完美拖拽 &&仿腾讯微博效果&& 自定义多级右键菜单

2021-09-19 02:56:49

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>完美拖拽</title>

<style type="text/css">

html,body{overflow:hidden;}

body,div,h2,p{margin:0;padding:0;}

body{color:#fff;background:#000;font:12px/2 Arial;}

p{padding:0 10px;margin-top:10px;}

span{color:#ff0;padding-left:5px;}

#box{position:absolute;width:300px;height:150px;background:#333;border:2px solid #ccc;top:50%;left:50%;margin:-75px 0 0 -150px;}

#box h2{height:25px;cursor:move;background:#222;border-bottom:2px solid #ccc;text-align:right;padding:0 10px;}

#box h2 a{color:#fff;font:12px/25px Arial;text-decoration:none;outline:none;}

</style>

<script type="text/javascript">

window.onload=function ()

{

    var oBox=document.getElementById("box");

    var oH2 = oBox.getElementsByTagName("h2")[0];

    var oA = oBox.getElementsByTagName("a")[0];

    var aSpan = oBox.getElementsByTagName("span");

    var disX = disY = 0;

    var bDrag = false;

    var aPos = [{x:oBox.offsetLeft, y:oBox.offsetTop}]

    //鼠标按下, 激活拖拽

    oH2.onmousedown = function (event)

    {

        var event = event || window.event;

        bDrag = true;

        disX = event.clientX - oBox.offsetLeft;

        disY = event.clientY - oBox.offsetTop;

        aPos.push({x:oBox.offsetLeft, y:oBox.offsetTop})

        this.setCapture && this.setCapture();

        return false

    };

    //拖拽开始

    document.onmousemove = function (event)

    {

        if (!bDrag) return;

        var event = event || window.event;

        var iL = event.clientX - disX;

        var iT = event.clientY - disY;

        var maxL = document.documentElement.clientWidth - oBox.offsetWidth;

        var maxT = document.documentElement.clientHeight - oBox.offsetHeight;

        iL = iL < 0 ? 0 : iL;

        iL = iL > maxL ? maxL : iL; 

        iT = iT < 0 ? 0 : iT;

        iT = iT > maxT ? maxT : iT;

        oBox.style.marginTop = oBox.style.marginLeft = 0;

        oBox.style.left = iL + "px";

        oBox.style.top = iT + "px";        

        aPos.push({x:iL, y:iT})

        status();

        return false

    };

    //鼠标释放, 结束拖拽

    document.onmouseup = window.onblur = oH2.onlosecapture = function ()

    {

        bDrag = false;

        oH2.releaseCapture && oH2.releaseCapture();

        status()

    };

    //回放拖动轨迹

    oA.onclick = function ()

    {

        if (aPos.length == 1) return;

        var timer = setInterval(function ()

        {

            var oPos = aPos.pop();

            oPos ? (oBox.style.left = oPos.x + "px", oBox.style.top = oPos.y + "px", status()) : clearInterval(timer)

        }, 30);

        this.focus = false;//去除链接虚线

        return false

    };

    //阻止冒泡

    oA.onmousedown = function (event)

    {

        (event || window.event).cancelBubble = true

    };

    //监听状态函数

    function status ()

    {

        aSpan[0].innerHTML = bDrag;

        aSpan[1].innerHTML = oBox.offsetTop;

        aSpan[2].innerHTML = oBox.offsetLeft

    }

    //初始调用

    status()

};

</script>

</head>

<body>

<div id="box">

    <h2><a href="javascript:;">点击回放拖动轨迹</a></h2>

    <p><strong>Drag:</strong><span></span></p>

    <p><strong>offsetTop:</strong><span></span></p>

    <p><strong>offsetLeft:</strong><span></span></p>

</div>

</body>

</html>

仿腾讯微博效果

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>仿腾讯微博效果</title>

<style type="text/css">

body,div,h2,h3,ul,li,p{margin:0;padding:0;}

a{text-decoration:none;}

a:hover{text-decoration:underline;}

ul{list-style-type:none;}

body{color:#333;background:#3c3a3b;font:12px/1.5 \5b8b\4f53;}

#msgBox{width:500px;background:#fff;border-radius:5px;margin:10px auto;padding-top:10px;}

