懂jQuery UI和ARIA的前辈帮忙指点下！
下面有两段代码，全部来自jQuery UI官方，帮忙的前辈可以复制为HTML测试，一段是TAB标签选择夹的，一段是MENU菜单的。
首先TAB例子中，我只想问的是
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>jQuery UI Tabs - Simple manipulation</title>
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
<link rel="stylesheet" href="/resources/demos/style.css" />
<style>
#dialog label, #dialog input { display:block; }
#dialog label { margin-top: 0.5em; }
#dialog input, #dialog textarea { width: 95%; }
#tabs { margin-top: 1em; }
#tabs li .ui-icon-close { float: left; margin: 0.4em 0.2em 0 0; cursor: pointer; }
#add_tab { cursor: pointer; }
</style>
<script>
$(function() {
var tabTitle = $( "#tab_title" ),
tabContent = $( "#tab_content" ),
tabTemplate = "<li><a href='#{href}'>#{label}</a> <span class='ui-icon ui-icon-close' role='presentation'>Remove Tab</span></li>",
tabCounter = 2;
var tabs = $( "#tabs" ).tabs();
// modal dialog init: custom buttons and a "close" callback reseting the form inside
var dialog = $( "#dialog" ).dialog({
autoOpen: false,
modal: true,
buttons: {
Add: function() {
addTab();
$( this ).dialog( "close" );
},
Cancel: function() {
$( this ).dialog( "close" );
}
},
close: function() {
form[ 0 ].reset();
}
});
// addTab form: calls addTab function on submit and closes the dialog
var form = dialog.find( "form" ).submit(function( event ) {
addTab();
dialog.dialog( "close" );
event.preventDefault();
});
// actual addTab function: adds new tab using the input from the form above
function addTab() {
var label = tabTitle.val() || "Tab " + tabCounter,
id = "tabs-" + tabCounter,
li = $( tabTemplate.replace( /#\{href\}/g, "#" + id ).replace( /#\{label\}/g, label ) ),
tabContentHtml = tabContent.val() || "Tab " + tabCounter + " content.";
tabs.find( ".ui-tabs-nav" ).append( li );
tabs.append( "<div id='" + id + "'><p>" + tabContentHtml + "</p></div>" );
tabs.tabs( "refresh" );
tabCounter++;
}
// addTab button: just opens the dialog
$( "#add_tab" )
.button()
.click(function() {
dialog.dialog( "open" );
});
// close icon: removing the tab on click
tabs.delegate( "span.ui-icon-close", "click", function() {
var panelId = $( this ).closest( "li" ).remove().attr( "aria-controls" );
$( "#" + panelId ).remove();
tabs.tabs( "refresh" );
});
tabs.bind( "keyup", function( event ) {
if ( event.altKey && event.keyCode === $.ui.keyCode.BACKSPACE ) {
var panelId = tabs.find( ".ui-tabs-active" ).remove().attr( "aria-controls" );
$( "#" + panelId ).remove();
tabs.tabs( "refresh" );
}
});
});
</script>
</head>
<body>
<div id="dialog" title="Tab data">
<form>
<fieldset class="ui-helper-reset">
<label for="tab_title">Title</label>
<input type="text" name="tab_title" id="tab_title" value="" class="ui-widget-content ui-corner-all" />
<label for="tab_content">Content</label>
<textarea name="tab_content" id="tab_content" class="ui-widget-content ui-corner-all"></textarea>
</fieldset>
</form>
</div>
<button id="add_tab">Add Tab</button>
<div id="tabs">
<ul>
<li><a href="#tabs-1">Nunc tincidunt</a> <span class="ui-icon ui-icon-close" role="presentation">Remove Tab</span></li>
</ul>
<div id="tabs-1">
