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无法通过键盘选项卡导航无序列表菜单

2013-04-05 57 views
1

我想解决为什么我无法导航我们的菜单，它通过键盘使用多个无序列表。无法通过键盘选项卡导航无序列表菜单

有没有人有任何提示？我感觉它更像是一个CSS问题，而不是HTML。

相关CSS：

/* MENU */ 


#cssmenu{ 
    border:none; 
    border:0px; 
    margin:0px; 
    padding:0px; 
    font: 67.5% 'Lucida Sans Unicode', 'Bitstream Vera Sans', 'Trebuchet Unicode MS', 'Lucida Grande', Verdana, Helvetica, sans-serif; 
    font-size:11px; 
    font-weight:bold; 
    } 
#cssmenu ul{ 
    background:#333333; 
    height:39px; 
    list-style:none; 
    margin:0; 
    padding:0; 
    display: table; 
    width: 100%; 

    } 
#cssmenu li{ 
    padding:0px; 
    display: table-cell; 
    width: 115px; 
    } 

#cssmenu li a{ 
    background:#333333 url('../images/seperator.gif') bottom right no-repeat; 
    color:#FFF; 
    display:block; 
    font-weight:normal; 
    line-height:39px; 
    margin:0px; 
    padding:0px 0px; 
    text-align:center; 
    text-decoration:none; 
    width: 115px; 

    } 



#cssmenu li a:hover, #cssmenu ul li:hover a{ 
    background: #2580a2; 
    color:#FFFFFF; 
    text-decoration:none; 
    float: none; 
    } 
#cssmenu li ul{ 
    background:#333333; 
    display:none; 
    height:auto; 
    padding:0px; 
    margin:0px; 
    border:0px; 
    position:absolute; 
    width:230px; 
    z-index:200; 
    /*top:1em; 
    /*left:0;*/ 
    } 
#cssmenu li:hover ul{ 
    display:block; 

    } 
#cssmenu li li { 
    background:url('../images/sub_sep.gif') bottom left no-repeat; 
    display:block; 
    float:none; 
    margin:0px; 
    padding:0px; 
    width:230px; 
    } 
#cssmenu li:hover li a{ 
    background:none; 
    } 
#cssmenu li ul a{ 
    display:block; 
    height:35px; 
    font-size:10px; 
    font-style:normal; 
    margin:0px; 
    padding:0px 10px 0px 15px; 
    text-align:left; 
    width: 205px; 

    } 
#cssmenu li ul a:hover, #cssmenu li ul li:hover a{ 
    background:#2580a2 url('../images/hover_sub.gif') center left no-repeat; 
    border:0px; 
    color:#ffffff; 
    text-decoration:none; 
    width: 205px; 

