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首页 > web前端 > js教程 > JS实现的自定义右键菜单实例二则_javascript技巧

JS实现的自定义右键菜单实例二则_javascript技巧

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发布： 2016-05-16 15:41:11
原创
1164 人浏览过

本文实例讲述了JS实现的自定义右键菜单。分享给大家供大家参考。具体如下：

示例1：

运行效果截图：

具体代码如下：

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<!DOCTYPE html>

<html>

 <head>

 <title>JS实现自定义右键菜单</title>

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

 <script src="ajax.js"></script>

 <style type="text/css">

 #container {

  text-align : center;

  width : 500px;

  height : 500px;

  border : 1px solid blue;

  margin : 0 auto;

 }

 .skin {

  width : 100px;

  border : 1px solid gray;

  padding : 2px;

  visibility : hidden;

  position : absolute;

 }

 div.menuitems {

  margin : 1px 0;

 }

 div.menuitems a {

  text-decoration : none;

 }

 div.menuitems:hover {

  background-color : #c0c0c0;

 }

 </style>

<script>

window.onload = function() {

 var container = document.getElementById('container');

 var menu = document.getElementById('menu');

 /*显示菜单*/

 function showMenu() {

 var evt = window.event || arguments[0];

 /*获取当前鼠标右键按下后的位置，据此定义菜单显示的位置*/

 var rightedge = container.clientWidth-evt.clientX;

 var bottomedge = container.clientHeight-evt.clientY;

 /*如果从鼠标位置到容器右边的空间小于菜单的宽度，就定位菜单的左坐标（Left）为当前鼠标位置向左一个菜单宽度*/

 if (rightedge < menu.offsetWidth) 

  menu.style.left = container.scrollLeft + evt.clientX - menu.offsetWidth + "px"; 

 else

 /*否则，就定位菜单的左坐标为当前鼠标位置*/

  menu.style.left = container.scrollLeft + evt.clientX + "px";

 /*如果从鼠标位置到容器下边的空间小于菜单的高度，就定位菜单的上坐标（Top）为当前鼠标位置向上一个菜单高度*/

 if (bottomedge < menu.offsetHeight)

  menu.style.top = container.scrollTop + evt.clientY - menu.offsetHeight + "px";

 else

 /*否则，就定位菜单的上坐标为当前鼠标位置*/

  menu.style.top = container.scrollTop + evt.clientY + "px";

 /*设置菜单可见*/

 menu.style.visibility = "visible"; 

 LTEvent.addListener(menu,"contextmenu",LTEvent.cancelBubble);

 }

 /*隐藏菜单*/

 function hideMenu() {

 menu.style.visibility = 'hidden';

 }   

 LTEvent.addListener(container,"contextmenu",LTEvent.cancelBubble);

 LTEvent.addListener(container,"contextmenu",showMenu);

 LTEvent.addListener(document,"click",hideMenu);  

}

</script>

 </head>

 <body>

 <div id="menu" class="skin">

 <div class="menuitems">

  <a href="javascript:history.back();">后退</a>

 </div>

 <div class="menuitems">

  <a href="javascript:history.back();">前进</a>

 </div>

 <hr>

 <div class="menuitems">

  <a href="" target="_blank">地图api</a>

 </div>

 <div class="menuitems">

  <a href="" target="_blank">实时交通</a>

 </div>

 <div class="menuitems">

  <a href="" target="_blank">地图搜索</a>

 </div>

 <div class="menuitems">

  <a href="" target="_blank">驾驶导航</a>

 </div>

 <hr>

 <div class="menuitems">

  <a href="" target="_blank">灵图UU</a>

 </div>

 <div class="menuitems">

  <a href="" target="_blank">路书下载</a>

 </div>

 <hr>

 <div class="menuitems">

  <a href="" target="_blank">关于本站</a>

 </div>

 <div class="menuitems">

  <a href="" target="_bland">友情链接</a>

 </div>

 </div>

 <div id="container">

 <p>右键此区域</p>

 </div>

 </body>

</html>

登录后复制

其中ajax.js代码如下：

复制代码 代码如下:

