符合W3C Web标准的图片连续无间隙水平滚动

时间:2020-05-12 人气:0

这次又遇上一个这样的问题，找了老半天终于从网上找到一个不错的，看了下代码，思路很简单，但代码太多，通用性也不行，于是乎，自己又发明了两个函数，用起来感觉还真不错，与大家共享：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<title>图片连续无间隙向左滚动，无间隙向右滚动，符合W3C Web标准_</title> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
</head> 
<body> 
<div> 
<table cellpadding="0" align="left" border="0" cellspace="0"> 
<tr> 
<td id="demo1" valign="top"><table cellspacing="0" cellpadding="0" width="322" bgcolor="#fffbf7" border="0"> 
<tr align="center"> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25859.jpg" /> </td> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25859.jpg" /> </td> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25859.jpg" /> </td> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25859.jpg" /> </td> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25859.jpg" /> </td> 
</tr> 
</table></td> 
<td id="demo2" valign="top"></td> 
</tr> 
</table> 
</div> 
<div> 
<table cellpadding="0" align="left" border="0" cellspace="0"> 
<tr> 
<td id="demo11" valign="top"><table cellspacing="0" cellpadding="0" width="322" bgcolor="#fffbf7" border="0"> 
<tr align="center"> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25859.jpg" /> </td> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25859.jpg" /> </td> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25859.jpg" /> </td> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25859.jpg" /> </td> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25859.jpg" /> </td> 
</tr> 
</table></td> 
<td id="demo22" valign="top"></td> 
</tr> 
</table> 
</div> 
<script type="text/javascript" language="JavaScript"> 
//调用向左滚动 
toleft("demo","demo1","demo2",30,"hehe123") 
//调用向右滚动 
toright("demo0","demo11","demo22",20,"hehe1123") 
function $(id){return document.getElementById(id)} 
//向左滚动函数，demo包含demo1与demo2,speed是滚动速度，flag一个网页内有多个时设置为不同的任意字符。 
//by 柳永法(yongfa365)'Blog　www.yongfa365.com 
function toleft(demo,demo1,demo2,speed,flag){ 
demo=$(demo);demo1=$(demo1);demo2=$(demo2) 
demo2.innerHTML=demo1.innerHTML 
function Marquee(){ 
if(demo2.offsetWidth-demo.scrollLeft<=0){ 
demo.scrollLeft-=demo1.offsetWidth 
} 
else{ 
demo.scrollLeft++ 
} 
} 
flag=setInterval(Marquee,speed) 
demo.onmouseover=function(){clearInterval(flag);} 
demo.onmouseout=function(){flag=setInterval(Marquee,speed);} 
} 
//向右滚动函数，demo包含demo1与demo2,speed是滚动速度，flag一个网页内有多个时设置为不同的任意字符。 
//by 柳永法(yongfa365)'Blog　www.yongfa365.com 
function toright(demo,demo1,demo2,speed,flag){ 
demo=$(demo);demo1=$(demo1);demo2=$(demo2) 
demo2.innerHTML=demo1.innerHTML 
function Marquee(){ 
if(demo.scrollLeft<=0){ 
demo.scrollLeft=demo2.offsetWidth 
} 
else{ 
demo.scrollLeft-- 
} 
} 
flag=setInterval(Marquee,speed) 
demo.onmouseover=function(){clearInterval(flag);} 
demo.onmouseout=function(){flag=setInterval(Marquee,speed);} 
} 
</script> 
</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

