WebBuild

不间断(全方向)滚动代码，兼容 IE/Firefox [JavaScript]

作者:parno 日期:2007-07-23

字体大小: 小中大

兼容IE和FireFox的间隔滚动代码：

HTML代码

<head>
<title>blog.imwebs.com - 兼容IE和FireFox的间隔滚动代码</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<style type="text/css">

</style>
</head>
<body>
<div id="andyscroll">
 <div id="scrollmessage">
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果1……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果2……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果3……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果4……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果5……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果6……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果7……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果8……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果9……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果10……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果11……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果12……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果13……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果14……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果15……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果16……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果17……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果18……</a>
  <a href="http://blog.imwebs.com">blog.imwebs.com 滚动效果19……</a>
</div>
</div>

</script>
</body>
</html>

[Ctrl+A 全部选择提示：你可先修改部分代码，再按运行]

不间断全方向滚动代码：

HTML代码

<SCRIPT>
var __scrollBarControl = null;
var __divinnerHTML=null;
var __firstTime=true;
function innerBarProp(barID, width, height, interval, direction)
{
 this.barID = barID;
 this.width = width;
 this.height = height;
 this.interval = interval;
 this.direction = direction;
 this.stopScroll = false;
 this.maxValue = 0;
 this.preValue = 0;
}
function scrollBar()
{
 this.barsArray = new Array();
  //save current object
 __scrollBarControl = this;
}
//////////////////////////////////////////////////////////////////
// add scrollbar to bar list and set properties
// parameters:
//     barID: HTML's tag <DIV>'s id property 
//              (for js access the DIV object)
//     width: define the scrollbar's width
//     height: define the scrollbar's height
//     interval: define the scroll speed 
//               ( scroll up/down per XX millinSecond )
//     direction: scroll direction's defined
//               "up"
//               "down"
//               "left"
//               "right"
//////////////////////////////////////////////////////////////////
scrollBar.prototype.addBar = function(barID, width, height, interval, direction)
{
 //check parameters
 var paraCount = arguments.length;
 if ( paraCount < 1 )
 {
  alert("parameters count incorect!");
  return;
  //throw "parameters count inccorect!";
 }
 
 //width's default value
 if ( typeof( width ) == "undefined" )
 {
  var width = 100;
 }
 
 //height's default value
 if ( typeof( height ) == "undefined" )
 {
  var height = 100;
 }
 
 //interval's default value
 if ( typeof( interval ) == "undefined" )
 {
  var interval = 1000;
 }
 
 //direction's default value
 if ( typeof( direction ) == "undefined" )
 {
  var direction = "up";
 }
 
 //create scrollbar's inner properties
 var barProp = new innerBarProp(barID, width, height, interval, direction);
 
 var objBar = document.getElementById(barID);
 if(__divinnerHTML!=null)
 objBar.innerHTML=__divinnerHTML;
else
 __divinnerHTML=objBar.innerHTML;
 var barCount = this.barsArray.length;
 this.barsArray[barCount] = barProp;
}
scrollBar.prototype.clear = function()
{
 for(i=0;i<this.barsArray.length;i++)
  this.barsArray.pop();
 
 
 
 
}
scrollBar.prototype.createScrollBars = function()
{
 //get bar's count
  var barCount = this.barsArray.length;
 //if no bar add to scrollControl do nothing
 if ( barCount == 0 )
 {
  return;
 }
 
 //init scroll bars
 for ( var i=0; i<barCount; i++ )
 {
  var objBarID = this.barsArray[i].barID;
  //if typeof objBarID is object
  // that's meaning it inited
  //if typeof objBarID is string
  // init that scroll bar
  if ( typeof( objBarID ) == "string" )
  {
   //get scroll <DIV> object
   var objBar = document.getElementById( objBarID );
   
   if (objBar == null)
   {
    //objBarID is not exist
    if ( document.readyState == "complete" || document.readyState == "loaded" )
    {
     //the objBarID not exists in current document
     //throw "the objBarID is not exists.";
     alert("ScrollBar[" + objBarID + "]: not exist!");
     return;
    }
    else
    {
     //wait for document to load objBarID
     window.setTimeout("__scrollBarControl.createScrollBars()",50);
     //exit processing..........
     //and wait next time callbak
     return;
    }
   }
   
   //update barID
   this.barsArray[i].barID = objBar;
  }
 }
 
 for ( var i=0; i<barCount; i++ )
 {
  this.innerInitBar(i);
 }
}
scrollBar.prototype.innerInitBar = function (index)
{ 
 //get properties
 var barID = this.barsArray[index].barID;
 var width = this.barsArray[index].width;
 var height = this.barsArray[index].height;
 var interval = this.barsArray[index].interval;
 var direction = this.barsArray[index].direction;
 var maxValue = 0;
 
