新闻标题淡掉后出现下面的新闻标题？
我知道javascript能实现很多的特效，但今天这个特效我实现不了请大家帮个忙！
是这样：有3条（数量不定）新闻，要求的效果是： 开始时显示第1条新闻，3秒后(或者5秒后)
第1条新闻慢慢淡掉，接着出现第2条新闻，3秒后，第2条新闻也慢慢淡掉，接着出现第3条新闻
...就是这样的效果
不知道大家有没有见过这样的效果呢？？？
<html><head>
<style type="text/css">
/*Example CSS for the two demo tickers*/
#domticker{
width: 200px;
height: 100px;
border: 1px dashed black;
padding: 5px;
background-color: #FFFFCA;
}
#domticker div{ /*IE6 bug fix when text is bold and fade effect (alpha filter) is enabled. Style inner DIV with same color as outer DIV*/
background-color: #FFFFCA;
}
#domticker a{
font-weight: bold;
}
#domticker2{
width: 350px;
height: 1.2em;
border: 1px solid black;
padding: 3px;
}
#domticker2 a{
text-decoration: none;
}
.someclass{ //class to apply to your scroller(s) if desired
}
</style>
<script type="text/javascript">
/*Example message arrays for the two demo scrollers*/
var tickercontent=new Array()
tickercontent[0]='<b>浣溪沙</b><br />蔌蔌衣巾落枣花，村南村北响缫车。牛衣古柳卖黄瓜。酒困路长惟欲睡，日高人渴漫思茶。敲门试问野人家。'
tickercontent[1]='<b>昭君怨</b><br />谁作桓伊三弄，惊破绿窗幽梦。新月与愁烟，满江天。欲去又还不去，明日落花飞絮。飞絮送行舟，水东流。'
tickercontent[2]='<b>减字木兰花 春月</b><br />春庭月午，摇荡香醪光欲舞。步转回廊，半落梅花婉娩香。轻云薄雾，总是少年行乐处。不似秋光，只与离人照断肠。'
var tickercontent2=new Array()
tickercontent2[0]='<a href="guyer.net.cn'">http://www.guyer.net.cn">guyer.net.cn</a>'
tickercontent2[1]='<a href="http://www.sina.com">新浪: 新闻资询平台</a>'
tickercontent2[2]='<a href="http://www.163.com">网易: 商业门户网站</a>'
</script>
<script type="text/javascript">
function domticker(content, divId, divClass, delay, fadeornot){
this.content=content
this.tickerid=divId //ID of master ticker div. Message is contained inside first child of ticker div
this.delay=delay //Delay between msg change, in miliseconds.
this.mouseoverBol=0 //Boolean to indicate whether mouse is currently over ticker (and pause it if it is)
this.pointer=1
this.opacitystring=(typeof fadeornot!="undefined")? "width: 100%; filter:progid:DXImageTransform.Microsoft.alpha(opacity=100); -moz-opacity: 1" : ""
if (this.opacitystring!="") this.delay+=500 //add 1/2 sec to account for fade effect, if enabled
this.opacitysetting=0.2 //Opacity value when reset. Internal use.
document.write('<div id="'+divId+'" class="'+divClass+'"><div style="'+this.opacitystring+'">'+content[0]+'</div></div>')
var instanceOfTicker=this
setTimeout(function(){instanceOfTicker.initialize()}, delay)
}
domticker.prototype.initialize=function(){
var instanceOfTicker=this
this.contentdiv=document.getElementById(this.tickerid).firstChild //div of inner content that holds the messages
document.getElementById(this.tickerid).onmouseover=function(){instanceOfTicker.mouseoverBol=1}
document.getElementById(this.tickerid).onmouseout=function(){instanceOfTicker.mouseoverBol=0}
this.rotatemsg()
}
domticker.prototype.rotatemsg=function(){
var instanceOfTicker=this
if (this.mouseoverBol==1) //if mouse is currently over ticker, do nothing (pause it)
setTimeout(function(){instanceOfTicker.rotatemsg()}, 100)
else{
this.fadetransition("reset") //FADE EFFECT- RESET OPACITY
this.contentdiv.innerHTML=this.content[this.pointer]
this.fadetimer1=setInterval(function(){instanceOfTicker.fadetransition('up', 'fadetimer1')}, 100) //FADE EFFECT- PLAY IT
this.pointer=(this.pointer<this.content.length-1)? this.pointer+1 : 0
setTimeout(function(){instanceOfTicker.rotatemsg()}, this.delay) //update container
}
}
// -------------------------------------------------------------------
// fadetransition()- cross browser fade method for IE5.5+ and Mozilla/Firefox
// -------------------------------------------------------------------
domticker.prototype.fadetransition=function(fadetype, timerid){
var contentdiv=this.contentdiv
if (fadetype=="reset")
this.opacitysetting=0.2
if (contentdiv.filters && contentdiv.filters[0]){
if (typeof contentdiv.filters[0].opacity=="number") //IE6+
contentdiv.filters[0].opacity=this.opacitysetting*100
else //IE 5.5
contentdiv.style.filter="alpha(opacity="+this.opacitysetting*100+")"
}
else if (typeof contentdiv.style.MozOpacity!="undefined" && this.opacitystring!=""){
contentdiv.style.MozOpacity=this.opacitysetting
}
else
this.opacitysetting=1
if (fadetype=="up")
this.opacitysetting+=0.2
if (fadetype=="up" && this.opacitysetting>=1)
clearInterval(this[timerid])
}
</script></head>
<body><script type="text/javascript">
//new domticker(name_of_message_array, CSS_ID, CSS_classname, pause_in_miliseconds, optionalfadeswitch)
new domticker(tickercontent, "domticker", "someclass", 3000, "fadeit")
document.write("<br />")
new domticker(tickercontent2, "domticker2", "someclass", 3000)
</script>
</body></html>
