右键菜单实例
<!doctype html>
<html>
<head>
<!--声明当前页面的编码集：charset=gbk,gb2312(中文编码)，utf-8国际编码-->
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<!--当前页面的三要素-->
<title>右键菜单</title>
<meta name="Keywords" content="关键词,关键词">
<meta name="description" content="">
<link rel="shortcut icon" href="images/pifu2.jpg">
<!--css,js-->
<style type="text/css">
*{margin:0;padding:0;}
img{border:0;}
body{font-size:12px;font-family:"微软雅黑";color:#666;background:url("images/pifu2.jpg") no-repeat;}
/*menu start*/
#menu{width:200px;background:#fff;box-shadow:1px 1px 30px #ccc;display:none;position:absolute;top:0;left:0; }
#menu ul li{height:36px;line-height:36px;border-bottom:1px solid #ddd;padding-left:10px;list-style:none;font-size:14px;font-weight:500;}
#menu ul li:hover{background:#666;color:#fff;}
/*end start*/
</style>
</head>
<body>
<!--menu start-->
<div id="menu">
<ul>
<li >添加应用</li>
<li >获取课程</li>
<li >添加笔记</li>
<li >刷新</li>
<li >上传资料</li>
<li >更换背景</li>
<li >注销</li>
</ul>
</div>
<!--end menu-->
<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript">
// 屏蔽浏览器自带的右键
document.oncontextmenu = function(){
return false;
}
//鼠标键按下监控
$(document).mousedown(function(e){
//获取鼠标按下的键值
var key = e.which;
if(key == 3){
//获取当前鼠标光标的坐标
var x = e.clientX;
var y = e.clientY;
//获取弹出菜单的宽度和高度
var menuwidth=$("#menu").width();
var menuheight=$("#menu").height();
//alert(menuwidth+"===========>>"+menuheight);
//获取浏览器可视宽度和高度
var clientHeight=getClientHeight();
var clientWidth=getClientWidth();
//判断当光标靠边时，防止弹出菜单溢出浏览器可视范围
if((x+menuwidth)>clientWidth){x=clientWidth-menuwidth-10;}
if((y+menuheight)>clientHeight){y=clientHeight-menuheight-10;}
//为menu菜单定位
$("#menu").show().css({top:y,left:x});
}
});
//鼠标点击任意浏览器区域菜单消失
$(document).click(function(){
//alert(0);
$("#menu").hide();
});
// 浏览器的可见高度
function getClientHeight() {
var clientHeight = 0;
if (document.body.clientHeight && document.documentElement.clientHeight) {
clientHeight = (document.body.clientHeight < document.documentElement.clientHeight) ? document.body.clientHeight: document.documentElement.clientHeight;
} else {
clientHeight = (document.body.clientHeight > document.documentElement.clientHeight) ? document.body.clientHeight: document.documentElement.clientHeight;
}
return clientHeight;
}
// 浏览器的可见宽度
function getClientWidth() {
var clientWidth = 0;
if (document.body.clientWidth && document.documentElement.clientWidth) {
clientWidth = (document.body.clientWidth < document.documentElement.clientWidth) ? document.body.clientWidth: document.documentElement.clientWidth;
} else {
clientWidth = (document.body.clientWidth > document.documentElement.clientWidth) ? document.body.clientWidth: document.documentElement.clientWidth;
}
return clientWidth;
}
//鼠标点击菜单选项添加事件
$("#menu li").click(function(){
var li_index=$(this).index();
alert($(this).text());
});
</script>
</body>
</html>