#msgBox form h2{font-weight:400;font:400 18px/1.5 \5fae\8f6f\96c5\9ed1;}

#msgBox form{background:url(img/boxBG.jpg) repeat-x 0 bottom;padding:0 20px 15px;}

#userName,#conBox{color:#777;border:1px solid #d0d0d0;border-radius:6px;background:#fff url(img/inputBG.png) repeat-x;padding:3px 5px;font:14px/1.5 arial;}

#userName.active,#conBox.active{border:1px solid #7abb2c;}

#userName{height:20px;}

#conBox{width:448px;resize:none;height:65px;overflow:auto;}

#msgBox form div{position:relative;color:#999;margin-top:10px;}

#msgBox img{border-radius:3px;}

#face{position:absolute;top:0;left:172px;}

#face img{width:30px;height:30px;cursor:pointer;margin-right:6px;opacity:0.5;filter:alpha(opacity=50);}

#face img.hover,#face img.current{width:28px;height:28px;border:1px solid #f60;opacity:1;filter:alpha(opacity=100);}

#sendBtn{border:0;width:112px;height:30px;cursor:pointer;margin-left:10px;background:url(img/btn.png) no-repeat;}

#sendBtn.hover{background-position:0 -30px;}

#msgBox form .maxNum{font:26px/30px Georgia, Tahoma, Arial;padding:0 5px;}

#msgBox .list{padding:10px;}

#msgBox .list h3{position:relative;height:33px;font-size:14px;font-weight:400;background:#e3eaec;border:1px solid #dee4e7;}

#msgBox .list h3 span{position:absolute;left:6px;top:6px;background:#fff;line-height:28px;display:inline-block;padding:0 15px;}

#msgBox .list ul{overflow:hidden;zoom:1;}

#msgBox .list ul li{float:left;clear:both;width:100%;border-bottom:1px dashed #d8d8d8;padding:10px 0;background:#fff;overflow:hidden;}

#msgBox .list ul li.hover{background:#f5f5f5;}

#msgBox .list .userPic{float:left;width:50px;height:50px;display:inline;margin-left:10px;border:1px solid #ccc;border-radius:3px;}

#msgBox .list .content{float:left;width:400px;font-size:14px;margin-left:10px;font-family:arial;word-wrap:break-word;}

#msgBox .list .userName{display:inline;padding-right:5px;}

#msgBox .list .userName a{color:#2b4a78;}

#msgBox .list .msgInfo{display:inline;word-wrap:break-word;}

#msgBox .list .times{color:#889db6;font:12px/18px arial;margin-top:5px;overflow:hidden;zoom:1;}

#msgBox .list .times span{float:left;}

#msgBox .list .times a{float:right;color:#889db6;display:none;}

.tr{overflow:hidden;zoom:1;}

.tr p{float:right;line-height:30px;}

.tr *{float:left;}

</style>

<script type="text/javascript">

/*-------------------------- +

  获取id, class, tagName

 +-------------------------- */

var get = {

    byId: function(id) {

        return typeof id === "string" ? document.getElementById(id) : id

    },

    byClass: function(sClass, oParent) {

        var aClass = [];

        var reClass = new RegExp("(^| )" + sClass + "( |$)");

        var aElem = this.byTagName("*", oParent);

        for (var i = 0; i < aElem.length; i++) reClass.test(aElem[i].className) && aClass.push(aElem[i]);

        return aClass

    },

    byTagName: function(elem, obj) {

        return (obj || document).getElementsByTagName(elem)

    }

};

/*-------------------------- +

  事件绑定, 删除

 +-------------------------- */

var EventUtil = {

    addHandler: function (oElement, sEvent, fnHandler) {

        oElement.addEventListener ? oElement.addEventListener(sEvent, fnHandler, false) : (oElement["_" + sEvent + fnHandler] = fnHandler, oElement[sEvent + fnHandler] = function () {oElement["_" + sEvent + fnHandler]()}, oElement.attachEvent("on" + sEvent, oElement[sEvent + fnHandler]))

