右键菜单的淡入淡出效,JavaScript

<HTML><HEAD><TITLE>右键菜单的淡入淡出效

果</TITLE>
<META content="text/html; charset=gb2312"

http-equiv=Content-Type>
<SCRIPT language=JavaScript>
<!-- // RightClickMenu
var intDelay=5; //设置菜单显示速度，越大越慢
var intInterval=10; //每次更改的透明度
function showmenuie5(){
var

rightedge=document.body.clientWidth-event.clientX
var

bottomedge=document.body.clientHeight-event.clien

tY
if (rightedge<ie5menu.offsetWidth)

ie5menu.style.left=document.body.scrollLeft+event

.clientX-ie5menu.offsetWidth
else

ie5menu.style.left=document.body.scrollLeft+event

.clientX
if (bottomedge<ie5menu.offsetHeight)

ie5menu.style.top=document.body.scrollTop+event.c

lientY-ie5menu.offsetHeight
else

ie5menu.style.top=document.body.scrollTop+event.c

lientY
        ie5menu.style.visibility="visible"
        //ie5menu.style.visibility=""
        ie5menu.filters.alpha.opacity=0
        GradientShow()
        return false
}
function hidemenuie5(){
        //ie5menu.style.visibility="hidden"
        GradientClose()
}
function highlightie5(){
        if

(event.srcElement.className=="menuitems"){

event.srcElement.style.backgroundColor="highlight

"
            event.srcElement.style.color="white"
        }
}
function lowlightie5(){
        if

(event.srcElement.className=="menuitems"){

event.srcElement.style.backgroundColor=""

event.srcElement.style.color="#000000"
}
}
function jumptoie5(){
if

(event.srcElement.className=="menuitems"){
if (event.srcElement.url != ''){
if

(event.srcElement.getAttribute("target")!=null)

window.open(event.srcElement.url,event.srcElement

.getAttribute("target"))
else

window.location=event.srcElement.url
}
}
}

function GradientShow() //实现淡入的函数
{
ie5menu.filters.alpha.opacity+=intInterval
if (ie5menu.filters.alpha.opacity<100)

setTimeout("GradientShow()",intDelay)
}

function GradientClose() //实现淡出的函数
    {
    ie5menu.filters.alpha.opacity-=intInterval
    if (ie5menu.filters.alpha.opacity>0) {
     setTimeout("GradientClose()",intDelay)
     }
    else {
     ie5menu.style.visibility="hidden"
     }
}

function ChangeBG() //改变菜单项的背景颜色，这里

的两种颜色值可以改为你需要的
{
    oEl=event.srcElement
    if (oEl.style.background!="navy") {
        oEl.style.background="navy"
    }
    else {
        oEl.style.background="#cccccc"
    }
}
// -->
</SCRIPT>

<STYLE type=text/css>
.cMenu {
FILTER: alpha(opacity=0);BACKGROUND-COLOR:

#D6D3CE;BORDER-BOTTOM: #666666 2px solid;

BORDER-LEFT: #E4E4E4 2px solid; BORDER-RIGHT:

#666666 2px solid; BORDER-TOP: #E4E4E4 2px solid;

COLOR: #000000; CURSOR: default; FONT-SIZE: 9pt;

color:#000000;FONT-WEIGHT: normal; LINE-HEIGHT:

20px; POSITION: absolute; VISIBILITY: hidden;

WIDTH: 110px
}
.menuitems {
    font-size:9pt;
    MARGIN: 2px;
    PADDING-BOTTOM: 0px;
PADDING-LEFT: 15px;
PADDING-RIGHT: 3px;
PADDING-TOP: 0px;
}
</STYLE>

<META content="Microsoft FrontPage 4.0"

name=GENERATOR>
</HEAD>
<BODY>
<OBJECT

classid=CLSID:8856F961-340A-11D0-A96B-00C04FD705A

2 height=0 id=WebBrowser width=0>
</OBJECT>
<RIGHTCLICK><!--[if IE]>
<DIV class=cMenu id=ie5menu onclick=jumptoie5()

onmouseout=lowlightie5()
onmouseover=highlightie5()>

<DIV class=menuitems

url="javascript:click_obj(0)">后退</DIV>
<DIV class=menuitems

url="javascript:click_obj(1)">前进</DIV>
<DIV class=menuhr><hr style="width:100%"></DIV>
<DIV class=menuitems

url="javascript:click_obj(2)">刷新</DIV>
<DIV class=menuitems

url="javascript:click_obj(3)">加入收藏夹</DIV>
<DIV class=menuitems

url="javascript:click_obj(4)">查看源文件</DIV>
<DIV class=menuhr><hr style="width:100%"></DIV>
<DIV class=menuitems

url="javascript:click_obj(5)">属性</DIV>

</DIV>
<![endif]-->

<SCRIPT language=JavaScript>
<!--
function click_obj(id){
    switch(id){
        case 0:
            history.back()
            break
        case 1:
            history.forward()
            break
        case 2:
            window.location.reload()
            break
        case 3:

window.external.AddFavorite(location.href,

document.title)
            break
        case 4:
            window.location = "view-source:" +

window.location.href
            break
        case 5:
            document.all.WebBrowser.ExecWB(10,1)
            break
    }
}

if (document.all&&window.print){
    ie5menu.className="cMenu"
    document.oncontextmenu=showmenuie5
    document.body.onclick=hidemenuie5
}
//-->
</SCRIPT>
</RIGHTCLICK>
</BODY></HTML>