请大家看看为什么这个弹出目录会有这样的问题:当鼠标移动到第一个目录项时,会显示一个隐藏的层,这个层应该覆盖下面的内容,但事实确实下面的内容穿透过来了,不知道为什么如果我讲的不清楚,请把下面的代码保存成htm,即可看到效果:<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default16.aspx.cs" Inherits="Default16" %>
<!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" xml:lang="en" lang="en"><head>
<script language="javascript" type="text/javascript" >
function MakeVisibilityHidden(elementName)
{
var el = document.getElementById(elementName);
el.style.visibility = 'hidden';
}
function MakeVisibilityVisible(elementName)
{
var el = document.getElementById(elementName);
el.style.visibility = 'inherit';
}
</script><style type="text/css">
body {
font-size: 10pt;
font-family: Arial;
}
.CssPopUpMenuContainer {
height: 20px;
position: relative;
z-index: 98;
}
.CssPopUpMenuContainerWithoutZIndex {
height: 20px;
position: relative;
}
.CssPopUpMenu {
position: absolute;
display: block;
visibility: hidden;
width: 300px;
background-color: #EEEEEE;
padding: 2px;
top: 19px;
left: 0px;
border: solid 1px #AAAAAA;
z-index: 99;
}
</style>
</head>
<body>
<table cellspacing="0" cellpadding="3" rules="all" border="1"
style="background-color:White; font-size:9pt; border-collapse:collapse;">
<tr>
<td>
<div id="PopUpMenuContainer4" class="CssPopUpMenuContainerWithoutZIndex"
onmouseover='MakeVisibilityVisible("PopUpMenu4"); this.style.backgroundColor="silver";'
onmouseout='MakeVisibilityHidden("PopUpMenu4"); this.style.backgroundColor="Transparent";' >
MouseOverHere
<div id="PopUpMenu4" class="CssPopUpMenu" >
<p>Line 1 - My awesome popup menu.</p>
<p>Line 2 - I sure wish I could figure this out.</p>
<p>Line 3 - Why is this so hard?</p>
</div>
</div>
</td>
</tr>
<tr>
<td>
<div id="PopUpMenuContainer5" class="CssPopUpMenuContainerWithoutZIndex"
onmouseover='MakeVisibilityVisible("PopUpMenu5"); this.style.backgroundColor="silver";'
onmouseout='MakeVisibilityHidden("PopUpMenu5"); this.style.backgroundColor="Transparent";' >
MouseOverHere
<div id="PopUpMenu5" class="CssPopUpMenu" >
<p>Line 1 - My awesome popup menu.</p>
<p>Line 2 - I sure wish I could figure this out.</p>
<p>Line 3 - Why is this so hard?</p>
</div>
</div>
</td>
</tr>
<tr>
<td>
</td>
</tr>
</table></body>
</html>
<!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" xml:lang="en" lang="en"><head>
<script language="javascript" type="text/javascript" >
function MakeVisibilityHidden(elementName)
{
var el = document.getElementById(elementName);
el.style.visibility = 'hidden';
}
function MakeVisibilityVisible(elementName)
{
var el = document.getElementById(elementName);
el.style.visibility = 'inherit';
}
</script><style type="text/css">
body {
font-size: 10pt;
font-family: Arial;
}
.CssPopUpMenuContainer {
height: 20px;
position: relative;
z-index: 98;
}
.CssPopUpMenuContainerWithoutZIndex {
height: 20px;
position: relative;
}
.CssPopUpMenu {
position: absolute;
display: block;
visibility: hidden;
width: 300px;
background-color: #EEEEEE;
padding: 2px;
top: 19px;
left: 0px;
border: solid 1px #AAAAAA;
z-index: 99;
}
</style>
</head>
<body>
<table cellspacing="0" cellpadding="3" rules="all" border="1"