    },

    removeHandler: function (oElement, sEvent, fnHandler) {

        oElement.removeEventListener ? oElement.removeEventListener(sEvent, fnHandler, false) : oElement.detachEvent("on" + sEvent, oElement[sEvent + fnHandler])

    },

    addLoadHandler: function (fnHandler) {

        this.addHandler(window, "load", fnHandler)

    }

};

/*-------------------------- +

  设置css样式

  读取css样式

 +-------------------------- */

function css(obj, attr, value)

{

    switch (arguments.length)

    {

        case 2:

            if(typeof arguments[1] == "object")

            {

                for (var i in attr) i == "opacity" ? (obj.style["filter"] = "alpha(opacity=" + attr[i] + ")", obj.style[i] = attr[i] / 100) : obj.style[i] = attr[i];

            }

            else

            {

                return obj.currentStyle ? obj.currentStyle[attr] : getComputedStyle(obj, null)[attr]

            }

            break;

        case 3:

            attr == "opacity" ? (obj.style["filter"] = "alpha(opacity=" + value + ")", obj.style[attr] = value / 100) : obj.style[attr] = value;

            break;

    }

};

EventUtil.addLoadHandler(function ()

{

    var oMsgBox = get.byId("msgBox");

    var oUserName = get.byId("userName");

    var oConBox = get.byId("conBox");

    var oSendBtn = get.byId("sendBtn");

    var oMaxNum = get.byClass("maxNum")[0];

    var oCountTxt = get.byClass("countTxt")[0];

    var oList = get.byClass("list")[0];

    var oUl = get.byTagName("ul", oList)[0];

    var aLi = get.byTagName("li", oList);

    var aFtxt = get.byClass("f-text", oMsgBox);

    var aImg = get.byTagName("img", get.byId("face"));

    var bSend = false;

    var timer = null;

    var oTmp = "";

    var i = 0;

    var maxNum = 140;

    //禁止表单提交

    EventUtil.addHandler(get.byTagName("form", oMsgBox)[0], "submit", function () {return false});

    //为广播按钮绑定发送事件

    EventUtil.addHandler(oSendBtn, "click", fnSend);

    //为Ctrl+Enter快捷键绑定发送事件

    EventUtil.addHandler(document, "keyup", function(event)

    {

        var event = event || window.event;

        event.ctrlKey && event.keyCode == 13 && fnSend()

    });

    //发送广播函数

    function fnSend ()

    {

        var reg = /^\s*$/g;

        if(reg.test(oUserName.value))

        {

            alert("\u8bf7\u586b\u5199\u60a8\u7684\u59d3\u540d");

            oUserName.focus()

        }

        else if(!/^[u4e00-\u9fa5\w]{2,8}$/g.test(oUserName.value))

        {

            alert("\u59d3\u540d\u75312-8\u4f4d\u5b57\u6bcd\u3001\u6570\u5b57\u3001\u4e0b\u5212\u7ebf\u3001\u6c49\u5b57\u7ec4\u6210\uff01");

            oUserName.focus()

        }

        else if(reg.test(oConBox.value))

        {

            alert("\u968f\u4fbf\u8bf4\u70b9\u4ec0\u4e48\u5427\uff01");

            oConBox.focus()

        }

        else if(!bSend)

        {

            alert("\u4f60\u8f93\u5165\u7684\u5185\u5bb9\u5df2\u8d85\u51fa\u9650\u5236\uff0c\u8bf7\u68c0\u67e5\uff01");

            oConBox.focus()

        }

        else

        {

            var oLi = document.createElement("li");

            var oDate = new Date();

            oLi.innerHTML = "<div class=\"userPic\"><img src=\"" + get.byClass("current", get.byId("face"))[0].src + "\"></div>\