 //set scrollBar's properties
 with(barID)
 {
  style.width = width;
  style.height = height;
  noWrap=true;
  switch( direction )
  {
   case "up":
    maxValue = Math.max(scrollHeight, height);
    style.overflowX = "visible";
    style.overflowY = "hidden";
    var barHtml = innerHTML;
    var newHtml = "<table border='0' cellspacing='0' cellpadding='0'>\n";
    newHtml += "  <tr height='20'>\n";
    newHtml += "  <td> \n";
    newHtml += "  </td>\n";
    newHtml += "  </tr>\n";
    newHtml += "  <tr>\n";
    newHtml += "    <td height='" + maxValue + "' valign='top'>\n";
    newHtml += barHtml + "\n";
    newHtml += "    </td>\n";
    newHtml += "  </tr>\n";
    newHtml += "  <tr>\n";
    newHtml += "    <td height='" + maxValue + "' valign='top'>\n";
    newHtml += barHtml + "\n";
    newHtml += "    </td>\n";
    newHtml += "  </tr>\n";
    newHtml += "  <tr>\n";
    newHtml += "    <td height='" + maxValue + "' valign='top'>\n";
    newHtml += barHtml + "\n";
    newHtml += "    </td>\n";
    newHtml += "  </tr>\n";
    newHtml += "</table>\n";
 var newHtml = "<table border='0' cellspacing='0' cellpadding='0'>\n";
    newHtml += "  <tr height='20'>\n";
    newHtml += "  <td> \n";
    newHtml += "  </td>\n";
    newHtml += "  </tr>\n";
    newHtml += "  <tr>\n";
    newHtml += "    <td height='" + maxValue + "' valign='top'>\n";
    newHtml += barHtml + "\n";
    newHtml += "    </td>\n";
    newHtml += "  </tr>\n";
    newHtml += "  <tr>\n";
    newHtml += "    <td height='" + maxValue + "' valign='top'>\n";
    newHtml += barHtml + "\n";
    newHtml += "    </td>\n";
    newHtml += "  </tr>\n";
    newHtml += "  <tr>\n";
    newHtml += "    <td height='" + maxValue + "' valign='top'>\n";
    newHtml += barHtml + "\n";
    newHtml += "    </td>\n";
    newHtml += "  </tr>\n";
    newHtml += "</table>\n";
    
    innerHTML = newHtml;
    break;
   case "down":
    maxValue = Math.max(scrollHeight, height);
    style.overflowX = "visible";
    style.overflowY = "hidden";
    var barHtml = innerHTML;
    var newHtml = "<table border='0' cellspacing='0' cellpadding='0'>\n";
    newHtml += "  <tr>\n";
    newHtml += "    <td height='" + maxValue + "' valign='top'>\n";
    newHtml += barHtml + "\n";
    newHtml += "    </td>\n";
    newHtml += "  </tr>\n";
    newHtml += "  <tr>\n";
    newHtml += "    <td height='" + maxValue + "' valign='top'>\n";
    newHtml += barHtml + "\n";
    newHtml += "    </td>\n";
    newHtml += "  </tr>\n";
    newHtml += "</table>\n";
    innerHTML = newHtml;
    scrollTop = maxValue;
    break;
   case "left":
    maxValue = Math.max(scrollWidth, width);
    style.overflowX = "hidden";
    style.overflowY = "visible";
    var barHtml = barID.innerHTML;
    var newHtml = "<table border='0' cellspacing='0' cellpadding='0' width='" + (maxValue * 2 ) + "'>\n";
    newHtml += "  <tr>\n";
    newHtml += "    <td width='" + maxValue + "' valign='top'>\n";
    newHtml += barHtml + "\n";
    newHtml += "    </td>\n";
    newHtml += "    <td width='" + maxValue + "' valign='top'>\n";
    newHtml += barHtml + "\n";
    newHtml += "    </td>\n";
    newHtml += "  </tr>\n";
    newHtml += "</table>\n";
    innerHTML = newHtml;
    break;
   case "right":
    maxValue = Math.max(scrollWidth, width);
    style.overflowX = "hidden";
    style.overflowY = "visible";
    var barHtml = innerHTML;
    var newHtml = "<table border='0' cellspacing='0' cellpadding='0' width='" + (maxValue * 2 ) + "'>\n";
    newHtml += "  <tr>\n";
    newHtml += "    <td width='" + maxValue + "' valign='top'>\n";
    newHtml += barHtml + "\n";
    newHtml += "    </td>\n";
    newHtml += "    <td width='" + maxValue + "' valign='top'>\n";
    newHtml += barHtml + "\n";
    newHtml += "    </td>\n";
    newHtml += "  </tr>\n";
    newHtml += "</table>\n";
    innerHTML = newHtml;
    scrollLeft = maxValue;
    break;
   default:
    //throw "direction is inccorect!";
    alert("ScrollBar[" + id + "]: direction is incorect!");
    return;
  }
  
  //set mouse events
  onmouseover = new Function("__scrollBarControl.mouseEvt(" + index + ",true);");
  onmouseout = new Function("__scrollBarControl.mouseEvt(" + index + ",false);");
  if(__firstTime)
  {

