我已经加载了一个外部JavaScript文件，并在其中放置了函数，但是在运行这些函数时，它会显示“未定义的函数”，但是当我将函数放在索引文件中时，它可以很好地工作。
为了调试这个，我在输入文档时编写了alert('entered');，并在运行和文档准备就绪时阅读了内容。两者都被执行。
U得到的错误是：
Uncaught ReferenceError: countdown is not defined
Uncaught ReferenceError: keepalive is not defined
我该如何解决这个问题？
来源：
// JavaScript Document
alert('entered js.js');
$(document).ready(function() {
alert('reading content');
function countdown() {
var ele = document.getElementsByClassName('countdown');
for (var i = 0; i < ele.length; ++i) {
var v = Math.floor(ele[i].getAttribute('ctime')) - 1;
if (v < 0) {
v = 0;
}
ele[i].setAttribute('ctime', v);
if (v > 86399) {
var sl = v;
d = parseInt(sl / 86400);
sl = sl % 86400;
h = parseInt(sl / 3600);
sl = sl % 3600;
m = parseInt(sl / 60);
s = parseInt(sl % 60);
var str = d + 'd ' + h + 't ' + m + 'm ' + s + 's';
} else if (v > 3599) {
var h = Math.floor(v / 60 / 60);
var m = Math.floor((v - (h * 3600)) / 60);
var s = v - (m * 60) - (h * 3600);
var str = h + 't ' + m + 'm ' + s + 's';
} else if (v > 59) {
var m = Math.floor(v / 60);
var s = v - (m * 60);
var str = m + 'm ' + s + 's';
} else if (v > 0) {
var str = v + 's';
} else {
var str = ele[i].getAttribute('ctext') || '0s';
}
if (v == 0) {
var act = ele[i].getAttribute('caction');
if (act != '') {
setTimeout(function() {
url(act);
}, 1000);
}
}
ele[i].innerHTML = str;
}
setTimeout('countdown()', 1000);
}
$( ".specialpost tr" ).click(function(e) {
var form = $(this).parents('form').attr('id');
var submitformId = $(this).data("submitid");
console.log(form);
console.log(submitformId);
$("#submitvalue").val(submitformId);
$( "#" + form ).submit();
});
(function ($) {
$.fn.countTo = function (options) {
options = options || {};
return $(this).each(function () {
// set options for current element
var settings = $.extend({}, $.fn.countTo.defaults, {
from: $(this).data('from'),
to: $(this).data('to'),
speed: $(this).data('speed'),
refreshInterval: $(this).data('refresh-interval'),
decimals: $(this).data('decimals')
}, options);
// how many times to update the value, and how much to increment the value on each update
var loops = Math.ceil(settings.speed / settings.refreshInterval),
increment = (settings.to - settings.from) / loops;
// references & variables that will change with each update
var self = this,
$self = $(this),
loopCount = 0,
value = settings.from,
data = $self.data('countTo') || {};
$self.data('countTo', data);
// if an existing interval can be found, clear it first
if (data.interval) {
clearInterval(data.interval);
}
data.interval = setInterval(updateTimer, settings.refreshInterval);
// initialize the element with the starting value
render(value);
function updateTimer() {
value += increment;
loopCount++;
render(value);
if (typeof(settings.onUpdate) == 'function') {
settings.onUpdate.call(self, value);
}
if (loopCount >= loops) {
// remove the interval
$self.removeData('countTo');
clearInterval(data.interval);
value = settings.to;
if (typeof(settings.onComplete) == 'function') {
settings.onComplete.call(self, value);
}
}
}
function render(value) {
var formattedValue = settings.formatter.call(self, value, settings);
$self.text(formattedValue);
}
});
};
$.fn.countTo.defaults = {
from: 0, // the number the element should start at
to: 0, // the number the element should end at
speed: 1000, // how long it should take to count between the target numbers
refreshInterval: 100, // how often the element should be updated
decimals: 0, // the number of decimal places to show
formatter: formatter, // handler for formatting the value before rendering
onUpdate: null, // callback method for every time the element is updated
onComplete: null // callback method for when the element finishes updating
};
function formatter(value, settings) {
return value.toFixed(settings.decimals);
}
}(jQuery));
function keepalive() {
$.ajax({
url : "http://www.smackface.net/check_user",
type : "POST",
dataType : 'json',
data : {
method : 'checkAlerts'
},
success : function(data, textStatus, XMLHttpRequest) {
var response = data;
if (!(response.login)) {
alert('You are now logging out');
} else {
if (response.messages > 0) {
$('#message_count').show().text(response.messages);
if ($('#message_count').text() != response.messages) {
$("#playsoundappend").html("<audio id=\"playsound\"><source src=\"http://soundbible.com/grab.php?id=1645&type=mp3\" type=\"audio/mpeg\"><source src=\"http://soundbible.com/grab.php?id=1645&type=mp3\" type=\"audio/mpeg\"></audio>");
document.getElementById('playsound').play();
$('title').text(response.notifications + " messages");
}
}
else {
$('#message_count').hide();
}
if (response.notifications > 0) {
$('#notification_count').show().text(response.notifications);
if ($('#notification_count').text() != response.notifications) {
$("#playsoundappend").html("<audio id=\"playsound\"><source src=\"http://soundbible.com/grab.php?id=1645&type=mp3\" type=\"audio/mpeg\"><source src=\"http://soundbible.com/grab.php?id=1645&type=mp3\" type=\"audio/mpeg\"></audio>");
document.getElementById('playsound').play();
$('title').text(response.notifications + " notifications");
}
}
else {
$('#notification_count').hide();
}
}
},
error: function(XMLHttpRequest, textStatus, errorThrown) {
console.log(XMLHttpRequest.responseText);
}
});
setTimeout('keepalive()', 10000);
}
$("#notificationLink").click(function()
{
$("#notificationContainer").fadeToggle(300);
$("#notification_count").fadeOut("slow");
$.ajax({
url : "http://www.smackface.net/check_user",
type : "POST",
dataType : 'json',
data : {
method : 'loadNotifications'
},
success : function(data, textStatus, XMLHttpRequest) {
var tpl = $("#notes").html();
var notification = Handlebars.compile(tpl);
$("#notificationsBody").html('');
$("#notificationsBody").append(notification(data));
},
error: function(XMLHttpRequest, textStatus, errorThrown) {
console.log(XMLHttpRequest.responseText);
}
});
return false;
});
$(document).click(function()
{
$("#notification_count").hide();
});
$("#notification_count").click(function()
{
return false;
});
keepalive();
countdown();
});
答案 0 :(得分：1)
你可以将函数本身传递给setTimeout：
setTimeout(countdown, 1000);
setTimeout(keepAlive, 1000);
您编写它的方式，必须超出$(document).ready(...的范围。当您将函数本身作为第一个参数传递时，它就在范围内。