TypeError:document.getElementById(...)爲null。 不知道爲什麼我得到這個錯誤。在Firebug中正常工作。getElementById(...)爲空。在Firebug中工作正常
function init() {
updateClock();
};
function updateClock ()
{
var currentTime = new Date ();
var currentHours = currentTime.getHours ();
var currentMinutes = currentTime.getMinutes ();
var currentSeconds = currentTime.getSeconds ();
// Pad the minutes and seconds with leading zeros, if required
currentMinutes = (currentMinutes < 10 ? "0" : "") + currentMinutes;
currentSeconds = (currentSeconds < 10 ? "0" : "") + currentSeconds;
// Choose either "AM" or "PM" as appropriate
var timeOfDay = (currentHours < 12) ? "AM" : "PM";
// Convert the hours component to 12-hour format if needed
currentHours = (currentHours > 12) ? currentHours - 12 : currentHours;
// Convert an hours component of "0" to "12"
currentHours = (currentHours == 0) ? 12 : currentHours;
// Compose the string for display
currentTimeString = currentHours + ":" + currentMinutes + " " + timeOfDay;
// Update the time display
document.getElementById("time").innerHTML = currentTimeString;
}
currentTimeString = "";
window.addEventListener("load", init(), false);
這裏是它是如何在HTML imlemented:
<body>
<p id="time"> </p>
</body>
你能提供一個http://jsfiddle.net我們可以重現錯誤嗎? –