js 上下文字滚动效果_文字特效

js实现的文字向上滚动效果，适合文字公告等。

<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>test</title> <style type="text/css"> #textHeight{line-height:25px; height:25px; overflow:hidden; width:150px; font-size:12px; border:solid 1px #666;} </style> <script language="javascript" type="text/javascript"> function ScrollText(content){ this.Delay=10; this.Amount=1; this.Direction="up"; this.Timeout=1000; this.ScrollContent=this.gid(content); this.ScrollContent.innerHTML += this.ScrollContent.innerHTML; this.ScrollContent.onmouseover = this.GetFunction(this,"Stop"); this.ScrollContent.onmouseout = this.GetFunction(this,"Start"); } ScrollText.prototype.gid=function(element){ return document.getElementById(element); } ScrollText.prototype.Stop=function(){ clearTimeout(this.AutoScrollTimer); clearTimeout(this.ScrollTimer); } ScrollText.prototype.Start=function(){ clearTimeout(this.AutoScrollTimer); this.AutoScrollTimer=setTimeout(this.GetFunction(this,"AutoScroll"),this.Timeout); } ScrollText.prototype.AutoScroll=function(){ if(this.Direction=="up"){ if(parseInt(this.ScrollContent.scrollTop)>=parseInt(this.ScrollContent.scrollHeight)/2){ this.ScrollContent.scrollTop=0; clearTimeout(this.AutoScrollTimer); this.AutoScrollTimer = setTimeout(this.GetFunction(this,"AutoScroll"), this.Timeout); return; } this.ScrollContent.scrollTop += this.Amount; }else { if(parseInt(this.ScrollContent.scrollTop) <= 0) { this.ScrollContent.scrollTop = parseInt(this.ScrollContent.scrollHeight) / 2; } this.ScrollContent.scrollTop -= this.Amount; } if(parseInt(this.ScrollContent.scrollTop) % this.LineHeight != 0) { this.ScrollTimer = setTimeout(this.GetFunction(this,"AutoScroll"), this.Delay); } else { this.AutoScrollTimer = setTimeout(this.GetFunction(this,"AutoScroll"), this.Timeout); } } ScrollText.prototype.GetFunction=function(variable,method){ return function() { variable[method](); } } </script> <div id="textHeight" title="xx"> <a href="#"></a> </div>