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這個簡單的函數是用來顯示時間和更新每秒使用setInterval()
,時間顯示但不更新,我也嘗試從身體的onload調用調用函數,它是相同的。setInterval()定時器不工作
<script language="JavaScript" type="text/javascript">
var currentTime = new Date();
function currentTimeStrings()
{
var hours = currentTime.getHours();
var hoursToString = hours;
if (hoursToString>12)
{
hoursToString = hoursToString-1;
}
switch (hoursToString)
{
case 13:
hoursToString = 2;
break;
case 14:
hoursToString = 3;
break;
case 15:
hoursToString = 4;
break;
case 16:
hoursToString = 5;
break;
case 17:
hoursToString = 6;
break;
case 18:
hoursToString = 7;
break;
case 19:
hoursToString = 8;
break;
case 20:
hoursToString = 9;
break;
case 21:
hoursToString = 10;
break;
case 22:
hoursToString = 11;
break;
case 23:
hoursToString = 12;
break;
default:
hoursToString = hoursToString;
break;
}
var minutes = currentTime.getMinutes();
var seconds = currentTime.getSeconds();
document.getElementById("timeDisp").innerHTML=hoursToString + ':' + minutes + ':' + seconds;
}
setInterval(currentTimeStrings,1000);
</script>
現在,它的工作,但有一個問題:我還以爲外面並不重要,因爲它僅僅是一個全局變量。 – Reece
@ user3280654:它是全局的,可以被訪問,但是當你調用'var currentTime = new Date();'和'保持相同的值'時,它的值只會被設置一次,從不更新。 –