由标题很容易看出来，这是一个可以在显示每一个消息时都会暂停的动态滚动条，滚动条的样式完全由CSS控制，当然也包括显示尺寸。调整尺寸后就可以很容易的制作出一个单行的滚动公告板。
代码：
将以下代码放在网页的<head></head>之间。
<style type="text/css">
/*Example CSS for the two demo scrollers*/
#pscroller1{
width: 200px;
height: 100px;
border: 1px solid black;
padding: 5px;
background-color: lightyellow;
}
#pscroller2{
width: 450px;
height: 22px;
border: 1px solid black;
padding: 3px;
}
#pscroller2 a{
text-decoration: none;
}
.someclass{ //class to apply to your scroller(s) if desired
}
BODY, td, div {
FONT-SIZE: 12px; FONT-FAMILY: Verdana, Arial, Helvetica, sans-serif
}
A {
COLOR: #003499; TEXT-DECORATION: none; FONT-SIZE: 12px;
}
A:hover {
COLOR: #000000; TEXT-DECORATION: underline; FONT-SIZE: 12px;
}
</style>
<script type="text/javascript">
/*Example message arrays for the two demo scrollers*/
var pausecontent=new Array()
pausecontent[0]='<a href="http://YITU.org">艺图</a><br />欣赏高质量的国外艺术大师作品图片。欣赏经典名作，体味艺术人生。'
pausecontent[1]='<a href="http://www.codebit.cn">CodeBit.cn</a><br />收录经典小段代码，翻译转载国外优秀技术文章。'
var pausecontent2=new Array()
pausecontent2[0]='<a href="http://YITU.org">【艺图】 欣赏高质量的国外艺术大师作品图片。欣赏经典名作，体味艺术人生。</a>'
pausecontent2[1]='<a href="http://www.codebit.cn">【CodeBit.cn】 收录经典小段代码，翻译转载国外优秀技术文章。</a> '
</script>
<script type="text/javascript">
/***********************************************
* Pausing up-down scroller- ? Dynamic Drive (www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit http://www.dynamicdrive.com/ for this script and 100s more.
***********************************************/
function pausescroller(content, divId, divClass, delay){
this.content=content //message array content
this.tickerid=divId //ID of ticker div to display information
this.delay=delay //Delay between msg change, in miliseconds.
this.mouseoverBol=0 //Boolean to indicate whether mouse is currently over scroller (and pause it if it is)
this.hiddendivpointer=1 //index of message array for hidden div
document.write('<div id="'+divId+'" class="'+divClass+'" style="position: relative; overflow: hidden"><div class="innerDiv" style
="position: absolute; width: 100%" id="'+divId+'1">'+content[0]+'</div><div class="innerDiv" style="position: absolute; width: 100%;
visibility: hidden" id="'+divId+'2">'+content[1]+'</div></div>')
var scrollerinstance=this
if (window.addEventListener) //run onload in DOM2 browsers
window.addEventListener("load", function(){scrollerinstance.initialize()}, false)
else if (window.attachEvent) //run onload in IE5.5+
window.attachEvent("onload", function(){scrollerinstance.initialize()})
else if (document.getElementById) //if legacy DOM browsers, just start scroller after 0.5 sec
setTimeout(function(){scrollerinstance.initialize()}, 500)
}
// -------------------------------------------------------------------
// initialize()- Initialize scroller method.
