javascript 可控速度的上下拉菜单

样式部分

<style type="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

<ul class="side-nav-list" id="side-nav-list">

    <li><a href="javascript:;">￥??￥?????￥??</a><span class="slide-btn">+</span>

        <ul class="side-nav-list-2">

            <li><a href="slide.htm">￥??￥??</a><span class="slide-btn">+</span>

                <ul class="side-nav-list-3">

                <li><a href="http://test.php?id=12">￥????????<span>(146)</span></a></li>

                <li><a href="http://test.php?id=13">???￥?????<span>(146)</span></a></li>

                <li><a href="http://test.php?id=14">￥?????<span>(146)</span></a></li>

                <li><a href="http://test.php?id=15">￥?????<span>(146)</span></a></li>

                <li><a href="http://test.php?id=16">??????<span>(146)</span></a></li>

                <li><a href="http://test.php?id=17">￥????????<span>(146)</span></a></li>

                </ul>

            </li>

            <li><a href="http://test.php?id=7">￥??￥??</a><span class="slide-btn">+</span>

                <ul class="side-nav-list-3">

                <li><a href="http://test.php?id=23">￥????????<span>(146)</span></a></li>

                <li><a href="http://test.php?id=24">???￥?????<span>(146)</span></a></li>

                <li><a href="http://test.php?id=25">￥?????<span>(146)</span></a></li>

                <li><a href="http://test.php?id=26">￥?????<span>(146)</span></a></li>

                <li><a href="http://test.php?id=27">???￥?????<span>(146)</span></a></li>

                <li><a href="http://test.php?id=28">￥????????<span>(146)</span></a></li>

                </ul>

            </li>

            <li><a href="http://test.php?id=8">￥????????</a><span class="slide-btn">+</span>

                <ul class="side-nav-list-3">

                <li><a href="http://test.php?id=29">￥????????<span>(146)</span></a></li>

                <li><a href="http://test.php?id=30">???￥?????<span>(146)</span></a></li>

                <li><a href="http://test.php?id=31">￥??????????????<span>(146)</span></a></li>

                <li><a href="http://test.php?id=32">￥????????<span>(146)</span></a></li>

                </ul>

            </li>

            <li><a href="http://test.php?id=10">￥??￥??</a><span class="slide-btn">+</span>

                <ul class="side-nav-list-3">

                <li><a href="http://test.php?id=37">￥??￥??￥????????<span>(146)</span></a></li>

                </ul>

            </li>

            <li><a href="http://test.php?id=11">???￥??</a><span class="slide-btn">+</span>

                <ul class="side-nav-list-3">

                <li><a href="http://test.php?id=38">￥????????<span>(146)</span></a></li>

                <li><a href="http://test.php?id=39">???￥?????<span>(146)</span></a></li>

                </ul>

            </li>
</ul>

    </li>

    <li><a href="javascript:;">￥????????￥??</a><span class="slide-btn">+</span>

        <ul class="side-nav-list-2">

            <li><a href="http://test.php?id=42">3U???</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.tagName.toLowerCase()==‘span‘ && pen.className==‘slide-btn‘){

        pen.click();

    }

}
</script>

Slide.js部分

// JavaScript Document
var 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‘){

        sideSpanBtn[i].onclick = function(){ul_slide(this,‘ul‘);}

    }

}

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.nodeType!=1 && x!=null){

        x=x.nextSibling;

    }

    return x;

}
function getPrevEleNode(n){

    var x=n.previousSibling;

    while (x.nodeType!=1 && x!=null){

        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‘;

    }
}

javascript 可控速度的上下拉菜单

时间： 2024-08-01 05:13:57

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