<p>Proin elit arcu, rutrum commodo, vehicula tempus, commodo a, risus. Curabitur nec arcu. Donec sollicitudin mi sit amet mauris. Nam elementum quam ullamcorper ante. Etiam aliquet massa et lorem. Mauris dapibus lacus auctor risus. Aenean tempor ullamcorper leo. Vivamus sed magna quis ligula eleifend adipiscing. Duis orci. Aliquam sodales tortor vitae ipsum. Aliquam nulla. Duis aliquam molestie erat. Ut et mauris vel pede varius sollicitudin. Sed ut dolor nec orci tincidunt interdum. Phasellus ipsum. Nunc tristique tempus lectus.</p>
</div>
</div>
</body>
</html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>jQuery UI Menu - Default functionality</title>
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
<link rel="stylesheet" href="/resources/demos/style.css" />
<script>
$(function() {
$( "#menu" ).menu();
});
</script>
<style>
.ui-menu { width: 150px; }
</style>
</head>
<body>
<ul id="menu">
<li class="ui-state-disabled"><a href="#">Aberdeen</a></li>
<li><a href="#">Ada</a></li>
<li><a href="#">Adamsville</a></li>
<li><a href="#">Addyston</a></li>
<li>
<a href="#">Delphi</a>
<ul>
<li class="ui-state-disabled"><a href="#">Ada</a></li>
<li><a href="#">Saarland</a></li>
<li><a href="#">Salzburg</a></li>
</ul>
</li>
<li><a href="#">Saarland</a></li>
<li>
<a href="#">Salzburg</a>
<ul>
<li>
<a href="#">Delphi</a>
<ul>
<li><a href="#">Ada</a></li>
<li><a href="#">Saarland</a></li>
<li><a href="#">Salzburg</a></li>
</ul>
</li>
<li>
<a href="#">Delphi</a>
<ul>
<li><a href="#">Ada</a></li>
<li><a href="#">Saarland</a></li>
<li><a href="#">Salzburg</a></li>
</ul>
</li>
<li><a href="#">Perch</a></li>
</ul>
</li>
<li class="ui-state-disabled"><a href="#">Amesville</a></li>
</ul>
</body>
</html>
refresh: function() {
.....
this._processTabs();
.....
}
_processTabs: function() {
var that = this;
this.tablist = this._getList()
.addClass( "ui-tabs-nav ui-helper-reset ui-helper-clearfix ui-widget-header ui-corner-all" )
.attr( "role", "tablist" );
this.tabs = this.tablist.find( "> li:has(a[href])" )
.addClass( "ui-state-default ui-corner-top" )
.attr({
role: "tab",
tabIndex: -1
});
this.anchors = this.tabs.map(function() {
return $( "a", this )[ 0 ];
})
.addClass( "ui-tabs-anchor" )
.attr({
role: "presentation",
tabIndex: -1
});
this.panels = $();
this.anchors.each(function( i, anchor ) {
var selector, panel, panelId,
anchorId = $( anchor ).uniqueId().attr( "id" ),
tab = $( anchor ).closest( "li" ),
originalAriaControls = tab.attr( "aria-controls" );
// inline tab
if ( isLocal( anchor ) ) {
selector = anchor.hash;
panel = that.element.find( that._sanitizeSelector( selector ) );
// remote tab
} else {
panelId = that._tabId( tab );
selector = "#" + panelId;
panel = that.element.find( selector );
if ( !panel.length ) {
panel = that._createPanel( panelId );
panel.insertAfter( that.panels[ i - 1 ]
[解决办法]
that.tablist );
}
panel.attr( "aria-live", "polite" );
}
if ( panel.length) {
that.panels = that.panels.add( panel );
}
if ( originalAriaControls ) {
tab.data( "ui-tabs-aria-controls", originalAriaControls );
}
tab.attr({
"aria-controls": selector.substring( 1 ),
"aria-labelledby": anchorId
});
panel.attr( "aria-labelledby", anchorId );
});
this.panels
.addClass( "ui-tabs-panel ui-widget-content ui-corner-bottom" )
.attr( "role", "tabpanel" );
},