我试图使 blankWindow 类可拖动，并且句柄必须 #blankWindowHandle。我下载了自定义下载的 JQuery UI，但没有任何效果。它仍然只是突出显示句柄元素顶部的文本：
<!DOCTYPE html>
<html>
<head>
<title>ModularWiz_B</title>
<link rel="stylesheet" href="style.css" type="text/css" />
<link rel="apple-touch-icon-precomposed" href="images/icon.png">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="mobile-web-app-capable" content="yes">
<link rel="shortcut icon" href="images/icon.png">
<link rel="apple-touch-startup-image" href="images/startup.png">
<meta name="viewport" content="width=device-width, user-scalable=no">
<script src="https://code.jquery.com/jquery-2.1.0.min.js"></script>
<script src="jquery-ui-1.10.4.custom/js/jquery-ui-1.10.4.custom.min.js"> </script>
<script>
var online = navigator.onLine;
$(document).ready(function() {
if (online == false) {
$('#wifiwarning').fadeToggle("fast");
};
});
</script>
<script>
$( ".blankWindow" ).draggable({ handle: "#blankWindowHandle" });
// getter
var handle = $( ".blankWindow" ).draggable( "option", "handle" );
// setter
$( ".blankWindow" ).draggable( "option", "handle", "#blankWindowHandle" );
</script>
</head>
<body>
<div id="addButton">
<img src="images/add.png" alt="Add" onClick="$('#appMkt').fadeToggle('fast');"/>
</div>
<appWindow id='appMkt'>
<div class="close" onClick="$('#appMkt').fadeToggle('fast');"></div>
~APPS~<HR/>
<div onClick="$('.blankWindow').fadeToggle('fast');$('#appMkt').fadeToggle('fast');"><img src="images/icon.png"> .blankWindow()</div><hr/>
<div onClick="$('.info').fadeToggle('fast');$('#appMkt').fadeToggle('fast');"><img src="images/icon.png"> App Info</div>
</appWindow>
<appWindow class="blankWindow">
<div class="appClose" onClick="$('.blankWindow').fadeToggle('fast');"></div>
<center id="blankWindowHandle">
~Blank~<hr/>
</center>
This is a .blankWindow<br/><br/>
We can use this to house the apis (apps).
</appWindow>
<appWindow class="info">
<div class="close" onClick="$('.info').fadeToggle('fast');"></div>
~INFO~<HR/>
<a rel="license" href="https://creativecommons.org/licenses/by-nd/4.0/"><img alt="Creative Commons License" style="border-width:0;width:88px;height:31px;" src="https://i.creativecommons.org/l/by-nd/4.0/88x31.png" /></a><br /><span xmlns:dct="http://purl.org/dc/terms/" href="http://purl.org/dc/dcmitype/InteractiveResource" property="dct:title" rel="dct:type">ModularWiz</span> is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nd/4.0/">Creative Commons Attribution-NoDerivatives 4.0 International License</a>.<hr/>
Developed by:<br/> ... and ...<hr/>
</appWindow>
<div id="wifiwarning">
<!-- NOTE: THIS DIV ALWAYS NEEDS TO BE THE VERY LAST THING ON THE PAGE INSIDE THE BODY TAGS -->
<br />
<br />
You need to be connected to the internet to use this app.
<br />
Please try going to settings and toggling wifi on
<br />
<br />
</div>
</body>
您的 JS 代码可能在创建 DOM 之前执行。尝试使用 $（document）.ready（function（）{}）;或其缩写 $（function（）{}）;以确保您的 JS 在创建 DOM 后运行。你也可以把你的JS放在主体的底部，这样你就可以确保JS在创建DOM后立即运行。
更新：正如我建议的那样，我将您的JS放在身体的底部，它工作正常
<!DOCTYPE html>
<html>
<head>
<title>ModularWiz_B</title>
<link rel="stylesheet" href="style.css" type="text/css" />
<link rel="apple-touch-icon-precomposed" href="images/icon.png">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="mobile-web-app-capable" content="yes">
<link rel="shortcut icon" href="images/icon.png">
<link rel="apple-touch-startup-image" href="images/startup.png">
<meta name="viewport" content="width=device-width, user-scalable=no">
</head>
<body>
<div id="addButton">
<img src="images/add.png" alt="Add" onClick="$('#appMkt').fadeToggle('fast');"/>
</div>
<appWindow id='appMkt'>
<div class="close" onClick="$('#appMkt').fadeToggle('fast');"></div>
~APPS~<HR/>
<div onClick="$('.blankWindow').fadeToggle('fast');$('#appMkt').fadeToggle('fast');"><img src="images/icon.png"> .blankWindow()</div><hr/>
<div onClick="$('.info').fadeToggle('fast');$('#appMkt').fadeToggle('fast');"><img src="images/icon.png"> App Info</div>
</appWindow>
<appWindow class="blankWindow ui-draggable">
<div class="appClose" onClick="$('.blankWindow').fadeToggle('fast');"></div>
<center id="blankWindowHandle">
~Blank~<hr/>
</center>
This is a .blankWindow<br/><br/>
We can use this to house the apis (apps).
</appWindow>
<appWindow class="info">
<div class="close" onClick="$('.info').fadeToggle('fast');"></div>
~INFO~<HR/>
<a rel="license" href="https://creativecommons.org/licenses/by-nd/4.0/"><img alt="Creative Commons License" style="border-width:0;width:88px;height:31px;" src="https://i.creativecommons.org/l/by-nd/4.0/88x31.png" /></a><br /><span xmlns:dct="http://purl.org/dc/terms/" href="http://purl.org/dc/dcmitype/InteractiveResource" property="dct:title" rel="dct:type">ModularWiz</span> is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nd/4.0/">Creative Commons Attribution-NoDerivatives 4.0 International License</a>.<hr/>
Developed by:<br/> ... and ...<hr/>
</appWindow>
<div id="wifiwarning">
<!-- NOTE: THIS DIV ALWAYS NEEDS TO BE THE VERY LAST THING ON THE PAGE INSIDE THE BODY TAGS -->
<br />
<br />
You need to be connected to the internet to use this app.
<br />
Please try going to settings and toggling wifi on
<br />
<br />
</div>
<script src="https://code.jquery.com/jquery-2.1.0.min.js"></script>
<script src="jquery-ui-1.10.4.custom/js/jquery-ui-1.10.4.custom.min.js"></script>
<script>
var online = navigator.onLine;
$(document).ready(function() {
if (online == false) {
$('#wifiwarning').fadeToggle("fast");
};
});
</script>
<script>
$( ".blankWindow" ).draggable({ handle: "#blankWindowHandle" });
// getter
var handle = $( ".blankWindow" ).draggable( "option", "handle" );
// setter
$( ".blankWindow" ).draggable( "option", "handle", "#blankWindowHandle" );
</script>
</body>