XDate({date:new Date,lang:'EN'}).format('WD, MM dd, yyyy, hh:mm:se0');
//=> Friday, May 25 2012, 13:05:03

Answer 5

首先生成此函数并另存为.js文件

function date_time(id) {
    date = new Date;
    year = date.getFullYear();
    month = date.getMonth();
    months = new Array('January', 'February', 'March', 'April', 'May', 'June', 'Jully', 'August', 'September', 'October', 'November', 'December');
    d = date.getDate();
    day = date.getDay();
    days = new Array('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday');
    h = date.getHours();
    if (h < 10) {
        h = "0" + h;
    }
    m = date.getMinutes();
    if (m < 10) {
        m = "0" + m;
    }
    s = date.getSeconds();
    if (s < 10) {
        s = "0" + s;
    }
    result = '' + days[day] + ' ' + months[month] + ' ' + d + ' ' + year + ' ' + h + ':' + m + ':' + s;
    document.getElementById(id).innerHTML = result;
    setTimeout('date_time("' + id + '");', '1000');
    return true;
}

然后在html页面上使用此代码显示当前时间和日期

<script type="text/javascript"> window.onload = date_time('date_time'); </script>

不要忘记页面头部的脚本标记：前

在javascript中显示当前日期和时间

5 个答案: