javascript+css 标签显示方式的思考收藏

星期天看了很多国外的图书出版商的网站！发现Sams的标签显示方式的实践思路不错！标签显示的实践方式一般都要用到:javascript,来动态改变div的显示和隐藏.来看看人家写的JS代码吧:

<script type="text/javascript">
//<![CDATA[
         //标签的数组,如果让我写,我想不到会用这个保存
    var tabArray = new Array();
         //默认显示哪个标签
    function showDefaultTab(){
        //show 'Description' tab by default, else show first
        if(!showTab('item1')){
             displayToggle(tabArray[0]+"_container",true,'container on');
             document.getElementById(tabArray[0]).className = 'selected';
         }
     }
         //改变内容盒的隐显,并重绘显示样式:感觉有点像配适器模式
    function showTab(tabID){
        var found = false;
        for(var i=0; i < tabArray.length; i++){
            if(tabArray[i] != tabID){
                 displayToggle(tabArray[i]+"_container",false, 'container');
                 document.getElementById(tabArray[i]).className = '';
             }else{
                 displayToggle(tabArray[i]+"_container",true,'container on');
                 document.getElementById(tabArray[i]).className = 'selected';
                 found = true;
             }
         }
        return found;
     }
    //showtab函数会调用这个函数来隐显内容盒        
    function displayToggle(id, show, newClass){
        var obj = document.getElementById(id);
        if(obj != null){                
            if(show){
                 obj.style.visibility="visible";
                 obj.style.display="block";
             }else{
                 obj.style.visibility="hidden";
                 obj.style.display="none";
             }

            if(newClass != null)
                 obj.className = newClass;
         }
     }
//]]>
</script>

看看HTML的代码吧！相信大家都猜了个大概:

    <div id="sitepage">
        <div id="productBSS" class="tabwidget">
            <ul class="tabs">
                <li id="item1">
                    <a id="info3" href="#info3" onclick="showTab('item1'); return false;">Description</a>
                </li>
                <script language="JavaScript">
                     tabArray.push('item1');
                </script>
                <li id="item2">
                    <a id="info8" href="#info8" onclick="showTab('item2'); return false;">Sample Content</a>
                </li>
                <script language="JavaScript">
                     tabArray.push('item2');
                </script>
            </ul>
        </div>
        <div id="bssContent">
            <div id="item1_container">
                <!--detail content-->
            </div>
            <div id="item2_container">
                <!--detail content-->
            </div>
        </div>
       <script language="JavaScript">
               showDefaultTab();
       </script>
    </div>

最后是CSS的样式定义:

<style type="text/css">
<!--
body {margin:150px 0 0 0;font-size:0.8em;font-family:"Lucida Grande", Arial, Helvetica, sans-serif;}
div#sitepage{ margin:0 0 0 184px; padding:0; width:400px;height:auto;}
div#productBSS { clear:both; }
div#bssContent { margin:-1px 0 0 0; padding:1em; border-right:1px solid #C7C8CA; border-left:1px solid #C7C8CA;  border-bottom:1px solid #C7C8CA; border-top:1px solid #C7C8CA; }
/* - Tab Widget (blog sidebar) - */
div.tabwidget { border-left: 1px solid #C7C8CA; position: relative; }
/* tab control */
div.tabwidget ul.tabs { list-style: none; margin: 0; padding: 0 0 1px 0; height: 2em; border-bottom: 1px solid #C7C8CA; }
div.tabwidget ul.tabs li { display: block; float: left; background-color:#EEE; border: 1px solid #C7C8CA; border-width: 1px 1px 1px 0; padding: 0 1em; line-height: 2em; margin: 0; }
div.tabwidget ul.tabs li.selected { background-color: #FFF; border-bottom: 1px solid #FFF; }
/* layer control */
div.tabwidget div.container { display: none; clear: both; border: 1px solid #C7C8CA; border-width: 0 1px 1px 0; position: relative; }
div.tabwidget div.on { display: block; }
/* Content control */

:link,:visited { text-decoration:none; }
a:link { color:#004F7F; }
a:visited { color:#2E87B2; }
a:hover, a:active { color:#004F7F; text-decoration:underline; }
-->
</style>

最值的学习的是：javascript数组在这过程的应用!有人会说！硬编码不是更好么!不就少了至少一个函数和两个push操作.这种表现形式是死的！但要灵活运用人家写代码的思维！如果你只学习人家的表面形式. 哪没什么好说的!