style="background-color:White; font-size:9pt; border-collapse:collapse;">
<tr>
<td>
<div id="PopUpMenuContainer4" class="CssPopUpMenuContainerWithoutZIndex"
onmouseover='MakeVisibilityVisible("PopUpMenu4"); this.style.backgroundColor="silver";'
onmouseout='MakeVisibilityHidden("PopUpMenu4"); this.style.backgroundColor="Transparent";' >
MouseOverHere
<div id="PopUpMenu4" class="CssPopUpMenu" >
<p>Line 1 - My awesome popup menu.</p>
<p>Line 2 - I sure wish I could figure this out.</p>
<p>Line 3 - Why is this so hard?</p>
</div>
</div>
</td>
</tr>
<tr>
<td>
<div id="PopUpMenuContainer5" class="CssPopUpMenuContainerWithoutZIndex"
onmouseover='MakeVisibilityVisible("PopUpMenu5"); this.style.backgroundColor="silver";'
onmouseout='MakeVisibilityHidden("PopUpMenu5"); this.style.backgroundColor="Transparent";' >
MouseOverHere
<div id="PopUpMenu5" class="CssPopUpMenu" >
<p>Line 1 - My awesome popup menu.</p>
<p>Line 2 - I sure wish I could figure this out.</p>
<p>Line 3 - Why is this so hard?</p>
</div>
</div>
</td>
</tr>
<tr>
<td>
</td>
</tr>
</table></body>
</html>
<!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" xml:lang="en" lang="en"><head>
<script language="javascript" type="text/javascript" >
function MakeVisibilityHidden(elementName)
{
var el = document.getElementById(elementName);
el.style.visibility = 'hidden';
}
function MakeVisibilityVisible(elementName)
{
var el = document.getElementById(elementName);
el.style.visibility = 'inherit';
}
</script><style type="text/css">
body {
font-size: 10pt;
font-family: Arial;
}
.CssPopUpMenuContainer {
height: 20px;
position: relative;
z-index: 98;
}
.CssPopUpMenuContainerWithoutZIndex {
height: 20px;
position: relative;
}
.CssPopUpMenu {
display: block;
visibility: hidden;
width: 300px;
background-color: #EEEEEE;
padding: 2px;
top: 19px;
left: 0px;
border: solid 1px #AAAAAA;
z-index: 99;
}
</style>
</head>
<body>
<table cellspacing="0" cellpadding="3" rules="all" border="1"
style="background-color:White; font-size:9pt; border-collapse:collapse;">
<tr>
<td>
<div id="PopUpMenuContainer4" class="CssPopUpMenuContainerWithoutZIndex"
onmouseover='MakeVisibilityVisible("PopUpMenu4"); this.style.backgroundColor="silver";'
onmouseout='MakeVisibilityHidden("PopUpMenu4"); this.style.backgroundColor="Transparent";' >
MouseOverHere
<div id="PopUpMenu4" class="CssPopUpMenu" >
<p>Line 1 - My awesome popup menu.</p>
<p>Line 2 - I sure wish I could figure this out.</p>
<p>Line 3 - Why is this so hard?</p>
</div>
</div>
</td>
</tr>
<tr>
<td>
<div id="PopUpMenuContainer5" class="CssPopUpMenuContainerWithoutZIndex"
onmouseover='MakeVisibilityVisible("PopUpMenu5"); this.style.backgroundColor="silver";'
onmouseout='MakeVisibilityHidden("PopUpMenu5"); this.style.backgroundColor="Transparent";' >
MouseOverHere
<div id="PopUpMenu5" class="CssPopUpMenu" >
<p>Line 1 - My awesome popup menu.</p>
<p>Line 2 - I sure wish I could figure this out.</p>
<p>Line 3 - Why is this so hard?</p>
</div>
</div>
</td>
</tr>
<tr>
<td>
</td>
</tr>
</table></body>
</html>
PopUpMenu5这两个DIV放到外面来就能遮住了!
继续期待高手帮忙