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js 延迟菜单

时间:2016-10-10 23:11:33      阅读:120      评论:0      收藏:0      [点我收藏+]

1.效果图

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2.

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <link rel="stylesheet" type="text/css" href="miaov_style.css">
    <script>
        window.onload = function(){
            var aA = getByClassName(document, ‘normal‘);
            var aSpan = getByClassName(document, ‘float_layer‘);
            var timer = null;

            for(var i = 0; i < aA.length; i++){
                aA[i].index = i; //给按钮加索引,这样与其他元素形成一个对应
                aA[i].onmouseover = function(){
                    for(var i = 0; i < aSpan.length ; i++){ //目的是其他3个隐藏
                        aSpan[i].style.display = ‘none‘;
                    }
                    aSpan[this.index].style.display = ‘block‘;//当前的显示
                    clearInterval(timer);//从span移回到标题也不隐藏span
                };
                aA[i].onmouseout = function(){ //标题鼠标移开,对应的下面的内容消失,但不能立即消失,否则鼠标永远也倒不了下面的内容上了
                    var This = this;//此刻this 是指 aA[i]
                    timer = window.setTimeout(function(){
                        aSpan[This.index].style.display = ‘none‘;
                        //aSpan[this.index].style.display = ‘none‘;//不能写this,此刻this指向的是window
                    },1000);
                }

                aSpan[i].onmouseover = function(){
                    clearInterval(timer);//让定时器失效,span不隐藏
                }
                aSpan[i].onmouseout = function(){
                    var This = this;
                    timer = setTimeout(function(){
                        This.style.display = ‘none‘; //This == aSpan[i]
                    },500);
                }

            }

            function getByClassName(parent, className){
                var aTag = parent.getElementsByTagName("*");
                var result = [];
                var reg = new RegExp(‘\\b‘+ className + ‘\\b‘,‘i‘);
                for(var i = 0; i < aTag.length; i++){
                    if(reg.test(aTag[i].className)){
                        result.push(aTag[i]);
                    }
                }
                return result;
            }
        }

    </script>
</head>
<body>
<div id="nav">
    <div class="adorn1"></div>
    <div class="adorn2"></div>
    <ul>
        <li>
            <a class="normal" href="http://www.miaov.com"><span>首页</span></a>
            <span class="float_layer w1 pos1">
                <span class="arrows"></span>
                <span class="decorate1"></span>
                <span class="decorate2"></span>
                <a href="http://www.miaov.com"><span>最近更新</span></a>
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            </span>
        </li>
        <li class="line">
            <a class="normal" href="http://www.miaov.com"><span>关于我们</span></a>
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                <a href="http://www.miaov.com"><span>联系我们</span></a>
            </span>
        </li>
        <li class="line">
            <a class="normal" href="http://www.miaov.com"><span>作品</span></a>
            <span class="float_layer w3 pos3">
                <span class="arrows"></span>
                <span class="decorate1"></span>
                <span class="decorate2"></span>
                <a href="http://www.miaov.com"><span>般固</span></a>
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        </li>
        <li class="line">
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            </span>
        </li>
    </ul>
    <p><a href="http://www.miaov.com">>>更多</a></p>
</div>
</body>
</html>

  

js 延迟菜单

原文:http://www.cnblogs.com/bravolove/p/5947543.html

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