以下为网上提供的代码

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<title>Untitled Document</title> 
</head> 
<body> 
<img onerror="javascript:this.src='/skin1/img/error.jpg';" src="https://img.qb5200.com/download-x/20200511/25860.gif" style="cursor:pointer" onmouseover="clearright();toleft()"/> <img onerror="javascript:this.src='/skin1/img/error.jpg';" src="https://img.qb5200.com/download-x/20200511/25861.gif"style="cursor:pointer" onmouseover="clearleft();toright()"/> 
<div> 
<div> 
<table cellpadding="0" align="left" border="0" cellspace="0"> 
<tbody> 
<tr> 
<td id="demo1" valign="top"><table cellspacing="0" cellpadding="0" width="322" bgcolor="#fffbf7" border="0"> 
<tbody> 
<tr align="center"> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25862.jpg" /> </td> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25863.jpg" /> </td> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25864.jpg" /> </td> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25865.jpg" /> </td> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25866.jpg" /> </td> 
</tr> 
</tbody> 
</table></td> 
<td id="demo2" valign="top"></td> 
</tr> 
</tbody> 
</table> 
</div> 
</div> 
<div> 
<div> 
<table cellpadding="0" align="left" border="0" cellspace="0"> 
<tbody> 
<tr> 
<td id="demo_b" valign="top"><table cellspacing="0" cellpadding="0" width="322" bgcolor="#fffbf7" border="0"> 
<tbody> 
<tr align="center"> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25867.jpg" /> </td> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25868.jpg" /> </td> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25869.jpg" /> </td> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25870.gif" /> </td> 
<td width="50" height="50"><img onerror="javascript:this.src='/skin1/img/error.jpg';" height="50" src="https://img.qb5200.com/download-x/20200511/25862.jpg" /> </td> 
</tr> 
</tbody> 
</table></td> 
<td id="demo_c" valign="top"></td> 
</tr> 
</tbody> 
</table> 
</div> 
</div> 
</body> 
</html> 
<script type="text/javascript"> 
/* 
**兼容IE,Firefox 遵循W3C标准写法的图片无缝滚动代码（支持左移/右移功能）(本示例为上下两行图片进行双行滚动) 
** 
**实现思路：一个设定宽度并且隐藏超出它宽度的内容的容器demo，里面放demo1和demo2，demo1是滚动内容,demo2为demo1的直接克隆， 
**通过不断改变demo1的scrollTop或者scrollLeft达到滚动的目的，当滚动至demo1与demo2的交界处时直接跳回初始位置， 
**因为demo1与demo2一样，所以分不出跳动的瞬间，从而达到"无缝"滚动的目的。 
*/ 
var speed1=0    //图片左移的速度 
var MyMar1    //setInterverval方法返回的间隔ID,些ID为全局的调用次数(用于第一行图片) 
var MyMar2    //setInterverval方法返回的间隔ID,些ID为全局的调用次数(用于第二行图片) 
var lefthit=0        //记录左移按钮点击次数 
var righthit=0    ////记录右移按钮点击次数 
//调用右移方法前,先让左移停止（clearInterval清除setInterval对方法的调用） 
function clearleft(){ 
clearInterval(MyMar1) 
clearInterval(MyMar2) 
} 
//图片左移的方法 
function toleft(){ 
//判断是否是第一次按下左移按钮（图片往左开始移动的时候，不会在调用此方法。只有当按了右移按钮时，才会把lefthit重设为0） 
if(lefthit==0){ 
speed1=30;//图片左移速度时间毫秒 
//让的内容demo2与demo1内容一样 
document.getElementById("demo2").innerHTML=document.getElementById("demo1").innerHTML 
//上行图片移动的方法 
function Marquee1(){ 
//当demo滚动至demo2的交界处。与就是与demo2重合时。offsetWidth与scrollLeft刚好相等 
if(document.getElementById("demo2").offsetWidth-document.getElementById("demo").scrollLeft<=0){ 
/https://img.qb5200.com/download-x/demo跳回初始位置 
document.getElementById("demo").scrollLeft-=document.getElementById("demo1").offsetWidth 
} 
else{ 
/https://img.qb5200.com/download-x/demo开始重新移动 