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iq=D();iq.open(q[4],yq,true);iq.onreadystatechange=function(){if(iq.readyState!=4){return;};var oq=iq.responseXML.xml?iq.responseXML:L(iq.responseText);uq(oq);};iq.send(null);};function G(yq,uq,iq){iq=iq?iq:q[6];var oq=I();c(oq,q[10],function(pq){if(pq.n==q[9]&&pq.a.src==q[3]){return;};var aq=X(pq);uq.apply(null,[aq]);});oq.load(i._LT_ajax_proxyXmlUrl+q[2]+encodeURIComponent(encodeURIComponent(yq))+q[1]+iq);};function H(yq,uq){var iq=D();iq.open(q[4],yq,true);iq.onreadystatechange=function(){if(iq.readyState!=4){return;};uq(iq.responseText);};iq.send(null);};function J(yq,uq,iq){var oq=iq?iq.toLowerCase()==q[0]?q[0]:pq:q[4];var aq=D();aq.open(oq,yq,true);aq.onreadystatechange=function(){if(aq.readyState!=4){return;};uq(eval('('+aq.responseText+')'));};aq.send(null);};function K(yq,uq,iq){iq=iq?iq:q[6];var oq=I();c(oq,q[10],function(pq){if(pq.n==q[9]&&pq.a.src==q[3]){return;};uq.apply(null,[A(pq)]);});oq.load(i._LT_ajax_proxyTextUrl+q[2]+encodeURIComponent(encodeURIComponent(yq))+q[1]+iq);};function L(yq){var uq;if(typeof(ActiveXObject)!=q[5]&&typeof(GetObject)!=q[5]){try{uq=new ActiveXObject("Msxml2.DOMDocument");}catch(iq){uq=new ActiveXObject("Msxml.DOMDocument");};if(yq){uq.loadXML(yq);};}else{if(yq){if(typeof DOMParser!=q[5]){uq=new DOMParser().parseFromString(yq,"text/xml")};}else{if(o.implementation&&o.implementation.createDocument){uq=o.implementation.createDocument(q[7],q[7],null);};};};return uq;};function Z(yq,uq){if(!uq){yq.i={};uq=yq;};if(yq.a.id){uq.i[yq.a.id]=yq;};for(var iq=0;iq=3&&sq<=6){var dq=yq.childNodes[oq].nodeValue;if(!iq.t&&!new RegExp("^[\\s]+$").test(dq)){iq.t=dq;};};if(sq==1){uq=uq?uq:iq;iq.c.push(V(yq.childNodes[oq],uq));};};return iq;};function B(yq,uq){var iq,oq=false;if(typeof yq.xml!=q[5]){try{iq=yq.selectNodes(uq);}catch(pq){oq=true;};}else{oq=true;};if(!oq){return iq;};var aq=yq.ownerDocument?yq.ownerDocument:yq;var sq=aq.createNSResolver(aq.documentElement);var dq=aq.evaluate(uq,yq,sq,XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,null);iq=[];for(var fq=0;fq>2);uq+=tq.base64EncodeChars.charAt((pq&0x3)<<4);uq+="==";break;};aq=yq.charCodeAt(iq++);if(iq==oq){uq+=tq.base64EncodeChars.charAt(pq>>2);uq+=tq.base64EncodeChars.charAt(((pq&0x3)<<4)|((aq&0xF0)>>4));uq+=tq.base64EncodeChars.charAt((aq&0xF)<<2);uq+="=";break;};sq=yq.charCodeAt(iq++);uq+=tq.base64EncodeChars.charAt(pq>>2);uq+=tq.base64EncodeChars.charAt(((pq&0x3)<<4)|((aq&0xF0)>>4));uq+=tq.base64EncodeChars.charAt(((aq&0xF)<<2)|((sq&0xC0)>>6));uq+=tq.base64EncodeChars.charAt(sq&0x3F);};return uq;},base64decode:function(yq){var e=this;var uq,iq,oq,pq;var aq,sq,dq;sq=yq.length;aq=0;dq=q[7];while(aq>4));do{oq=yq.charCodeAt(aq++)&0xff;if(oq==61)return 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示例2：

运行效果截图如下：

具体代码如下：

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<!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>自定义右键菜单</title>

<style type="text/css">

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

body{font:12px/24px arial;}

#menu{position:absolute;top:-9999px;left:-9999px;width:100px;border-radius:3px;list-style-type:none;border:1px solid #8f8f8f;padding:2px;background:#fff;}

#menu li{position:relative;height:24px;padding-left:24px;background:#eaead7;vertical-align:top;}

#menu li a{display:block;color:#333;background:#fff;padding-left:5px;text-decoration:none;}

#menu li.active{background:#999;}

#menu li.active a{color:#fff;background:#8f8f8f;}

#menu li em{position:absolute;top:0;left:0;width:24px;height:24px;background:url(images/ico.png) no-repeat;}

#menu li em.cur{background-position:0 0;}

#menu li em.copy{background-position:0 -24px;}

#menu li em.paste{background-position:0 -48px;}

</style>

<script type="text/javascript">

window.onload = function ()

{

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

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

 //加载后隐藏自定义右键菜单

 oMenu.style.display = "none";

 //菜单鼠标移入/移出样式

 for (i = 0; i < aLi.length; i++)

 {

 //鼠标移入样式

 aLi[i].onmouseover = function ()

 {

  this.className = "active"

 };

 //鼠标移出样式

 aLi[i].onmouseout = function ()

 {

  this.className = ""

 }

 }

 //自定义菜单

 document.oncontextmenu = function (event)

 {

 var event = event || window.event;

 var style = oMenu.style;

 style.display = "block";

 style.top = event.clientY + "px";

 style.left = event.clientX + "px";

 return false;

 };

 //页面点击后自定义菜单消失

 document.onclick = function ()

 {

 oMenu.style.display = "none"

 }

};

</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 id="menu">

 <li><em class="cut"></em><a href="javascript:;">剪切</a></li>

 <li><em class="copy"></em><a href="javascript:;">复制</a></li>

 <li><em class="paste"></em><a href="javascript:;">粘贴</a></li>

</ul>

</body>

</html>

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完整实例代码点击此处本站下载。

希望本文所述对大家的javascript程序设计有所帮助。

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js 右键菜单 自定义
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