上下自动滚动新闻效果-JS特效-爱易网页

上下自动滚动新闻效果

日期：2014-05-18　浏览次数：20219 次

以下是程序代码

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> 
 
<HTML><HEAD><TITLE>上下自动滚动新闻效果－爱易网 aiyiweb.com</TITLE> 
<META content="text/html; charset=gb2312" http-equiv=Content-Type> 
<STYLE type=text/css>#divUpControl { 
    LEFT: 10px; POSITION: absolute; TEXT-ALIGN: right; TOP: 10px; WIDTH: 294px; Z-INDEX: 1 
} 
#divDownControl { 
    LEFT: 10px; POSITION: absolute; TEXT-ALIGN: right; TOP: 240px; WIDTH: 294px; Z-INDEX: 1 
} 
#divContainer { 
    CLIP: rect(0px 294px 210px 0px); HEIGHT: 210px; LEFT: 10px; OVERFLOW: hidden; POSITION: absolute; TOP: 30px; VISIBILITY: hidden; WIDTH: 294px 
} 
#divContent { 
    LEFT: 0px; POSITION: absolute; TOP: 0px 
} 
DIV { 
    COLOR: #ffffcc; FONT-SIZE: 9pt; LINE-HEIGHT: 150% 
} 
A:link { 
    COLOR: #ffffcc; TEXT-DECORATION: none 
} 
A:visited { 
    COLOR: #ffffcc; TEXT-DECORATION: none 
} 
A:active { 
    COLOR: #ffffcc; TEXT-DECORATION: none 
} 
A:hover { 
    COLOR: #00ffff 
} 
</STYLE>

<SCRIPT language=JavaScript>// begin absolutely positioned scrollable area object scripts  
// Extension developed by David G. Miles  
// Original Scrollable Area code developed by Thomas Brattli  
function verifyCompatibleBrowser(){  
    this.ver=navigator.appVersion  
    this.dom=document.getElementById?1:0  
    this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0;  
    this.ie4=(document.all && !this.dom)?1:0;  
    this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0;  
  
    this.ns4=(document.layers && !this.dom)?1:0;  
    this.bw=(this.ie5 || this.ie4 || this.ns4 || this.ns5)  
    return this  
}  
bw=new verifyCompatibleBrowser()  
  
  
var speed=50  
  
var loop, timer  
  
function ConstructObject(obj,nest){  
    nest=(!nest) ? '':'document.'+nest+'.'  
    this.el=bw.dom?document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+'document.'+obj):0;  
    this.css=bw.dom?document.getElementById(obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+'document.'+obj):0;  
    this.scrollHeight=bw.ns4?this.css.document.height:this.el.offsetHeight  
    this.clipHeight=bw.ns4?this.css.clip.height:this.el.offsetHeight  
    this.up=MoveAreaUp;this.down=MoveAreaDown;  
    this.MoveArea=MoveArea; this.x; this.y;  
    this.obj = obj + "Object"  
    eval(this.obj + "=this")  
    return this  
}  
function MoveArea(x,y){  
    this.x=x;this.y=y  
    this.css.left=this.x  
    this.css.top=this.y  
}  
  
function MoveAreaDown(move){  
    if(this.y>-this.scrollHeight+objContainer.clipHeight){  
    this.MoveArea(0,this.y-move)  
    if(loop) setTimeout(this.obj+".down("+move+")",speed)  
    }  
}  
function MoveAreaUp(move){  
    if(this.y<0){  
    this.MoveArea(0,this.y-move)  
    if(loop) setTimeout(this.obj+".up("+move+")",speed)  
    }  
}  
  
function PerformScroll(speed){  
    if(initialised){  
        loop=true;  
        if(speed>0) objScroller.down(speed)  
        else objScroller.up(speed)  
    }  
}  
  
function CeaseScroll(){  
    loop=false  
    if(timer) clearTimeout(timer)  
}  
var initialised;  
function InitialiseScrollableArea(){  
    objContainer=new ConstructObject('divContainer')  
    objScroller=new ConstructObject('divContent','divContainer')  
    objScroller.MoveArea(0,0)  
    objContainer.css.visibility='visible'  
    initialised=true;  
}  
// end absolutely positioned scrollable area object scripts

</SCRIPT>

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