JS实现自定义右键菜单

<html>

<body oncontextmenu = showMenu('')>

<form name = "menuForm">

<!--隐藏框，用来保存选择的菜单的id值-->

<input type = "hidden" name = "id" value = "">

<table>

<tr><td><a href="javascript:clickMenu()" oncontextmenu = showMenu('0')>根目录</a></td></tr>

<tr><td><a href="javascript:clickMenu()" oncontextmenu = showMenu('1')>菜单一</a></td></tr>

<tr><td><a href="javascript:clickMenu()" oncontextmenu = showMenu('2')>菜单二</a></td></tr>

<tr><td  oncontextmenu = showMenu('2')>菜单二</td></tr>

</table>

</form>

<a href="javascript:window.location.href=''">go</a>

</body> 

<!-- 这里用来定义需要显示的右键菜单 -->

<div id="itemMenu" style="display:none">

<table border="1" width="100%" height="100%" bgcolor="#cccccc" style="border:thin" cellspacing="0">

<tr>

<td style="cursor:default;border:outset 1;" align="center" onclick="parent.create()">添加</td>

</tr>

<tr>

<td style="cursor:default;border:outset 1;" align="center" onclick="parent.update();">修改</td>

</tr>

<tr><td style="cursor:default;border:outset 1;" align="center" onclick="parent.del()"> 删除</td></tr>

</table>

</div>

<!-- 右键菜单结束-->

</html>

<script language="JavaScript">

function showMenu(id){

menuForm.id.value = id;

if("" == id){

}

else{

popMenu(itemMenu,100,"111");

}

event.returnValue=false;

event.cancelBubble=true;

return false;

}

/**


*显示弹出菜单


*menuDiv:右键菜单的内容


*width:行显示的宽度


*rowControlString:行控制字符串，0表示不显示，1表示显示，如“101”，则表示第1、3行显示，第2行不显示


*/

function popMenu(menuDiv,width,rowControlString){

//创建弹出菜单

var pop=window.createPopup();

//设置弹出菜单的内容

pop.document.body.innerHTML=menuDiv.innerHTML;

var rowObjs=pop.document.body.all[0].rows;

//获得弹出菜单的行数

var rowCount=rowObjs.length;

//循环设置每行的属性

for(var i=0;i<rowObjs.length;i++) {

//如果设置该行不显示，则行数减一

var hide=rowControlString.charAt(i)!='1';

if(hide){

rowCount--;

}

//设置是否显示该行

rowObjs[i].style.display=(hide)?"none":"";

//设置鼠标滑入该行时的效果

rowObjs[i].cells[0].onmouseover=function(){

this.style.background="#818181";

this.style.color="white";

}

//设置鼠标滑出该行时的效果

rowObjs[i].cells[0].onmouseout=function(){

this.style.background="#cccccc";

this.style.color="black";

}

}

//屏蔽菜单的菜单

pop.document.oncontextmenu=function(){

return false;

}

//选择右键菜单的一项后，菜单隐藏

pop.document.onclick=function(){

pop.hide();

}

//显示菜单

pop.show(event.clientX-1,event.clientY,width,rowCount*25,document.body);

return true;


}


function create(){

alert("create" + menuForm.id.value + "!");

}


function update(){

alert("update" + menuForm.id.value + "!");

}


function del(){

alert("delete" + menuForm.id.value + "!");

}


function clickMenu(){

alert("you click a menu!");

}

</script>

-----------------------------------------------------------------------------

<p style="margin: 10px auto; font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 13px; line-height: 20.799999237060547px;">在<a target=_blank href="http://www.51ditu.com/" target="_blank" style="color: rgb(7, 93, 179);">灵图</a>时做的，效果如下</p><p style="margin: 10px auto; font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 13px; line-height: 20.799999237060547px;"><img src="https://img-blog.youkuaiyun.com/20140608004605343?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvSGFja1Byb2dyYW1lcg==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast" alt="" />
</p><p style="margin: 10px auto; font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 13px; line-height: 20.799999237060547px;"> </p><p style="margin: 10px auto; font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 13px; line-height: 20.799999237060547px;">Demo效果图</p><p style="margin: 10px auto; font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 13px; line-height: 20.799999237060547px;"><img src="https://img-blog.youkuaiyun.com/20140608004636078?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvSGFja1Byb2dyYW1lcg==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast" alt="" />
</p><p style="margin: 10px auto; font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 13px; line-height: 20.799999237060547px;">Demo源码如下</p><div class="cnblogs_Highlighter" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 13px; line-height: 20.799999237060547px;"><div id="highlighter_778438" class="syntaxhighlighter  javascript" style="width: 979px; margin: 1em 0px !important; position: relative !important; overflow: auto !important; font-size: 1em !important;"><div class="line number1 index0 alt2" style="font-family: Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important; border: 0px !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; line-height: 1.8em !important; margin: 0px !important; outline: 0px !important; overflow: visible !important; padding: 0px 1em !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; width: auto !important; box-sizing: content-box !important; min-height: inherit !important; background: none rgb(244, 244, 244) !important;"><code class="javascript plain" style="white-space: pre-wrap; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important; border: 0px !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; line-height: 1.8em !important; margin: 0px !important; outline: 0px !important; overflow: visible !important; padding: 0px !important; position: static !important; right: auto !important; top: auto !important; vertical-align: baseline !important; width: auto !important; box-sizing: content-box !important; font-family: Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important; min-height: inherit !important; background: none !important;"></code></div></div></div>

<!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=gbk">
    <script src="js/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">
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        </div>
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        </div>
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    </div>
     
    <div id="container">      
        <p>右键此区域</p>
    </div>
  </body>
</html>