函数封装问题

<html>
<head>
<title>左右滚动的图片效果 - 51windows.Net</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body bgcolor="#999999"><table border="1" width="760" align="center">
  <tr>
    <td width="215"> </td>
    <td width="545">
<!-- 滚动代码 begin -->
<div id="demo" style="overflow:hidden;height:120px;width:543px;">
<table width="100%" cellspacing="0">
<tr>
<td id="demo1">
<table cellspacing="0" cellspacing="2">
<tr>
<td><a href="http://www.51windows.net/mypic/sight/page_01.htm" target="_blank"><img src="http://www.51windows.net/51wfolder_1/jsimg/TN_Feng016.JPG" border="0"/></a></td>
<td><a href="http://www.51windows.net/mypic/sight/page_01.htm" target="_blank"><img src="http://www.51windows.net/51wfolder_1/jsimg/TN_Feng017.JPG" border="0"/></a></td>
<td><a href="http://www.51windows.net/mypic/sight/page_01.htm" target="_blank"><img src="http://www.51windows.net/51wfolder_1/jsimg/TN_Feng018.JPG" border="0"/></a></td>
<td><a href="http://www.51windows.net/mypic/sight/page_01.htm" target="_blank"><img src="http://www.51windows.net/51wfolder_1/jsimg/TN_Feng019.JPG" border="0"/></a></td>
<td><a href="http://www.51windows.net/mypic/sight/page_01.htm" target="_blank"><img src="http://www.51windows.net/51wfolder_1/jsimg/TN_Feng020.JPG" border="0"/></a></td>
<td><a href="http://www.51windows.net/mypic/sight/page_01.htm" target="_blank"><img src="http://www.51windows.net/51wfolder_1/jsimg/TN_Feng021.JPG" border="0"/></a></td>
</tr>
</table>
</td>
<td id="demo2"></td>
</tr>
</table>
</div>
<!-- 滚动代码 end -->
</td>
  </tr>
</table>
<script type="text/javascript">
var speed=50
demo2.innerHTML=demo1.innerHTML
function Marquee(direct,MainId,contentId,copyId){
  var objMain = document.getElementById(MainId);
    var objContent = document.getElementById(contentId);
    var objCopy = document.getElementById(copyId);
    var mainWidth = objMain.offsetWidth
    var contentWidth = objContent.offsetWidth
    var copyWidth = objCopy.offsetWidth;
    var mainHeight = objMain.offsetHeight;
    var contentHeight = objContent.offsetHeight;
    var copyHeight = objCopy.offsetHeight;
    if (direct=="LEFT"){
        if (copyWidth-objMain.scrollLeft<=0){
            objMain.scrollLeft-=contentWidth;
        }else{
            objMain.scrollLeft+=2;
        }
    }else if (direct=="RIGHT"){
        if (copyWidth-mainWidth-objMain.scrollLeft>=0){
            objMain.scrollLeft=contentWidth + copyWidth - mainWidth;
        }else{
            objMain.scrollLeft-=2;
        }
    }else if (direct=="UP"){
        if (copyHeight-objMain.scrollTop<=0){
            objMain.scrollTop-=contentHeight;
        }else{
            objMain.scrollTop+=2;
        }
    }else if (direct=="DOWN"){
        if (copyHeight-mainHeight-objMain.scrollTop>=0){
            objMain.scrollTop=contentHeight + copyHeight - mainHeight;
        }else{
            objMain.scrollTop-=2;
        }      
    }
}
var v1Scroll = setInterval(new Function("Marquee(direct,divid,td1,td2)"),speed);
v1demo.onmouseover=function() {clearInterval(v1Scroll)}
v1demo.onmouseout=function() {v1Scroll=setInterval(new Function("Marquee(direct,divid,td1,td2)"),speed)}
</script>
</body>
</html>
对这段代码的脚本 我想把它封装起来 然后外面用一个函数就能够调用<script></script>里面的内容 该怎么做呢？

解决方案 »

  1.   

    把这三句写在一个函数里，在页面调下，其他都写在引用的JS文件中，还有程序现在报错的direct这些都没定义
    var speed=50
    demo2.innerHTML=demo1.innerHTML
    var v1Scroll = setInterval(new Function("Marquee(direct,divid,td1,td2)"),speed);
      

  2.   

    刚才的源码弄错了 应该是这样的<script type="text/javascript">var speed=50
    demo2.innerHTML=demo1.innerHTML
    function Marquee(direct,MainId,contentId,copyId){
    var objMain = document.getElementById(MainId);
    var objContent = document.getElementById(contentId);
    var objCopy = document.getElementById(copyId);
    var mainWidth = objMain.offsetWidth
    var contentWidth = objContent.offsetWidth
    var copyWidth = objCopy.offsetWidth;
    var mainHeight = objMain.offsetHeight;
    var contentHeight = objContent.offsetHeight;
    var copyHeight = objCopy.offsetHeight;
    if (direct=="LEFT"){
    if (copyWidth-objMain.scrollLeft<=0){
    objMain.scrollLeft-=contentWidth;
    }else{
    objMain.scrollLeft+=2;
    }
    }else if (direct=="RIGHT"){
    if (copyWidth-mainWidth-objMain.scrollLeft>=0){
    objMain.scrollLeft=contentWidth + copyWidth - mainWidth;
    }else{
    objMain.scrollLeft-=2;
    }
    }else if (direct=="UP"){
    if (copyHeight-objMain.scrollTop<=0){
    objMain.scrollTop-=contentHeight;
    }else{
    objMain.scrollTop+=2;
    }
    }else if (direct=="DOWN"){
    if (copyHeight-mainHeight-objMain.scrollTop>=0){
    objMain.scrollTop=contentHeight + copyHeight - mainHeight;
    }else{
    objMain.scrollTop-=2;
    }
    }
    }var v1Scroll = setInterval(new Function("Marquee('LEFT','demo','demo1','demo2')"),speed);
    v1demo.onmouseover=function() {clearInterval(v1Scroll)}
    v1demo.onmouseout=function() {v1Scroll=setInterval(new Function("Marquee('LEFT','demo','demo1','demo2')"),speed)}</script>
    hbhbhbhbhb1021(天外水火(我要多努力)) 我想问下var v1Scroll = setInterval(new Function("Marquee('LEFT','demo','demo1','demo2')"),speed);里面的new Function为什么要这样写呢？为什么不这样参数就传递不进去呢？还有就是我上面说的意思是我想把脚本里的代码都封装起来，然后页面下通过调用一个函数，能够表现出和没有封装前一样的效果~~~
      

  3.   

    要动态设置这里的参数需要写成
    JS中函数也是一个对象，差不多象构造函数的参数一样
    new Function("Marquee('"+LEFT+"','"+demo+"','"+demo1+"','"+demo2+"')")