                             <div class=\"content\">\

                                 <div class=\"userName\"><a href=\"javascript:;\">" + oUserName.value + "</a>:</div>\

                                <div class=\"msgInfo\">" + oConBox.value.replace(/<[^>]*>|&nbsp;/ig, "") + "</div>\

                                <div class=\"times\"><span>" + format(oDate.getMonth() + 1) + "\u6708" + format(oDate.getDate()) + "\u65e5 " + format(oDate.getHours()) + ":" + format(oDate.getMinutes()) + "</span><a class=\"del\" href=\"javascript:;\">\u5220\u9664</a></div>\

                             </div>";

            //插入元素

            aLi.length ? oUl.insertBefore(oLi, aLi[0]) : oUl.appendChild(oLi);

            //重置表单

            get.byTagName("form", oMsgBox)[0].reset();

            for (i = 0; i < aImg.length; i++) aImg[i].className = "";

            aImg[0].className = "current";

            //将元素高度保存

            var iHeight = oLi.clientHeight - parseFloat(css(oLi, "paddingTop")) - parseFloat(css(oLi, "paddingBottom"));

            var alpah = count = 0;

            css(oLi, {"opacity" : "0", "height" : "0"});

            timer = setInterval(function ()

            {

                css(oLi, {"display" : "block", "opacity" : "0", "height" : (count += 8) + "px"});

                if (count > iHeight)

                {

                    clearInterval(timer);

                    css(oLi, "height", iHeight + "px");

                    timer = setInterval(function ()

                    {

                        css(oLi, "opacity", (alpah += 10));

                        alpah > 100 && (clearInterval(timer), css(oLi, "opacity", 100))

                    },30)

                }

            },30);

            //调用鼠标划过/离开样式

            liHover();

            //调用删除函数

            delLi()

        }

    };

    //事件绑定, 判断字符输入

    EventUtil.addHandler(oConBox, "keyup", confine);

    EventUtil.addHandler(oConBox, "focus", confine);

    EventUtil.addHandler(oConBox, "change", confine);

    //输入字符限制

    function confine ()

    {

        var iLen = 0;

        for (i = 0; i < oConBox.value.length; i++) iLen += /[^\x00-\xff]/g.test(oConBox.value.charAt(i)) ? 1 : 0.5;

        oMaxNum.innerHTML = Math.abs(maxNum - Math.floor(iLen));

        maxNum - Math.floor(iLen) >= 0 ? (css(oMaxNum, "color", ""), oCountTxt.innerHTML = "\u8fd8\u80fd\u8f93\u5165", bSend = true) : (css(oMaxNum, "color", "#f60"), oCountTxt.innerHTML = "\u5df2\u8d85\u51fa", bSend = false)

    }

    //加载即调用

    confine();        

    //广播按钮鼠标划过样式

    EventUtil.addHandler(oSendBtn, "mouseover", function () {this.className = "hover"});

    //广播按钮鼠标离开样式

    EventUtil.addHandler(oSendBtn, "mouseout", function () {this.className = ""});

    //li鼠标划过/离开处理函数

    function liHover()

    {

        for (i = 0; i < aLi.length; i++)

        {

            //li鼠标划过样式

            EventUtil.addHandler(aLi[i], "mouseover", function (event)

            {

                this.className = "hover";

                oTmp = get.byClass("times", this)[0];

                var aA = get.byTagName("a", oTmp);

                if (!aA.length)

                {

                    var oA = document.createElement("a");

                    oA.innerHTML = "删除";

                    oA.className = "del";

                    oA.href = "javascript:;";

                    oTmp.appendChild(oA)

                }

                else

                {

                    aA[0].style.display = "block";

                }

            });

            //li鼠标离开样式

            EventUtil.addHandler(aLi[i], "mouseout", function ()

            {

                this.className = "";

                var oA = get.byTagName("a", get.byClass("times", this)[0])[0];

                oA.style.display = "none"

            })

        }

    }

    liHover();

    //删除功能

    function delLi()

    {

        var aA = get.byClass("del", oUl);

        for (i = 0; i < aA.length; i++)

