最近学习JS时,要做一个向左滚动的特效,在网上查了查,都是下面类似的代码,我个人也认为是这样,可是,这段代码为什么运行,总是向左滚动没有多少就停止了呢,请懂的人帮帮忙
<div id="fx_gun_left" style="overflow:hidden;width:500px;">
<table cellpadding="0" cellspacing="0" border="0">
<tr><td id="fx_gun_left1" valign="top" align="center">
<table cellpadding="2" cellspacing="0" border="0">
<tr align="center">
<td><img src="http://jsweb8.cn/images/logo.gif"></td>
<td><img src="http://jsweb8.cn/images/logo.gif"></td>
<td><img src="http://jsweb8.cn/images/logo.gif"></td>
<td><img src="http://jsweb8.cn/images/logo.gif"></td>
<td><img src="http://jsweb8.cn/images/logo.gif"></td><td><img src="http://jsweb8.cn/images/logo.gif" width="88"></td>
<td><img src="http://jsweb8.cn/images/logo.gif"></td>
</tr>
</table>
</td>
<td id="fx_gun_left2" valign="top"></td>
</tr>
</table>
</div>
<script>
var speed=30//速度数值越大速度越慢
fx_gun_left2.innerHTML=fx_gun_left1.innerHTML
function Marquee3(){
if(fx_gun_left2.offsetWidth-fx_gun_left.scrollLeft<=0)
fx_gun_left.scrollLeft-=fx_gun_left1.offsetWidth
else{
fx_gun_left.scrollLeft++
}
}
var MyMar3=setInterval(Marquee3,speed)
fx_gun_left.onmouseover=function() {clearInterval(MyMar3)}
fx_gun_left.onmouseout=function() {MyMar3=setInterval(Marquee3,speed)}
</script>
<div id="fx_gun_left" style="overflow:hidden;width:500px;">
<table cellpadding="0" cellspacing="0" border="0">
<tr><td id="fx_gun_left1" valign="top" align="center">
<table cellpadding="2" cellspacing="0" border="0">
<tr align="center">
<td><img src="http://jsweb8.cn/images/logo.gif"></td>
<td><img src="http://jsweb8.cn/images/logo.gif"></td>
<td><img src="http://jsweb8.cn/images/logo.gif"></td>
<td><img src="http://jsweb8.cn/images/logo.gif"></td>
<td><img src="http://jsweb8.cn/images/logo.gif"></td><td><img src="http://jsweb8.cn/images/logo.gif" width="88"></td>
<td><img src="http://jsweb8.cn/images/logo.gif"></td>
</tr>
</table>
</td>
<td id="fx_gun_left2" valign="top"></td>
</tr>
</table>
</div>
<script>
var speed=30//速度数值越大速度越慢
fx_gun_left2.innerHTML=fx_gun_left1.innerHTML
function Marquee3(){
if(fx_gun_left2.offsetWidth-fx_gun_left.scrollLeft<=0)
fx_gun_left.scrollLeft-=fx_gun_left1.offsetWidth
else{
fx_gun_left.scrollLeft++
}
}
var MyMar3=setInterval(Marquee3,speed)
fx_gun_left.onmouseover=function() {clearInterval(MyMar3)}
fx_gun_left.onmouseout=function() {MyMar3=setInterval(Marquee3,speed)}
</script>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
</HEAD> <BODY>
<div id="fx_gun_left" style="overflow:hidden;width:500px;">
<table cellpadding="0" cellspacing="0" border="0">
<tr><td id="fx_gun_left1" valign="top" align="center">
<table cellpadding="2" cellspacing="0" border="0">
<tr align="center">
<td><img src="http://c.csdn.net/bbs/t/5/i/pic_logo.gif"></td>
<td><img src="http://c.csdn.net/bbs/t/5/i/pic_logo.gif"></td>
<td><img src="http://c.csdn.net/bbs/t/5/i/pic_logo.gif"></td>
<td><img src="http://c.csdn.net/bbs/t/5/i/pic_logo.gif"></td>
<td><img src="http://c.csdn.net/bbs/t/5/i/pic_logo.gif"></td><td><img src="http://c.csdn.net/bbs/t/5/i/pic_logo.gif" width="88"></td>
