javascript 可控速度的上下拉菜单

来源：互联网发布：修改美萍数据编辑：程序博客网时间：2024/04/30 03:08

样式部分

<styletype="text/css">

*{ margin:0; padding:0; border:none; background:none;}ul,li{ list-style:none;}.side-nav-list{ width:200px; background:#eee; border:#666 1px solid; padding:5px 10px; margin:20px auto;}.side-nav-list li{ border-bottom:#666 1px solid;}.side-nav-list-2,.side-nav-list-3{ display:none;}.side-nav-list-2 li{ border-bottom:#999 1px dotted;}.side-nav-list-3 li{ border-bottom:none;}.side-nav-list .side-nav-list-2 a{ text-indent:1em;}.side-nav-list .side-nav-list-3 a{ text-indent:2em;}.side-nav-list a,.side-nav-list .slide-btn{color:#000; display:inline-block; height:24px; line-height:24px; overflow:hidden;}.side-nav-list a{ text-decoration:none; width:80%; font-size:12px;}.side-nav-list a:hover{ color:#C00;}.side-nav-list .slide-btn{width:20%;text-align:center; cursor:pointer; font-weight:bold; font-size:16px;}.side-nav-list .active-li{ background:#FFF; font-weight:bold;}</style>

HTML部分

<ulclass="side-nav-list" id="side-nav-list">

    <li><a href="javascript:;">家居灯具</a><span class="slide-btn">+</span>        <ul class="side-nav-list-2">            <li><a href="slide.htm">客厅</a><span class="slide-btn">+</span>                <ul class="side-nav-list-3">                <li><a href="http://test.php?id=12">吸顶灯<span>(146)</span></a></li>                <li><a href="http://test.php?id=13">落地灯<span>(146)</span></a></li>                <li><a href="http://test.php?id=14">台灯<span>(146)</span></a></li>                <li><a href="http://test.php?id=15">壁灯<span>(146)</span></a></li>                <li><a href="http://test.php?id=16">筒灯<span>(146)</span></a></li>                <li><a href="http://test.php?id=17">天花灯<span>(146)</span></a></li>                </ul>            </li>            <li><a href="http://test.php?id=7">卧室</a><span class="slide-btn">+</span>                <ul class="side-nav-list-3">                <li><a href="http://test.php?id=23">吸顶灯<span>(146)</span></a></li>                <li><a href="http://test.php?id=24">落地灯<span>(146)</span></a></li>                <li><a href="http://test.php?id=25">台灯<span>(146)</span></a></li>                <li><a href="http://test.php?id=26">壁灯<span>(146)</span></a></li>                <li><a href="http://test.php?id=27">镜前灯<span>(146)</span></a></li>                <li><a href="http://test.php?id=28">天花灯<span>(146)</span></a></li>                </ul>            </li>            <li><a href="http://test.php?id=8">儿童房</a><span class="slide-btn">+</span>                <ul class="side-nav-list-3">                <li><a href="http://test.php?id=29">吸顶灯<span>(146)</span></a></li>                <li><a href="http://test.php?id=30">落地灯<span>(146)</span></a></li>                <li><a href="http://test.php?id=31">儿童护眼灯<span>(146)</span></a></li>                <li><a href="http://test.php?id=32">吊线灯<span>(146)</span></a></li>                </ul>            </li>            <li><a href="http://test.php?id=10">厨卫</a><span class="slide-btn">+</span>                <ul class="side-nav-list-3">                <li><a href="http://test.php?id=37">厨卫吸顶灯<span>(146)</span></a></li>                </ul>            </li>            <li><a href="http://test.php?id=11">阳台</a><span class="slide-btn">+</span>                <ul class="side-nav-list-3">                <li><a href="http://test.php?id=38">吸顶灯<span>(146)</span></a></li>                <li><a href="http://test.php?id=39">感应灯<span>(146)</span></a></li>                </ul>            </li>                </ul>    </li>    <li><a href="javascript:;">光源电器</a><span class="slide-btn">+</span>        <ul class="side-nav-list-2">            <li><a href="http://test.php?id=42">3U灯</a><span class="slide-btn">+</span>                <ul class="side-nav-list-3">                </ul>            </li>        </ul>    </li></ul>                             <script type="text/javascript" src="slide.js"></script>                          <script type="text/javascript">var slideA = sideNavList.getElementsByTagName('a');var lhref = location.href;var ids = lhref.match(/id=\d+/);if(ids){    for(var i=0; i < slideA.length; i++){        var tlink = slideA[i].href.match(/id=\d+/);        if(tlink && (tlink[0] === ids[0]) ){             var pn = slideA[i].parentNode.parentNode;             if(pn.tagName.toLowerCase()=='ul'){                show_nav_sel(pn);                  }             slideA[i].parentNode.className = 'active-li';        }    }}function show_nav_sel(o){    var p_t = o.parentNode.parentNode;    if(p_t.tagName.toLowerCase()=='ul'){        arguments.callee(p_t);    }    var pen = getPrevEleNode(o);    if(pen!=null && pen.tagName.toLowerCase()=='span' && pen.className=='slide-btn'){        pen.click();    }}</script>

Slide.js部分

// JavaScript Documentvar sideNavList = document.getElementById('side-nav-list'),    sideSpanBtn = sideNavList.getElementsByTagName('span'),    spanLength = sideSpanBtn.length,    i = 0;for(; i < spanLength ; i++){    if(sideSpanBtn[i].className == 'slide-btn'){        var next_ul = getNextEleNode(sideSpanBtn[i]);        var ul_in_li_length = next_ul && next_ul.tagName.toLowerCase()=='ul' ? next_ul.getElementsByTagName('li').length : 0;        if(ul_in_li_length){            sideSpanBtn[i].onclick = function(){ul_slide(this,'ul');}        }else{            sideSpanBtn[i].style.display = 'none';        }    }}function ul_slide(o,s_tag){    o.innerHTML = o.innerHTML=='+'?'-':'+';    var n_s = getNextEleNode(o);    if(!n_s){return false;}    if(n_s.tagName.toLowerCase()==s_tag){        var n_s_display = n_s.style.display;        if(n_s_display =='none' || !n_s_display || (n_s_display=='block' && !n_s.offsetHeight)){            slideDown(n_s,500);        }else{            slideUp(n_s,500);        }    }}function getNextEleNode(n){    var x=n.nextSibling;    while ( x!=null && x.nodeType!=1){        x=x.nextSibling;    }    return x;}function getPrevEleNode(n){    var x=n.previousSibling;    while ( x!=null && x.nodeType!=1){        x=x.previousSibling;    }    return x;}function slideDown(o,t){    o.style.display = 'block';    o.style.overflow = 'hidden';    var h = o.scrollHeight;    if(h>0){        var m = h / t * 10;        set_slide_down(o,h,m,t,1);    }}function slideUp(o,t){    var h = o.scrollHeight;    if(h>0){        var m = h / t * 10;        set_slide_up(o,h,m,t,1);    }}function set_slide_down(o,h,m,t,n){    if( m * n < h ){        o.style.height = (m*n)+'px';        setTimeout(function(){set_slide_down(o,h,m,t,n+1)},1);    }else{        o.style.height = "auto";    }}function set_slide_up(o,h,m,t,n){    if( ( h-( m * n ) ) > 0 ){        o.style.height = h-(m*n)+'px';        setTimeout(function(){set_slide_up(o,h,m,t,n+1)},1);    }else{        o.style.height = '0px';    }    }

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