我正在使用Java、JavaScript、HTML和Rest创建一个iPad应用程序。我有一个国家列表，想在应用程序的某个页面中显示为下拉列表。我尝试使用rest来填充此列表，但是当我运行应用程序时，下拉列表中没有任何内容，并且Safari报错。
Assertion failed: (anonymous function) :449
我遇到了这个错误，出现了8次，每次数字不同。
这是我正在使用的一些代码：
main.html
<div id="wrapper">
<div id="mainBackground">
<div id="stflogo"><img src="images/logo.png" width="200" height="186" alt="MyLogo logo" /></div>
<div id="formContainer">
<h1>Register Your Card</h1>
<form id="AccountDetailsForm" method="post" data-ajax="false">
<input id="tfscCardNumber" type="hidden" name="tfscCardNumber" class="readonly" minlength="2" maxlength="20" readonly="readonly" disabled="disabled"/>
<p><label id="firstNameLabel" for="firstName" class="displayBlockLabel RequiredField">First Name </label>
<input id="firstName" type="text" name="firstName" class="required" minlength="2" maxlength="20"/></p>
<p><label id="lastNameLabel" for="lastName" class="displayBlockLabel RequiredField"> Last Name </label>
<input id="lastName" type="text" name="lastName" class="required" minlength="2" maxlength="25"/></p>
<p><label id="address1Label" for="address1" class="displayBlockLabel RequiredField">Address 1 </label>
<input id="address1" type="text" name="address1" class="required" minlength="2" maxlength="40"/></p>
<p><label id="address2Label" for="address2" class="displayBlockLabel">Address 2</label>
<input id="address2" type="text" name="address2" maxlength="40"/></p>
<p><label id="cityLabel" for="city" class="displayBlockLabel RequiredField">Town / City </label>
<input id="city" type="text" name="city" class="required" minlength="2" maxlength="40"/></p>
<p> <label id="countyLabel" for="county" class="displayBlockLabel RequiredField">County / State </label>
<input id="county" type="text" name="county" class="required" minlength="2" maxlength="40"/> </p>
<p> <label id="postcodeLabel" for="postcode" class="displayBlockLabel RequiredField">Postcode / Zip </label>
<input id="postcode" type="text" name="postcode" class="required" minlength="2" maxlength="11"/> </p>
<p> <label id="countrySelectionLabel" for="countrySelection" class="displayBlockLabel RequiredField">Country </label>
<select id="countrySelection" class="required">
</select> </p>
<p><label id="telephoneLabel" for="telephone" class="displayBlockLabel RequiredField">Tel Number </label>
<input id="telephone" type="tel" name="telephone" class="tel number required" minlength="2" maxlength="12"/></p>
<p><label id="emailLabel" for="email" class="displayBlockLabel RequiredField">Email </label>
<input id="email" type="email" name="email" class="email required" minlength="2" maxlength="100"/></p>
<p><label id="confirmEmailLabel" for="confirmEmail" class="displayBlockLabel RequiredField">Confirm Email </label>
<input id="confirmEmail" type="email" name="confirmEmail" class="email required" minlength="5" maxlength="100"/></p>
<p><label id="passportNumberLabel" for="passportNumber" class="displayBlockLabel RequiredField">Passport Number </label>
<input id="passportNumber" type="text" name="passportNumber" class="required" minlength="3" maxlength="20"/></p>
<p class="tandcnotice">Please Ensure that you have read the Terms & Conditions and Privacy & security Policy</p>
<p class="tandcCheckbox">
<input type="checkbox" name="accepttandc" id="accepttandc" class="checkbox" />
<label for="checkbox" class="accepttandc">I have read the Terms & Conditions</label>
<p>
<input class="button" type="submit" value="Submit" data-role="button" data-theme="redbutton"/>
</form>
</div><!-- END OF FORM CONTAINER -->
</div>
</div>
....
appForm.js
$('#wrapper').live("pageshow", function() {
if ( $('#countrySelection')[0].length < 1){
$.mobile.loadingMessage = "Retrieving Countries";
$.mobile.showPageLoadingMsg();
Repository.load('details/countries/all', function(countries){
$.each(countries, function() {
$('#countrySelection').append('<option value="' + this.id + '">' + this.name + '</option>').selectmenu('refresh');
});
$.mobile.hidePageLoadingMsg();
});
}
});
$('#wrapper').live("pagecreate", function() {
$('#AccountDetailsForm select, #AccountDetailsForm input[type!=submit]').focus(function (){
focusScroller(this);
});
$('#AccountDetailsForm select, #AccountDetailsForm input[type!=submit]').blur(function (){
if ( $('#accountFormScrollView').data().scrolllistview._sy < $('#accountFormScrollView').data().scrolllistview._maxY){
$('#accountFormScrollView').data().scrolllistview.scrollTo(0, $('#accountFormScrollView').data().scrolllistview._maxY, 0);
}
});
});
$(window).resize(function (){
// Android Resize Event needed for the keyboard
});
var focusScroller = function(formElement){
$(window).scrollTop(0);
var elementLabel = "#" + formElement.id + "Label";
var offSetPosition = $(elementLabel)[0].offsetTop;
if(formElement.labels === undefined && formElement.id === "countrySelection"){
// ios4 quirk for select elements
offSetPosition = 100;
}
scrollTo(0,0,0);
$('#accountFormScrollView').data().scrolllistview.scrollTo(0, offSetPosition * -1, 0);
}
$('#wrapper"').live("pageshow", function() {
if (getTfscCardNumber() === ''){
$('#passportNumberLabel').css('display', 'none');
$('#passportNumber').css('display', 'none');
$('#passportNumber').attr("disabled", true);
}else{
$('#passportNumberLabel').css('display', 'block');
$('#passportNumber').css('display', 'block');
$('#passportNumber').attr("disabled", false);
}
loadForm($('#AccountDetailsForm')[0]);
});
我可以提供更多的代码，如果需要的话，但我确信其余的代码是没有问题的，如果有任何人想查看任何其他代码片段，请询问。
这个错误是什么意思？有人能看出哪里出了问题吗？