js实现完全自定义可带多级目录的网页鼠标右键菜单方法

作者：Eve Cole 更新时间：2025-05-18 07:32:02

本文实例讲述了js实现完全自定义可带多级目录的网页鼠标右键菜单方法。分享给大家供大家参考。具体分析如下：

这是很不错的一个网页鼠标特性，这个代码可以控制网页中鼠标的右键菜单，完全按照你的意思打造，可以带多级的目录显示。

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

<head>

<title>JS自定义网页多级导航菜单</title>

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(images/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(images/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>

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>

<ul>

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

<li>

武林网

<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>元素属性操作</li>

</ul>

</li>

<li>

www.VeVB.COm

<ul>

<li>改变网页背景颜色</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>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>

</ul>

</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>

希望本文所述对大家的javascript程序设计有所帮助。