<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>demo</title>
<style type="text/css">
html{
height:100%;
}
body{
height:100%;
}
#mydiv{
width:300px;
height:300px;
background-color: #ff7400;
}
#ctxMenu{
background-color: #ff7400;
list-style-type: none;
position: absolute;
padding:0px;
border:1px solid #000;
visibility: hidden;
}
</style>
</head>
<body>
<div id="mydiv"></div>
<h2 id="show"></h2>
<input type="text"id="txt"><span id="help"></span>
<ul id="ctxMenu">
<li>上传</li>
<li>下载</li>
<li>新建</li>
<li>取消</li>
</ul>
<script type="text/javascript">
var $=function(id){
return document.getElementById(id);
};
var h2=$("show");
var ctx=$("ctxMenu");
var txt=$("txt");
var help=$("help");
/*
txt.onfocus=function(){
help.innerHTML="请输入金额";
}
txt.onkeydown=function(event){
help.innerHTML="";
var code=event.keyCode;
if(!(code>=48&&code<=57||code>=96&&code<=105||code==46||code==8||code==13||code==37||code==39||code==110||code==190)){
event.preventDefault();
}
}
*/
document.body.oncontextmenu=function(event){
event.preventDefault();
var x=event.pageX;
var y=event.pageY;
ctx.style.left=x+"px";
ctx.style.top=y+"px";
ctx.style.visibility="visible";
}
document.body.onclick=function(){
ctx.style.visibility="hidden";
}
/*
document.body.onmousemove=function(event){
var x=event.pageX;
var y=event.pageY;
h2.innerHTML=x+":"+y;
}
*/
window.onbeforeunload=function(){
var v=$("txt").value;
if(v){
return "";
}
}
$("mydiv").onclick=function(){
$("show").innerHTML="click";
};
$("mydiv").ondblclick=function(){
$("show").innerHTML="dblclick";
};
$("mydiv").onmouseover=function(){
$("show").innerHTML="mouseover";
this.style.backgroundColor="#2d2d2d";
};
$("mydiv").onmouseout=function(){
$("show").innerHTML="mouseout";
this.style.backgroundColor="pink";
}
</script>
</body>
</html>
转载：纯js右键菜单 | 菜鸟工具
https://c.runoob.com/codedemo/4954/