// -Get div objects, set initial positions, start up down animation
// -------------------------------------------------------------------
pausescroller.prototype.initialize=function(){
this.tickerdiv=document.getElementById(this.tickerid)
this.visiblediv=document.getElementById(this.tickerid+"1")
this.hiddendiv=this.hiddendiv=document.getElementById(this.tickerid+"2")
this.visibledivtop=parseInt(pausescroller.getCSSpadding(this.tickerdiv))
//set width of inner DIVs to outer DIV's width minus padding (padding assumed to be top padding x 2)
this.visiblediv.style.width=this.hiddendiv.style.width=this.tickerdiv.offsetWidth-(this.visibledivtop*2)+"px"
this.getinline(this.visiblediv, this.hiddendiv)
this.hiddendiv.style.visibility="visible"
var scrollerinstance=this
this.tickerdiv.onmouseover=function(){scrollerinstance.mouseoverBol=1}
this.tickerdiv.onmouseout=function(){scrollerinstance.mouseoverBol=0}
setTimeout(function(){scrollerinstance.animateup()}, this.delay)
}
// -------------------------------------------------------------------
// animateup()- Move the two inner divs of the scroller up and in sync
// -------------------------------------------------------------------
pausescroller.prototype.animateup=function(){
var scrollerinstance=this
if (parseInt(this.hiddendiv.style.top)>(this.visibledivtop+5)){
this.visiblediv.style.top=parseInt(this.visiblediv.style.top)-5+"px"
this.hiddendiv.style.top=parseInt(this.hiddendiv.style.top)-5+"px"
setTimeout(function(){scrollerinstance.animateup()}, 50)
}else{
this.getinline(this.hiddendiv, this.visiblediv)
this.swapdivs()
setTimeout(function(){scrollerinstance.setmessage()}, this.delay)
}
}
// -------------------------------------------------------------------
// swapdivs()- Swap between which is the visible and which is the hidden div
// -------------------------------------------------------------------
pausescroller.prototype.swapdivs=function(){
var tempcontainer=this.visiblediv
this.visiblediv=this.hiddendiv
this.hiddendiv=tempcontainer
}
pausescroller.prototype.getinline=function(div1, div2){
div1.style.top=this.visibledivtop+"px"
div2.style.top=Math.max(div1.parentNode.offsetHeight, div1.offsetHeight)+"px"
}
// -------------------------------------------------------------------
// setmessage()- Populate the hidden div with the next message before it's visible
// -------------------------------------------------------------------
pausescroller.prototype.setmessage=function(){
var scrollerinstance=this
if (this.mouseoverBol==1) //if mouse is currently over scoller, do nothing (pause it)
setTimeout(function(){scrollerinstance.setmessage()}, 100)
else{
var i=this.hiddendivpointer
var ceiling=this.content.length
this.hiddendivpointer=(i+1>ceiling-1)? 0 : i+1
this.hiddendiv.innerHTML=this.content[this.hiddendivpointer]
this.animateup()
}
}
pausescroller.getCSSpadding=function(tickerobj){ //get CSS padding value, if any
if (tickerobj.currentStyle)
return tickerobj.currentStyle["paddingTop"]
else if (window.getComputedStyle) //if DOM2
return window.getComputedStyle(tickerobj, "").getPropertyValue("padding-top")
else
return 0
}
</script>
然后将下面的代码插入到网页的<body></body>之间，可以放在你想显示的任意位置。
<script type="text/javascript">
//new pausescroller(name_of_message_array, CSS_ID, CSS_classname, pause_in_miliseconds)
new pausescroller(pausecontent, "pscroller1", "someclass", 3000)
document.write("<br />")
new pausescroller(pausecontent2, "pscroller2", "someclass", 2000)
</script>
调用说明：
new pausescroller(pausecontent, "pscroller1", "someclass", 3000)
其中 pausecontent 是你在<head></head>之间的代码定义的显示内容。pscroller1 是你在CSS中定义的唯一的滚动层ID， someclass 是任意您想附加的显示样式， 3000 是控制暂停的时间，以毫秒为单位。
控制显示样式的方法就是用标准的CSS语法：
#pscroller1{
width: 200px;
height: 100px;
border: 1px solid black;
padding: 5px;
background-color: lightyellow;
}
如果想创建单行的滚动条可以简单的将 height 值改为 20px 或是 25px 即可。
可暂停的滚动公告板，就这样完成了。
这个强大，纯js的东西，收下~~