PHP怎么用CSS实现二级菜单伸缩？

html-css019

PHP怎么用CSS实现二级菜单伸缩？,第1张

你像各大商城的二级菜单，都是用js做的，只有css不行的，当鼠标放到标签时，触发一个事件，这个事件可以把css改变，具体方法是当你鼠标移动到标签上，显示另一个区域，鼠标移除，把显示的区域隐藏。希望能帮助到你，代码的话去js网站会有代码和教程

两个解决办法

1、因为你的按钮和框不在一个层 确保它们在一个层就行了

2、js解决 在展开和收缩子菜单的js中 获得整个菜单框的高度 然后赋值给 按钮层的top

要代码的话 自己先把代码贴出来

<html>

<head>

<meta http-equiv="Content-Type" content="text/htmlcharset=gb2312">

<meta name="keywords" content="">

<style type=text/css>

table { border:0px}

td { font:normal 12px 宋体}

img { vertical-align:bottomborder:0px}

a { font:normal 12px 宋体color:#215DC6text-decoration:none}

a:hover { color:#428EFF }

/*

展开层的样式

**/

.sec_menu { border-left:1px solid #000000border-right:1px solid whiteborder-bottom:1px solid whiteoverflow:hiddenbackground:#D6DFF7}

/*

根节点字体样式控制

**/

.menu_title span { position:relativetop:2pxleft:8pxcolor:#215DC6font-weight:bold}

.menu_title2 span { position:relativetop:2pxleft:8pxcolor:#428EFFfont-weight:bold}

</style>

<script language=javascript>

function menuShow(obj,maxh,obj2)

{

if(obj.style.pixelHeight<maxh)

{

obj.style.pixelHeight+=maxh/20

obj.filters.alpha.opacity+=5

obj2.background="image/menudown.gif"

if(obj.style.pixelHeight==maxh/10)

obj.style.display='block'

myObj=obj

myMaxh=maxh

myObj2=obj2

setTimeout('menuShow(myObj,myMaxh,myObj2)','5')

}

}

function menuHide(obj,maxh,obj2)

{

if(obj.style.pixelHeight>0)

{

if(obj.style.pixelHeight==maxh/20)

obj.style.display='none'

obj.style.pixelHeight-=maxh/20

obj.filters.alpha.opacity-=5

obj2.background="image/menuup.gif"

myObj=obj

myMaxh=maxh

myObj2=obj2

setTimeout('menuHide(myObj,myMaxh,myObj2)','5')

}

else

if(whichContinue)

whichContinue.click()

}

function menuChange(obj,maxh,obj2)

{

if(obj.style.pixelHeight)

{

menuHide(obj,maxh,obj2)

whichOpen=''

whichcontinue=''

}

else

if(whichOpen)

{

whichContinue=obj2

whichOpen.click()

}

else

{

menuShow(obj,maxh,obj2)

whichOpen=obj2

whichContinue=''

}

}

</script>

<base target=main>

</head>

<body onselectstart="return false" ondragstart="return false" oncontextmenu="return false">

<table width=158 border="0" align=center cellpadding=0 cellspacing=0>

<tr style="cursor:hand">

<td height=25 background=image/menudown.gif class=menu_title id=menuTitle1 onClick="menuChange(menu1,80,menuTitle1)" onmouseover=this.className='menu_title2'onmouseout=this.className='menu_title'>

<span>系统选项</span>

</td>

</tr>

<tr>

<td>

<div class=sec_menu style="width:158pxheight:80pxfilter:alpha(Opacity=100)overflow:hidden" id=menu1>

<table cellpadding=0 cellspacing=0 align=center width=135 style="position:relativetop:10px">

<tr>

<td height=20>

<img src="image/nofollow.gif" width="15" height="15"><a href=../../3our.com/index.html onfocus=this.blur()>安全选项</a>

</td>

</tr>

<tr>

<td height=20>

<img src="image/nofollow.gif" width="15" height="15"><a href=../../3our.com/index.html onfocus=this.blur()>垃圾邮件选项</a>

</td>

</tr>

<tr>

<td height=20>

<img src="image/nofollow.gif" width="15" height="15"><a href=../../3our.com/index.html onfocus=this.blur()>

动态规则选项</a>

</td>

</tr>

</table>

</div>

</td>

</tr>

</table>

<script language=javascript>

var whichOpen=menuTitle1

var whichContinue=''

</script>

<table width=158 border="0" align=center cellpadding=0 cellspacing=0>

<tr style="cursor:hand">

<td height=25 background=image/menuup.gif class=menu_title id=menuTitle2 onClick="menuChange(menu2,120,menuTitle2)" onmouseover=this.className='menu_title2'onmouseout=this.className='menu_title'>