        {

            aA[i].onclick = function ()

            {

                var oParent = this.parentNode.parentNode.parentNode;

                var alpha = 100;

                var iHeight = oParent.offsetHeight;

                timer = setInterval(function ()

                {

                    css(oParent, "opacity", (alpha -= 10));

                    if (alpha < 0)

                    {

                        clearInterval(timer);

                        timer = setInterval(function ()

                        {

                            iHeight -= 10;

                            iHeight < 0 && (iHeight = 0);

                            css(oParent, "height", iHeight + "px");

                            iHeight == 0 && (clearInterval(timer), oUl.removeChild(oParent))

                        },30)

                    }

                },30);

                this.onclick = null

            }

        }

    }

    delLi();

    //输入框获取焦点时样式

    for (i = 0; i < aFtxt.length; i++)

    {

        EventUtil.addHandler(aFtxt[i], "focus", function ()    {this.className = "active"});

        EventUtil.addHandler(aFtxt[i], "blur", function () {this.className = ""})

    }

    //格式化时间, 如果为一位数时补0

    function format(str)

    {

        return str.toString().replace(/^(\d)$/,"0$1")

    }

    //头像

    for (i = 0; i < aImg.length; i++)

    {

        aImg[i].onmouseover = function ()

        {

            this.className += " hover"

        };

        aImg[i].onmouseout = function ()

        {

            this.className = this.className.replace(/\s?hover/,"")

        };

        aImg[i].onclick = function ()

        {

            for (i = 0; i < aImg.length; i++) aImg[i].className = "";

            this.className = "current"

        }

    }

});

</script>

</head>

<body>

<div id="msgBox">

    <form>

        <h2>来 , 说说你在做什么 , 想什么</h2>

        <div>

            <input id="userName" class="f-text" value="" />

            <p id="face"><img src="img/face1.gif" class="current" /><img src="img/face2.gif" /><img src="img/face3.gif" /><img src="img/face4.gif" /><img src="img/face5.gif" /><img src="img/face6.gif" /><img src="img/face7.gif" /><img src="img/face8.gif" /></p>

        </div>

        <div><textarea id="conBox" class="f-text"></textarea></div>

        <div class="tr">

            <p>

                <span class="countTxt">还能输入</span><strong class="maxNum">140</strong><span>个字</span>

                <input id="sendBtn" type="button" value="" title="快捷键 Ctrl+Enter" />

            </p>

        </div>

    </form>

    <div class="list">

        <h3><span>大家在说</span></h3>

        <ul>

            <li>

                <div class="userPic"><img src="img/face.gif" /></div>

                <div class="content">

                    <div class="userName"><a href="javascript:;">日丶久生情</a>:</div>

                    <div class="msgInfo">新增删除广播功能。</div>

                    <div class="times"><span>07月05日 15:14</span><a class="del" href="javascript:;">删除</a></div>

                </div>

            </li>

            <li>

                <div class="userPic"><img src="img/face.gif" /></div>

                <div class="content">

                    <div class="userName"><a href="javascript:;">日丶久生情</a>:</div>

                    <div class="msgInfo">新增Ctrl+Enter快捷键发送广播。</div>

                    <div class="times"><span>07月05日 12:20</span><a class="del" href="javascript:;">删除</a></div>

                </div>

            </li>

            <li>

                <div class="userPic"><img src="img/face.gif" /></div>

                <div class="content">

                    <div class="userName"><a href="javascript:;">日丶久生情</a>:</div>

                    <div class="msgInfo">新增选择头像功能。</div>

                    <div class="times"><span>07月05日 12:08</span><a class="del" href="javascript:;">删除</a></div>

                </div>

            </li>

            <li>

                <div class="userPic"><img src="img/face.gif" /></div>

                <div class="content">

                    <div class="userName"><a href="javascript:;">日丶久生情</a>:</div>

                    <div class="msgInfo">增加了记录广播时间的功能。</div>

                    <div class="times"><span>07月04日 16:55</span><a class="del" href="javascript:;">删除</a></div>