__firstTime=false;
  window.setInterval("__scrollBarControl.scroll(" + index + ");",interval);
  }
  //save maxValue
  this.barsArray[index].maxValue = maxValue;
 }
}
scrollBar.prototype.mouseEvt = function(index, stop)
{
 this.barsArray[index].stopScroll = stop;
}
scrollBar.prototype.scroll = function(index)
{
 //get properties
 var barID = this.barsArray[index].barID;
 var width = this.barsArray[index].width;
 var height = this.barsArray[index].height;
 var interval = this.barsArray[index].interval;
 var direction = this.barsArray[index].direction;
 var stopScroll = this.barsArray[index].stopScroll;
 var preValue = this.barsArray[index].preValue;
 var maxValue = this.barsArray[index].maxValue;
 
 if ( stopScroll == true ) return;
 
 switch(direction)
 {
  case "up":
    preValue++;
    if ( preValue >= maxValue )
    {
     preValue = 0;
    }
    barID.scrollTop = preValue;
    break;
  case "down":
    preValue--;
    if ( preValue <= 0 )
    {
     preValue = maxValue;
    }
    barID.scrollTop = preValue;
    break;
  case "left":
    preValue++;
    if ( preValue >= maxValue )
    {
     preValue = 0;
    }
    barID.scrollLeft = preValue;
    break;
  case "right":
    preValue--;
    if ( preValue <=0 )
    {
     preValue = maxValue;
    }
    barID.scrollLeft = preValue;
    break;
 }
 this.barsArray[index].preValue = preValue;
}
//=================end of file===========================
</SCRIPT>
<SCRIPT>
var scrollBarControl = new scrollBar();
MoveTo("up");
function MoveTo(d)
{
scrollBarControl.clear();
scrollBarControl.addBar("scrollbarDemo", 228, 120, 100, d);
scrollBarControl.createScrollBars();
}
</SCRIPT>

[Ctrl+A 全部选择提示：你可先修改部分代码，再按运行]

HTML代码

<div id="marquees">

<a href="#">链接一</a><br>
<br>
<a href="#">链接二</a><br>
<br>
<a href="#">链接三</a><br>
<br>
<a href="#">链接四</a><br>
<br>
<a href="#">链接一</a><br>
<br>
<a href="#">链接二</a><br>
<br>
<a href="#">链接三</a><br>
<br>
<a href="#">链接四</a><br>
<br>
<a href="#">链接一</a><br>
<br>
<a href="#">链接二</a><br>
<br>
<a href="#">链接三</a><br>
<br>
<a href="#">链接四</a><br>
<br>
<a href="#">链接一</a><br>
<br>
<a href="#">链接二</a><br>
<br>
<a href="#">链接三</a><br>
<br>
<a href="#">链接四</a><br>
<br>

</div> 

<script language="javascript">
<!--
marqueesHeight=100; //内容区高度

stopscroll=false; //这个变量控制是否停止滚动
with(marquees){
noWrap=true; //这句表内容区不自动换行
style.width=0; //于是我们可以将它的宽度设为0，因为它会被撑大
style.height=marqueesHeight;
style.overflowY="hidden"; //滚动条不可见

onmouseover=new Function("stopscroll=true"); //鼠标经过，停止滚动
onmouseout=new Function("stopscroll=false"); //鼠标离开，开始滚动
}
//这时候，内容区的高度是无法读取了。下面输出一个不可见的层"templayer"，稍后将内容复制到里面：
document.write('<div id="templayer" style="position:absolute;z-index:1;visibility:hidden"></div>');

function init(){ //初始化滚动内容
//多次复制原内容到"templayer"，直到"templayer"的高度大于内容区高度：
while(templayer.offsetHeight<marqueesHeight){
templayer.innerHTML+=marquees.innerHTML;
}
//把"templayer"的内容的“两倍”复制回原内容区：
marquees.innerHTML=templayer.innerHTML+templayer.innerHTML;
//设置连续超时，调用"scrollUp()"函数驱动滚动条：
setInterval("scrollUp()",10);
}
document.body.onload=init;

preTop=0; //这个变量用于判断滚动条是否已经到了尽头

function scrollUp(){ //滚动条的驱动函数
if(stopscroll==true) return; //如果变量"stopscroll"为真，则停止滚动 
preTop=marquees.scrollTop; //记录滚动前的滚动条位置
marquees.scrollTop+=1; //滚动条向下移动一个像素
//如果滚动条不动了，则向上滚动到和当前画面一样的位置
//当然不仅如此，同样还要向下滚动一个像素(+1)：
if(preTop==marquees.scrollTop){
marquees.scrollTop=templayer.offsetHeight-marqueesHeight+1;
}
}
-->
</script>

[Ctrl+A 全部选择提示：你可先修改部分代码，再按运行]

[本日志由 parno 于 2009-12-30 10:05 AM 编辑]