怎么样通过Javascript实现简单右键菜单类？
本文实例讲述了Javascript实现的简单右键菜单类。分享给大家供大家参考。具体如下：
这是自己写的一个右键菜单类，屏蔽掉了IE固有的右键菜单，一共有四个参数：第一个是出发显示右键菜单的div的id
第二个是右键菜单这个层的id，根据这个id去创建一个新的层，menuList是菜单项的列表，对应了点击一个菜单项后触发的函数，classList是菜单的class名称，以及菜单项对应的class名称，包含了鼠标滑过时的class。
运行效果截图如下：
在线演示地址如下：
http://demo.jb51.net/js/2015/js-right-button-menu-class-codes/
具体代码如下：
<!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=gb2312" />
<title>右键菜单</title>
<style type="text/css">
.cmenu
{
position:absolute;
top:100px;
left:100px;
width:200px;
height:200px;
background-color:white;
border:1px solid pink;
}
.liAble
{
font-family:"宋体";
color:#6699CC;
margin-left:10px;
margin-top:5px;
list-style-type:none;
cursor:default;
}
.liMouseOver
{
margin-left:10px;
margin-top:5px;
background-color:#CCFFFF;
list-style-type:none;
cursor:default;
}
</style>
</head>
<body>
<div style="margin-left:auto; margin-right:auto; height:300px; width:60%;background-color:#CC6699" id="x">
</div>
<input type="hidden" id="value1" value="4" />
<input type="hidden" id="value2" value="5" />
<script type="text/javascript">
//右键菜单类
function RightHandMenu(div,menuDiv,menuList,classList)
{
var oThis = this;
this._menuList =
{
}
this._classList =
{
objClass:'',
MenuClass:'',
liAbleClass:'',
liMouseOverClass:''
}
this.Init = function()
{
this._obj = $(div);
this._obj.oncontextmenu = function(e){oThis.ShowMenu(e)};
this._obj.className = this._classList.objClass;
document.onclick = function(){oThis.HiddenMenu()};
objToObj(this._classList, classList);
objToObj(this._menuList, menuList);
}
this.CreateMenu = function()
{
if($(menuDiv))
{
alert("该ID已被占用");
return;
}
this._menu = document.createElement("DIV");
this._menu.id = menuDiv;
this._menu.oncontextmenu = function(e){stopBubble(e)};
this._menu.className = this._classList.MenuClass;
this._menu.style.display = "none";
document.body.appendChild(this._menu);
}
this.CreateMenuList = function()
{
for(var pro in this._menuList)
{
var li = document.createElement("LI");
li.innerHTML = pro;
this._menu.appendChild(li);
li.className = this._classList.liAbleClass;
li.onclick = this._menuList[pro];
li.onmouseover = function(){oThis.ChangeLiClass(this,oThis._classList.liMouseOverClass)}
li.onmouseout = function(){oThis.ChangeLiClass(this,oThis._classList.liAbleClass)}
}
}
this.ChangeLiClass = function(obj,name)
{
obj.className = name
}
this.ShowMenu = function(e)
{
var e = e || window.event;
stopBubble(e);
var offsetX = e.clientX;
var offsetY = e.clientY;
with(this._menu.style)
{
display = "block";
top = offsetY + "px";
left = offsetX + "px";
}
}
this.HiddenMenu = function()
{
this._menu.style.display = "none";
}
this.Init();
this.CreateMenu();
this.CreateMenuList();
}
function stopBubble(oEvent)
{
if(oEvent.stopPropagation) oEvent.stopPropagation();
else oEvent.cancelBubble = true;
if(oEvent.preventDefault) oEvent.preventDefault();
else oEvent.returnValue = false;
}
function $(div)
{
return 'string' == typeof div ? document.getElementById(div) : div;
}
function objToObj(destination,source)
{
for(var pro in source)
{
destination[pro] = source[pro];
}
return destination;
}
//构造右键菜单
function Edit()
{
alert("edit");
}
function Delete()
{
alert("delete");
}
var menuList =
{
编辑:Edit,
删除:Delete
}
var classList =
{
MenuClass:'cmenu',
liAbleClass:'liAble',
liMouseOverClass:'liMouseOver'
}
var x = new RightHandMenu("x","testDiv",menuList,classList)
</script>
</body>
</html>
希望本文所述对大家的JavaScript程序设计有所帮助。
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