<td><img src="http://c.csdn.net/bbs/t/5/i/pic_logo.gif"></td>
</tr>
</table>
</td>
<td id="fx_gun_left2" valign="top"></td>
</tr>
</table>
</div>
<script>
var speed=30//速度数值越大速度越慢
fx_gun_left2.innerHTML=fx_gun_left1.innerHTML
function Marquee3(){
if(fx_gun_left2.offsetWidth - fx_gun_left.scrollLeft <= 0)
fx_gun_left.scrollLeft -= fx_gun_left1.offsetWidth
else{
fx_gun_left.scrollLeft++
}
}
var MyMar3=setInterval(Marquee3,speed)
fx_gun_left.onmouseover=function() {clearInterval(MyMar3)}
fx_gun_left.onmouseout=function() {MyMar3=setInterval(Marquee3,speed)}
</script>
</BODY>
</HTML>
这样应该可以了
<div id="fx_gun_left" style="overflow:hidden;width:500px;">
<table cellpadding="0" cellspacing="0" border="0">
<tr><td id="fx_gun_left1" valign="top" align="center">
<table cellpadding="2" cellspacing="0" border="0" style="width:600px">
<tr align="center">
<td><img src="http://jsweb8.cn/images/logo.gif"></td>
<td><img src="http://jsweb8.cn/images/logo.gif"></td>
<td><img src="http://jsweb8.cn/images/logo.gif"></td>
<td><img src="http://jsweb8.cn/images/logo.gif"></td>
<td><img src="http://jsweb8.cn/images/logo.gif"></td><td><img src="http://jsweb8.cn/images/logo.gif" width="88"></td>
<td><img src="http://jsweb8.cn/images/logo.gif"></td>
</tr>
</table>
</td>
<td id="fx_gun_left2" valign="top"></td>
</tr>
</table>
</div>
<script>
var speed=30//速度数值越大速度越慢
fx_gun_left2.innerHTML=fx_gun_left1.innerHTML
function Marquee3(){
if(fx_gun_left2.offsetWidth-fx_gun_left.scrollLeft<=0)
fx_gun_left.scrollLeft-=fx_gun_left1.offsetWidth
else{
fx_gun_left.scrollLeft++
}
}
var MyMar3=setInterval(Marquee3,speed)
fx_gun_left.onmouseover=function() {clearInterval(MyMar3)}
fx_gun_left.onmouseout=function() {MyMar3=setInterval(Marquee3,speed)}
</script>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> 向左滚动 </TITLE>
</HEAD>
<BODY>
<div id="dome" style="overflow:hidden;width:50px;">
<div id="gundong1">
<img src="http://c.csdn.net/bbs/t/5/i/pic_logo.gif">
<img src="http://c.csdn.net/bbs/t/5/i/pic_logo.gif">
</div>
<div id="gundong2"></div>
</div>
<script type="text/javascript">
var speed=50;
var dome=document.getElementById("dome");
var gundong1=document.getElementById("gundong1");
var gundong2=document.getElementById("gundong2");
gundong2.innerHTML=gundong1.innerHTML;
function moveLeft(){
if(gundong2.offsetWidth - dome.scrollLeft <=0){
dome.scrollLeft-=gundong1.offsetWidth;
}
else{
dome.scrollLeft++;
}
}
var myMar=setInterval(moveLeft,speed);
</script>
</BODY>
</HTML>
<tr align="center">
<td><img src="http://jsweb8.cn/images/logo.gif" width="88"></td>
<td><img src="http://jsweb8.cn/images/logo.gif" width="88"></td>
<td><img src="http://jsweb8.cn/images/logo.gif" width="88"></td>
<td><img src="http://jsweb8.cn/images/logo.gif" width="88"></td>
<td><img src="http://jsweb8.cn/images/logo.gif" width="88"></td>
<td><img src="http://jsweb8.cn/images/logo.gif" width="88"></td>
<td><img src="http://jsweb8.cn/images/logo.gif" width="88"></td>
</tr>
</table>