document.getElementById("demo").scrollLeft++ 
} 
} 
//setInterval让Marquee1方法每隔多少秒执行一次，并把返回的调用次数ID 
MyMar1=setInterval(Marquee1,speed1) 
//当鼠标移动demo上面时。调用clearInterval清除MyMar1.这样图片便不会在移动了。移到图片时，第一行和第二行的图片都会停止 
document.getElementById("demo").onmouseover=function() 
{clearInterval(MyMar1);clearInterval(MyMar2)} 
//当鼠标移除demo时,重新setInterval让方法执行，这样图片会继续移动 
document.getElementById("demo").onmouseout=function() 
{MyMar1=setInterval(Marquee1,speed1);clearInterval(MyMar2);MyMar2=setInterval(Marquee2,speed1)} 
//下面的方法与上面的方法一样，用于第二行的图片向左移动 
document.getElementById("demo_c").innerHTML=document.getElementById("demo_b").innerHTML 
function Marquee2(){ 
if(document.getElementById("demo_c").offsetWidth-document.getElementById("demo_a").scrollLeft<=0){ 
document.getElementById("demo_a").scrollLeft-=document.getElementById("demo_b").offsetWidth} 
else{ 
document.getElementById("demo_a").scrollLeft++ 
} 
} 
MyMar2=setInterval(Marquee2,speed1) 
document.getElementById("demo_a").onmouseover=function() 
{clearInterval(MyMar2);clearInterval(MyMar1)} 
document.getElementById("demo_a").onmouseout=function() 
{MyMar2=setInterval(Marquee2,speed1); document.getElementById("demo").onmouseout()} 
lefthit=1        //设置左移按钮，当按了一次左移后(不管按多少次)，在没按右移按钮之前，toleft方法里的的代码不会再被执行 
righthit=0    //把右移按钮设为0,这样当下次点了右移按钮的时候，以便toright方法被调用 
} 
} 
var MyMar3    //setInterverval方法返回的间隔ID,些ID为全局的调用次数(用于第一行图片) 
var MyMar4    //setInterverval方法返回的间隔ID,些ID为全局的调用次数(用于第二行图片) 
var speed2=0    //图片右移的速度 
//调用移左方法前,先让右移停止（clearInterval清除setInterval对方法的调用） 
function clearright(){ 
clearInterval(MyMar3) 
clearInterval(MyMar4) 
} 
//图片右移方法(与图片左移方法思路一样) 
function toright(){ 
//判断是否是第一次按下右移按钮（图片往右开始移动的时候，不会在调用此方法。只有当按了左移按钮时，才会把righthit重设为0） 
if(righthit==0){ 
speed2=30; 
document.getElementById("demo2").innerHTML=document.getElementById("demo1").innerHTML 
function Marquee_a(){ 
if(document.getElementById("demo").scrollLeft<=0){ 
document.getElementById("demo").scrollLeft=document.getElementById("demo2").offsetWidth 
} 
else{ 
document.getElementById("demo").scrollLeft-- 
} 
} 
MyMar3=setInterval(Marquee_a,speed2) 
document.getElementById("demo").onmouseover=function() 
{clearInterval(MyMar3);document.getElementById("demo_a").onmouseover()} 
document.getElementById("demo").onmouseout=function() 
{MyMar3=setInterval(Marquee_a,speed2);clearInterval(MyMar4);MyMar4=setInterval(Marquee_b,speed2)} 
document.getElementById("demo_c").innerHTML=document.getElementById("demo_b").innerHTML 
function Marquee_b(){ 
if(document.getElementById("demo_a").scrollLeft<=0){ 
document.getElementById("demo_a").scrollLeft=document.getElementById("demo_c").offsetWidth 
} 
else{ 
document.getElementById("demo_a").scrollLeft-- 
} 
} 
MyMar4=setInterval(Marquee_b,speed2) 
document.getElementById("demo_a").onmouseover=function() 
{clearInterval(MyMar4);clearInterval(MyMar3)} 
document.getElementById("demo_a").onmouseout=function() 
{MyMar4=setInterval(Marquee_b,speed2);document.getElementById("demo").onmouseout()} 
righthit=1    //设置右移按钮，当按了一次右移按钮后(不管按多少次)，在没按左移按钮之前，toright方法里的的代码不会再被执行 
lefthit=0    //把左移按钮设为0,这样当下次点了左移按钮的时候，以便toleft方法被调用 
} 
} 
</script>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

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