27、逐显效果下拉菜单
类别: JavaScript教程 
====1、将以下代码加入HTML的<head></head>之间：
<style>
<!--
#iewrap{
position:relative;
height:30px
}
#iewrap2{
position:absolute
}
#dropmenu03{
filter:revealTrans(Duration=1.5,Transition=12)
visibility:hide
}
a:hover { color: #FF0000}
body { font-family: "宋体"; font-size: 9pt; text-decoration: none}
a { font-family: "宋体"; font-size: 9pt; text-decoration: none}
-->
</style>
====2、将以下代码加入HTML的<body></body>之间：
<ilayer id="dropmenu01" height=35px>
<layer id="dropmenu02" visibility=show>
<span id="iewrap">
<span id="iewrap2" onClick="dropit2();event.cancelBubble=true;return false">
<font face="宋体"><a href="#">点这里看本站栏目</a></font>
</span>
</span>
</layer>
</ilayer>
<script language="JavaScript1.2">
//如果想关闭 "fade"（消隐）效果，将如下参数设置成false，适用于IE用户。
var enableeffect=true
//将如下数组修改成你自己的。
var selection=new Array()
selection[0]=\'<font face="宋体"><a href="link1.htm">link1</a></font><br>\'
selection[1]=\'<font face="宋体"><a href="link2.htm">link2</a></font><br>\'
selection[2]=\'<font face="宋体"><a href="link3.htm">link3</a></font><br>\'
selection[3]=\'<font face="宋体"><a href="link4.htm">link4</a></font><br>\'
selection[4]=\'<font face="宋体"><a href="link5.htm">link5</a></font>\'
if (document.layers)
document.dropmenu01.document.dropmenu02.visibility=\'show\'
function dropit2(){
if (document.all){
dropmenu03.style.left=document.body.scrollLeft+event.clientX-event.offsetX
dropmenu03.style.top=document.body.scrollTop+event.clientY-event.offsetY+18
if (dropmenu03.style.visibility=="hidden"){
if (enableeffect)
dropmenu03.filters.revealTrans.apply()
dropmenu03.style.visibility="visible"
if (enableeffect)
dropmenu03.filters.revealTrans.play()
}
else{
hidemenu()
}
}
}
function dropit(e){
if (document.dropmenu03.visibility=="hide")
document.dropmenu03.visibility="show"
else
document.dropmenu03.visibility="hide"
document.dropmenu03.left=e.pageX-e.layerX
document.dropmenu03.top=e.pageY-e.layerY+19
return false
}
function hidemenu(){
if (enableeffect)
dropmenu03.filters.revealTrans.stop()
dropmenu03.style.visibility="hidden"
}
function hidemenu2(){
document.dropmenu03.visibility="hide"
}
if (document.layers){
document.dropmenu01.document.dropmenu02.captureEvents(Event.CLICK)
document.dropmenu01.document.dropmenu02.onclick=dropit
}
else if (document.all)
document.body.onclick=hidemenu
</script>
====3、将以下代码加入HEML的<body></body>之间：[第2步的下面位置]
<!-- 你可以改变菜单出现的外观风格-->
<div id="dropmenu03" style="position:absolute;left:0;top:0;layer-background-color:seashell;background-color:seashell;width:100;visibility:hidden;border:1px solid black;padding:0px">
<script language="JavaScript1.2">
if (document.all)
dropmenu03.style.padding=\'4px\'
for (i=0;i<selection.length;i++)
document.write(selection[i])
</script>
</div>
<script language="JavaScript1.2">
if (document.layers){
document.dropmenu03.captureEvents(Event.CLICK)
document.dropmenu03.onclick=hidemenu2
}
</script>
<style>
<!--
#iewrap{
position:relative;
height:30px
}
#iewrap2{
position:absolute
}
#dropmenu03{
filter:revealTrans(Duration=1.5,Transition=12)
visibility:hide
}
a:hover { color: #FF0000}
body { font-family: "宋体"; font-size: 9pt; text-decoration: none}
a { font-family: "宋体"; font-size: 9pt; text-decoration: none}
-->
</style>
====2、将以下代码加入HTML的<body></body>之间：
<ilayer id="dropmenu01" height=35px>
<layer id="dropmenu02" visibility=show>
<span id="iewrap">
<span id="iewrap2" onClick="dropit2();event.cancelBubble=true;return false">
<font face="宋体"><a href="#">点这里看本站栏目</a></font>
</span>
</span>
</layer>
</ilayer>
<script language="JavaScript1.2">
//如果想关闭 "fade"（消隐）效果，将如下参数设置成false，适用于IE用户。
var enableeffect=true
//将如下数组修改成你自己的。
var selection=new Array()
selection[0]=\'<font face="宋体"><a href="link1.htm">link1</a></font><br>\'
selection[1]=\'<font face="宋体"><a href="link2.htm">link2</a></font><br>\'
selection[2]=\'<font face="宋体"><a href="link3.htm">link3</a></font><br>\'
selection[3]=\'<font face="宋体"><a href="link4.htm">link4</a></font><br>\'
selection[4]=\'<font face="宋体"><a href="link5.htm">link5</a></font>\'
if (document.layers)
document.dropmenu01.document.dropmenu02.visibility=\'show\'
function dropit2(){
if (document.all){
dropmenu03.style.left=document.body.scrollLeft+event.clientX-event.offsetX
dropmenu03.style.top=document.body.scrollTop+event.clientY-event.offsetY+18
if (dropmenu03.style.visibility=="hidden"){
if (enableeffect)
dropmenu03.filters.revealTrans.apply()
dropmenu03.style.visibility="visible"
if (enableeffect)
dropmenu03.filters.revealTrans.play()
}
else{
hidemenu()
}
}
}
function dropit(e){
if (document.dropmenu03.visibility=="hide")
document.dropmenu03.visibility="show"
else
document.dropmenu03.visibility="hide"
document.dropmenu03.left=e.pageX-e.layerX
document.dropmenu03.top=e.pageY-e.layerY+19
return false
}
function hidemenu(){
if (enableeffect)
dropmenu03.filters.revealTrans.stop()
dropmenu03.style.visibility="hidden"
}
function hidemenu2(){
document.dropmenu03.visibility="hide"
}
if (document.layers){
document.dropmenu01.document.dropmenu02.captureEvents(Event.CLICK)
document.dropmenu01.document.dropmenu02.onclick=dropit
}
else if (document.all)
document.body.onclick=hidemenu
</script>
====3、将以下代码加入HEML的<body></body>之间：[第2步的下面位置]
<!-- 你可以改变菜单出现的外观风格-->
<div id="dropmenu03" style="position:absolute;left:0;top:0;layer-background-color:seashell;background-color:seashell;width:100;visibility:hidden;border:1px solid black;padding:0px">
<script language="JavaScript1.2">
if (document.all)
dropmenu03.style.padding=\'4px\'
for (i=0;i<selection.length;i++)
document.write(selection[i])
</script>
</div>
<script language="JavaScript1.2">
if (document.layers){
document.dropmenu03.captureEvents(Event.CLICK)
document.dropmenu03.onclick=hidemenu2
}
</script>
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