js 文字水平滚动效果

文字水平滚动：

<style type="text/css"> 
#gongao{width:240px;height:30px;overflow:hidden;line-height:30px;font-size:13px;background:#DDE5ED;color:#0C77CF;font-weight:bold;} 
#gongao #scroll_begin, #gongao #scroll_end{display:inline} 
</style> 
<script type="text/javascript"> 
function ScrollImgLeft(){ 
var speed=50; 
var scroll_begin = document.getElementById("scroll_begin"); 
var scroll_end = document.getElementById("scroll_end"); 
var scroll_div = document.getElementById("scroll_div"); 
scroll_end.innerHTML=scroll_begin.innerHTML; 
function Marquee(){ 
if(scroll_end.offsetWidth-scroll_div.scrollLeft<=0) 
scroll_div.scrollLeft-=scroll_begin.offsetWidth; 
else 
scroll_div.scrollLeft++; 
} 
var MyMar=setInterval(Marquee,speed); 
scroll_div.onmouseover=function() {clearInterval(MyMar);} 
scroll_div.onmouseout=function() {MyMar=setInterval(Marquee,speed);} 
} 
</script> 
<div id="gongao"> 
<div style="width:240px;height:30px;margin:0 auto;white-space: nowrap;overflow:hidden;" id="scroll_div" class="scroll_div"> 
<div id="scroll_begin"> 
阿斯顿发撒旦发送的方法发生的发撒旦法时代发生的发生的发生的发生地方
</div> 
<div id="scroll_end"></div> 
</div> 
<script type="text/javascript">ScrollImgLeft();</script> 
</div>