                </div>

            </li>

            <li>

                <div class="userPic"><img src="img/face.gif" /></div>

                <div class="content">

                    <div class="userName"><a href="javascript:;">日丶久生情</a>:</div>

                    <div class="msgInfo">增加了输入字符检测功能，英文/半角为半个字符，汉字/全角为一个字符。</div>

                    <div class="times"><span>07月04日 08:30</span><a class="del" href="javascript:;">删除</a></div>

                </div>

            </li>

            <li>

                <div class="userPic"><img src="img/face.gif" /></div>

                <div class="content">

                    <div class="userName"><a href="javascript:;">日丶久生情</a>:</div>

                    <div class="msgInfo">仿腾讯微博效果，欢迎大家测试！</div>

                    <div class="times"><span>07月03日 20:19</span><a class="del" href="javascript:;">删除</a></div>

                </div>

            </li>

        </ul>

    </div>

</div>

</body>

</html>

自定义多级右键菜单

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>自定义多级右键菜单</title>

<style type="text/css">

html,body{height:100%;overflow:hidden;}

body,div,ul,li{margin:0;padding:0;}

body{font:12px/1.5 \5fae\8f6f\96c5\9ed1;}

ul{list-style-type:none;}

#rightMenu{position:absolute;top:-9999px;left:-9999px;}

#rightMenu ul{float:left;border:1px solid #979797;background:#f1f1f1 url(img/line.png) 24px 0 repeat-y;padding:2px;box-shadow:2px 2px 2px rgba(0,0,0,.6);}

#rightMenu ul li{float:left;clear:both;height:24px;cursor:pointer;line-height:24px;white-space:nowrap;padding:0 30px;}

#rightMenu ul li.sub{background-repeat:no-repeat;background-position:right 9px;background-image:url(img/arrow.png);}

#rightMenu ul li.active{background-color:#f1f3f6;border-radius:3px;border:1px solid #aecff7;height:22px;line-height:22px;background-position:right -8px;padding:0 29px;}

#rightMenu ul ul{display:none;position:absolute;}

</style>

<script type="text/javascript">

var getOffset = {

    top: function (obj) {

        return obj.offsetTop + (obj.offsetParent ? arguments.callee(obj.offsetParent) : 0)

    },

    left: function (obj) {

        return obj.offsetLeft + (obj.offsetParent ? arguments.callee(obj.offsetParent) : 0)

    }

};

window.onload = function ()

{

    var oMenu = document.getElementById("rightMenu");

    var aUl = oMenu.getElementsByTagName("ul");

    var aLi = oMenu.getElementsByTagName("li");

    var showTimer = hideTimer = null;

    var i = 0;

    var maxWidth = maxHeight = 0;

    var aDoc = [document.documentElement.offsetWidth, document.documentElement.offsetHeight];

    oMenu.style.display = "none";

    for (i = 0; i < aLi.length; i++)

    {

        //为含有子菜单的li加上箭头

        aLi[i].getElementsByTagName("ul")[0] && (aLi[i].className = "sub");

        //鼠标移入

        aLi[i].onmouseover = function ()

        {

            var oThis = this;

            var oUl = oThis.getElementsByTagName("ul");

            //鼠标移入样式

            oThis.className += " active";            

            //显示子菜单

            if (oUl[0])

            {

                clearTimeout(hideTimer);

                showTimer = setTimeout(function ()

                {

                    for (i = 0; i < oThis.parentNode.children.length; i++)

                    {

                        oThis.parentNode.children[i].getElementsByTagName("ul")[0] &&

                        (oThis.parentNode.children[i].getElementsByTagName("ul")[0].style.display = "none");

                    }

                    oUl[0].style.display = "block";

                    oUl[0].style.top = oThis.offsetTop + "px";

                    oUl[0].style.left = oThis.offsetWidth + "px";

                    setWidth(oUl[0]);

                    //最大显示范围

                    maxWidth = aDoc[0] - oUl[0].offsetWidth;

                    maxHeight = aDoc[1] - oUl[0].offsetHeight;