    } 
#cssmenu p{ 
    clear:left; 
    } 

:focus {outline:none;} 
::-moz-focus-inner {border:0;}

相关的HTML代码：

<div id="cssmenu">         <ul>    <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:HOMEPAGE:2059103169:pc=PC_90001">Home</a></li>   
        <li class="has-sub">    <a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90002">Operations</a>    <ul>    
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90003">Individuals</a>       
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90123">Aircraft owners</a>       
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90276">Aircraft operators </a>       
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90389">Flight training</a>       
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90405">Aerodromes</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90447">Office of airspace regulation</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_93439">Sport aviation</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_93379">Class D</a>       
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_100058">Non-towered aerodromes</a>       
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90385">Dangerous goods</a>       
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_100808">Ground operations</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_100847"> Non-compliance notice </a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_100374">Unmanned Aircraft Systems (UAS) </a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_100705">General Aviation (GA) task force</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_100852">Regional Aviation Safety Forum (RASF)</a>      
     </li> 
        <li><a href="http://casa.gov.au/aod" target="_top">Drug and Alcohol Management Plans</a>       
     </li> 
        </ul></li>   
        <li class="has-sub">    <a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90473">Airworthiness</a>    <ul>    
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_100610">Maintenance regulations</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90474">Personnel</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90496">Certification and design</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90507">Manufacturing</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90515">Continuing airworthiness</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90822">Airworthiness directives</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90821">Maintenance organisations</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_101038">Flight test and evaluation</a>       
     </li> 
        </ul></li>   
        <li class="has-sub">    <a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90900">Regulations &amp; policy</a>    <ul>    
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90902">Current rules</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:PWA:2059103169:pc=PC_91070">Changing the rules</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91181">Enforcement action</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:PWA:2059103169:pc=PC_91190">Policy notices</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_100396">Australia's state safety program</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_101078">Performance based navigation (PBN)</a>       
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_101326">Licensing regulations</a>      
     </li> 
        </ul></li>   
        <li class="has-sub">    <a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91263">Manuals &amp; forms</a>    <ul>    
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91264">Manuals</a>       
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91308">Forms</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91316">CASA online store</a>      
     </li> 
        </ul></li>   
        <li class="has-sub">    <a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91314">Education</a>    <ul>    
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_101349">AviationWorx</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_100101">eLearning catalogue</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91346">Flight Safety Australia</a>       
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_90006"> Pilot guides and information </a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_100138">OnTrack</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_100994">Human factors</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91430">Safety management systems</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91329">Seminars and workshops</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91317">Aviation safety advisers</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91455">Advice for air travellers</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91316">CASA online store</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_101317">Out-n-Back</a>       
     </li> 
        </ul></li>   
        <li class="has-sub">    <a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91488">Services</a>    <ul>    
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91489">Licences and registrations</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91510">Service standards and fees</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:PWA:2059103169:pc=PC_91499">Self Service Portal</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91517">Permission application centre (PAC)</a>       
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91521">Aviation medicals</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_100450">Delegates and authorised persons</a>      
     </li> 
        </ul></li>   
        <li class="has-sub">    <a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91621">About CASA</a>    <ul>    
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91622">Contact CASA</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_93342">CASA board</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91668">CASA's Director</a>       
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_91703">Recent media releases </a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_92568">Corporate publications</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_100448">CASA on Twitter</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_92918">Corporate policy</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_92936">Careers at CASA</a>       
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_92956">Research and statistics</a>       
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_100223">International Engagement</a>      
     </li> 
        <li><a href="HTTP://wcmsdev/scripts/nc.dll?WCMS:STANDARD:2059103169:pc=PC_100330">CASA mailing lists</a>       
     </li> 
        </ul></li>   
</ul> 
</div>

来源

2013-04-05 sephiith

+0

我发现了这个工作示例http://jsfiddle.net/ cfWpE /（这里：http://stackoverflow.com/questions/8741521/accessible-css-dropdown-menu）所以看看。 – 2013-04-05 02:38:00

回答

2

它不工作，因为你只有:hover规则，键盘不会触发。当一个元素具有选项卡焦点时，它具有:focus伪类，当添加它时，您会发现菜单项在聚焦时点亮，但仍然不打开菜单。

jsFiddle: With :focus rules along side :hover rules

enter image description here

这是由于以下规则：

#cssmenu li:hover ul, 
#cssmenu li:focus ul{ 
    display:block; 
}

的li实际上从未被关注，因为它没有标签指数，li内a获得焦点。由于li是ul的父项，但a是ul的兄弟，我们需要使用其他规则才能使此定位生效。我们可以使用下一个兄弟选择器+来根据a:focus定位ul。这让我们更近了一步。

#cssmenu li:hover ul, 
#cssmenu li a:focus + ul{ 
    display:block; 
}

jsFiddle with the above applied

enter image description here

不幸的是，只要你可以用CSS去（据我所知）。当我们尝试去下一个a时，:focus将被丢弃在顶层a上，并且由于子菜单将丢失display:block;，菜单将被隐藏。由于我们在应用样式时无法遍历树，所以我们无法将display:block应用于祖先ul，因为我们在:focus和a之后进一步向下。

我可以看到越来越解决这个问题的唯一方法是使用JavaScript和处理focus（也许blur()）事件的顶级菜单项。然后，我们还必须处理click()事件，以便在单击文档中的任意位置时隐藏菜单，否则它将保持活动状态。

jsFiddle fully working

enter image description here

CSS

#cssmenu li.force-show ul, 
#cssmenu li:hover ul, 
#cssmenu li a:focus + ul{ 
    display:block; 
}

JS

$('#cssmenu > ul > li > a').focus(function() { 
    $('#cssmenu > ul > li').removeClass('force-show'); 
    $(this).parent().addClass('force-show'); 
}); 

// Clear the menu class if clicked anywhere in the document. 
$(document).click(function() { 
    $('#cssmenu > ul > li').removeClass('force-show'); 
});

来源

2013-04-05 02:47:12

+1

只是我长期见过的最好的答案。 – sephiith 2013-04-09 02:15:10

0

的问题是，在focus CSS不能上升。我来到最近的是this：

/* for instance use it that way */ 
#cssmenu li a:hover, 
#cssmenu li a:focus, 
#cssmenu ul li:hover a, 
#cssmenu ul li:focus a { }

的示例适用于第一级。但是在第二个时候，第一个输出是:focus，所以子菜单又被隐藏了。我认为你需要用JavaScript来帮助一下。

来源

2013-04-05 02:34:47

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