JS代碼實現(xiàn)煙花效果的下拉菜單效果

2012/11/2 16:08:50作者：佚名來源：網(wǎng)絡(luò)

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【實例名稱】

【實例描述】

在實際網(wǎng)站建設(shè)中，經(jīng)常需要使用CSS+JavaScript的形式實現(xiàn)一特殊的效果，本例中的“煙花”菜單就是利用CSS的一些特性。

【實例代碼】

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>標(biāo)題頁-學(xué)無憂（wangbatian.cn）</title>
<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: "宋體"; font-size: 9pt; text-decoration: none}
a { font-family: "宋體"; font-size: 9pt; text-decoration: none}
</style>
</head>
<body>
<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="宋體"><a href="#">單擊此處出現(xiàn)菜單</a></font>
</span>
</span>
</layer>
</ilayer>
<script language="JavaScript">
//關(guān)閉 "fade"（消隱）效果，將如下參數(shù)設(shè)置成false。
var enableeffect=true;
//菜單項
var selection=new Array();
selection[0]='<font face="宋體"><a href="#">第一個菜單</a></font><br>';
selection[1]='<font face="宋體"><a href="#">第二個菜單</a></font><br>';
selection[2]='<font face="宋體"><a href="#">第三個菜單</a></font><br>';
selection[3]='<font face="宋體"><a href="#">第四個菜單</a></font><br>';
selection[4]='<font face="宋體"><a href="#">第五個菜單</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();  
//配置特殊效果
dropmenu03.style.visibility="visible";
if (enableeffect)
dropmenu03.filters.revealTrans.play();
//演示特殊效果
}
else{
hidemenu();                           
//隱藏菜單
}}}
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;
}
//隱藏菜單的方法
function hidemenu()
{
if (enableeffect)
dropmenu03.filters.revealTrans.stop();  
//停止特效
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>
<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="JavaScript">
if (document.layers){
document.dropmenu03.captureEvents(Event.CLICK);
document.dropmenu03.onclick=hidemenu2;
}
</script>
</body>
</html>

【運行效果】

煙花效果的下拉菜單運行效果