                    //防止溢出

                    maxWidth < getOffset.left(oUl[0]) && (oUl[0].style.left = -oUl[0].clientWidth + "px");

                    maxHeight < getOffset.top(oUl[0]) && (oUl[0].style.top = -oUl[0].clientHeight + oThis.offsetTop + oThis.clientHeight + "px")

                },300);

            }

        };

        //鼠标移出

        aLi[i].onmouseout = function ()

        {

            var oThis = this;

            var oUl = oThis.getElementsByTagName("ul");

            //鼠标移出样式

            oThis.className = oThis.className.replace(/\s?active/,"");

            clearTimeout(showTimer);

            hideTimer = setTimeout(function ()

            {

                for (i = 0; i < oThis.parentNode.children.length; i++)

                {

                    oThis.parentNode.children[i].getElementsByTagName("ul")[0] &&

                    (oThis.parentNode.children[i].getElementsByTagName("ul")[0].style.display = "none");

                }

            },300);

        };

    }    

    //自定义右键菜单

    document.oncontextmenu = function (event)

    {

        var event = event || window.event;

        oMenu.style.display = "block";

        oMenu.style.top = event.clientY + "px";

        oMenu.style.left = event.clientX + "px";

        setWidth(aUl[0]);

        //最大显示范围

        maxWidth = aDoc[0] - oMenu.offsetWidth;

        maxHeight = aDoc[1] - oMenu.offsetHeight;

        //防止菜单溢出

        oMenu.offsetTop > maxHeight && (oMenu.style.top = maxHeight + "px");

        oMenu.offsetLeft > maxWidth && (oMenu.style.left = maxWidth + "px");

        return false;

    };

    //点击隐藏菜单

    document.onclick = function ()

    {

        oMenu.style.display = "none"

    };

    //取li中最大的宽度, 并赋给同级所有li

    function setWidth(obj)

    {

        maxWidth = 0;

        for (i = 0; i < obj.children.length; i++)

        {

            var oLi = obj.children[i];

            var iWidth = oLi.clientWidth - parseInt(oLi.currentStyle ? oLi.currentStyle["paddingLeft"] : getComputedStyle(oLi,null)["paddingLeft"]) * 2

            if (iWidth > maxWidth) maxWidth = iWidth;

        }

        for (i = 0; i < obj.children.length; i++) obj.children[i].style.width = maxWidth + "px";

    }

};

</script>

</head>

<body>

<center>自定义右键菜单，请在页面点击右键查看效果。</center>

<div id="rightMenu">

    <ul>

        <li><strong>JavaScript 学习</strong></li>

        <li>

            第一课

            <ul>

                <li>网页特效原理分析</li>

                <li>响应用户操作</li>

                <li>提示框效果</li>

                <li>事件驱动</li>

                <li>元素属性操作</li>

            </ul>

        </li>

        <li>

            第二课

            <ul>

                <li>改变网页背景颜色</li>

                <li>函数传参</li>

                <li>高重用性函数的编写</li>

                <li>126邮箱全选效果</li>

                <li>循环及遍历操作</li>

            </ul>

        </li>

        <li>

            第三课

            <ul>

                <li>

                    JavaScript组成

                    <ul>

                        <li>ECMAScript</li>

                        <li>DOM</li>

                        <li>BOM</li>

                        <li>JavaScript兼容性来源</li>

                    </ul>

                </li>

                <li>JavaScript出现的位置、优缺点</li>

                <li>变量、类型、typeof、数据类型转换、变量作用域</li>

                <li>

                    闭包

                    <ul>

                        <li>什么是闭包</li>

                        <li>简单应用</li>

                        <li>闭包缺点</li>

                    </ul>

                </li>

                <li>运算符</li>

                <li>程序流程控制</li>

                <li>

                    定时器的使用

                    <ul>

                        <li>setInterval</li>

                        <li>setTimeout</li>

                    </ul>

                </li>

            </ul>

        </li>

    </ul>

</div>

</body>

</html>

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