<span>系统规则</span>

</td>

</tr>

<tr>

<td>

<div class=sec_menu style="width:158height:0filter:alpha(Opacity=0)display:none" id=menu2>

<table cellpadding=0 cellspacing=0 align=center width=135 style="position:relativetop:10px">

<tr>

<td height=20>

<img src=image/nofollow.gif><a href=../../3our.com/index.html onfocus=this.blur()>

IP过滤规则</a>

</td>

</tr>

<tr>

<td height=20>

<img src=image/nofollow.gif><a href=../../3our.com/index.html onfocus=this.blur()>

信封过滤规则</a>

</td>

</tr>

<tr>

<td height=20>

<img src=image/nofollow.gif><a href=../../3our.com/index.html onfocus=this.blur()>

信头过滤规则</a>

</td>

</tr>

<tr>

<td height=20>

<img src=image/nofollow.gif><a href=../../3our.com/index.html onfocus=this.blur()>

信体过滤规则</a>

</td>

</tr>

<tr>

<td height=20>

<img src=image/nofollow.gif><a href=../../3our.com/index.html onfocus=this.blur()>

附件过滤规则</a>

</td>

</tr>

</table>

</div>

</td>

</tr>

</table>

<table width=158 border="0" align=center cellpadding=0 cellspacing=0>

<tr style="cursor:hand">

<td height=25 background=image/menuup.gif class=menu_title id=menuTitle3 onClick="menuChange(menu3,120,menuTitle3)" onmouseover=this.className='menu_title2'onmouseout=this.className='menu_title'>

<span>系统管理</span>

</td>

</tr>

<tr>

<td>

<div class=sec_menu style="width:158height:0filter:alpha(Opacity=0)display:none" id=menu3>

<table cellpadding=0 cellspacing=0 align=center width=135 style="position:relativetop:10px">

<tr>

<td height=20>

<img src=image/nofollow.gif><a href=../../3our.com/index.html onfocus=this.blur()>

用户管理</a>

</td>

</tr>

<tr>

<td height=20>

<img src=image/nofollow.gif><a href=../../3our.com/index.html onfocus=this.blur()>

进程管理</a>

</td>

</tr>

<tr>

<td height=20>

<img src=image/nofollow.gif><a href=../../3our.com/index.html onfocus=this.blur()>

主机运行状态</a>

</td>

</tr>

<tr>

<td height=20>

<img src=image/nofollow.gif><a href=../../3our.com/index.html onfocus=this.blur()>

数据备份</a>

</td>

</tr>

<tr>

<td height=20>

<img src=image/nofollow.gif><a href=../../3our.com/index.html onfocus=this.blur()>

垃圾目录管理</a>

</td>

</tr>

</table>

</div>

</td>

</tr>

</table>

<table width=158 border="0" align=center cellpadding=0 cellspacing=0>

<tr style="cursor:hand">

<td height=25 background=image/menuup.gif class=menu_title id=menuTitle4 onClick="menuChange(menu4,140,menuTitle4)" onmouseover=this.className='menu_title2'onmouseout=this.className='menu_title'>

<span>系统统计</span>

</td>

</tr>

<tr>

<td>

<div class=sec_menu style="width:158height:0filter:alpha(Opacity=0)display:none" id=menu4>

<table cellpadding=0 cellspacing=0 align=center width=135 style="position:relativetop:10px">

<tr>

<td height=20>

<img src=image/nofollow.gif><a href=../../3our.com/index.html onfocus=this.blur()>

IP过滤统计</a>

</td>

</tr>

<tr>

<td height=20>

<img src=image/nofollow.gif><a href=../../3our.com/index.html onfocus=this.blur()>

信封过滤统计</a>

</td>

</tr>

<tr>

<td height=20>

<img src=image/nofollow.gif><a href=../../3our.com/index.html onfocus=this.blur()>

信头过滤统计</a>

</td>

</tr>

<tr>

<td height=20>

<img src=image/nofollow.gif><a href=../../3our.com/index.html onfocus=this.blur()>

信体过滤统计</a>

</td>

</tr>

<tr>

<td height=20>

<img src=image/nofollow.gif><a href=../../3our.com/index.html onfocus=this.blur()>

附件过滤统计</a>

</td>

</tr>

<tr>

<td height=20>

<img src=image/nofollow.gif><a href=../../3our.com/index.html onfocus=this.blur()>

动态规则统计</a>

</td>

</tr>

</table>

</div>

</td>

</tr>

</table>

</body>

</html>