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全兼容的滚动js脚本

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最近公司项目里面经常要一个滚动列表，设计师又搞不出来，只好我来搞～搞烦了就想找个简单的方法，解决这个问题，于是从网上找了个简单兼容的滚动代码，把它改成了，设计师可以理解的形式来。这样设计师从此自己添加滚动代码啦，舒服～～

以下是代码片段：
/************************************************************
* 滚动效果
* 注意：所有参数都必须填
* @param {string} id 要绑定的滚动层ID
* @param direction {string/number} direction 滚动方向 top/up/0：向上；bottom/down/1：向下；left/2：向左；right/3：向右
* @param {number} Step 滚动速度，默认为1,值越大越慢
* @param {number} width 滚动层宽度，如果设置为0则取ID参数指定层的宽度
* @param {number} height 滚动层高度，如果设置为0则取ID参数指定层的高度
* @param {number} timer 滚动速度，每隔多长时间移动1像素，默认为30毫秒，如果小于20则为20
* @param {number} delaytime 每次滚动之间间隔的毫秒数，一般为3000
* @param {number} waittime 第一次滚动前等待的秒数，单位毫秒，默认800，如果小于800，则为默认值
* @param {number} scrollstep 每次滚动的像素数
*
* @example
*
<div>
<ul id="olist">
<li><b>[博世]</b>成都市国晖贸易有限公司</li>
<li><b>[明光牌]</b>成都明光波纹管有限公司</li>
<li><b>[成塑]</b>成都三电股份有限公司（四川电缆厂）</li>
<li><b>[五星]</b>泊头市五星高温油泵厂驻成都办事处</li>
<li><b>[友声]</b>成都市声达衡器经营部</li>
<li><b>[三峡]</b>成都市金牛区东远建材化工经营部</li>
<li><b>[雷诺]</b>顺发电动工具商行</li>
<li><b>[博世]</b>成都市国晖贸易有限公司</li>
<li><b>[明光牌]</b>成都明光波纹管有限公司</li>
<li><b>[成塑]</b>成都三电股份有限公司（四川电缆厂）</li>
<li><b>[五星]</b>泊头市五星高温油泵厂驻成都办事处</li>
<li><b>[友声]</b>成都市声达衡器经营部</li>
<li><b>[三峡]</b>成都市金牛区东远建材化工经营部</li>
<li><b>[雷诺]</b>顺发电动工具商行</li>
</ul>
<script defer>
new EAMarquee("olist",0,10,331,160,30,3000,5000,200);
</script>
<div>
*****************************************************************************************/
function EAMarquee()
{
this.ID = document.getElementById(arguments[0]);
if(!this.ID)
{
  //alert("您要设置的\"" + arguments[0] + "\"初始化错误\r\n请检查标签ID设置是否正确!");
  this.ID = -1;
  return;
}
this.Direction = this.Width = this.Height = this.DelayTime = this.WaitTime = this.CTL = this.StartID = this.Stop = this.MouseOver = 0;
this.Step = 1;
this.Timer = 30;
this.DirectionArray = {"top":0 , "up":0 , "bottom":1 , "down":1 , "left":2 , "right":3};
if(typeof arguments[1] == "number" || typeof arguments[1] == "string")this.Direction = arguments[1];
if(typeof arguments[2] == "number")this.Step = arguments[2];
if(typeof arguments[3] == "number")this.Width = arguments[3];
if(typeof arguments[4] == "number")this.Height = arguments[4];
if(typeof arguments[5] == "number")this.Timer = arguments[5];
if(typeof arguments[6] == "number")this.DelayTime = arguments[6];
if(typeof arguments[7] == "number")this.WaitTime = arguments[7];
if(typeof arguments[8] == "number")this.ScrollStep = arguments[8];
this.ID.style.overflow = this.ID.style.overflowX = this.ID.style.overflowY = "hidden";
this.ID.noWrap = true;
this.IsNotOpera = (navigator.userAgent.toLowerCase().indexOf("opera") == -1);
if(arguments.length >= 7)this.Start();
}
EAMarquee.prototype.Start = function()
{
if(this.ID == -1)return;
if(this.WaitTime < 800)this.WaitTime = 800;
if(this.Timer < 20)this.Timer = 20;
if(this.Width == 0)this.Width = parseInt(this.ID.style.width);
if(this.Height == 0)this.Height = parseInt(this.ID.style.height);
if(typeof this.Direction == "string")this.Direction = this.DirectionArray[this.Direction.toString().toLowerCase()];
this.HalfWidth = Math.round(this.Width / 2);
this.HalfHeight = Math.round(this.Height / 2);
this.BakStep = this.Step;
this.ID.style.width = this.Width + "px";
this.ID.style.height = this.Height + "px";
if(typeof this.ScrollStep != "number")this.ScrollStep = this.Direction > 1 ? this.Width : this.Height;
var templateLeft = "<table cellspacing=’0’ cellpadding=’0’ border=’0’ style=’border-collapse:collapse;display:inline;’><tr><td noWrap=true style=’white-space: nowrap;word-break:keep-all;’>MSCLASS_TEMP_HTML</td><td noWrap=true style=’white-space: nowrap;word-break:keep-all;’>MSCLASS_TEMP_HTML</td></tr></table>";
var templateTop = "<table cellspacing=’0’ cellpadding=’0’ boder=’0’ style=’border-collapse:collapse;’><tr><td>MSCLASS_TEMP_HTML</td></tr><tr><td>MSCLASS_TEMP_HTML</td></tr></table>";
var msobj = this;
msobj.tempHTML = msobj.ID.innerHTML;
if(msobj.Direction <= 1)
{
  msobj.ID.innerHTML = templateTop.replace(/MSCLASS_TEMP_HTML/g,msobj.ID.innerHTML);
}
else
{
  if(msobj.ScrollStep == 0 && msobj.DelayTime == 0)
  {
   msobj.ID.innerHTML += msobj.ID.innerHTML;
  }
  else
  {
   msobj.ID.innerHTML = templateLeft.replace(/MSCLASS_TEMP_HTML/g,msobj.ID.innerHTML);
  }
}
var timer = this.Timer;
var delaytime = this.DelayTime;
var waittime = this.WaitTime;
msobj.StartID = function(){msobj.Scroll()}
msobj.Continue = function()
    {
     if(msobj.MouseOver == 1)
     {
      setTimeout(msobj.Continue,delaytime);
     }
     else
     { clearInterval(msobj.TimerID);
      msobj.CTL = msobj.Stop = 0;
      msobj.TimerID = setInterval(msobj.StartID,timer);
     }
    }
msobj.Pause = function()
   {
    msobj.Stop = 1;
    clearInterval(msobj.TimerID);
    setTimeout(msobj.Continue,delaytime);
   }
msobj.Begin = function()
  {
   msobj.ClientScroll = msobj.Direction > 1 ? msobj.ID.scrollWidth / 2 : msobj.ID.scrollHeight / 2;
   if((msobj.Direction <= 1 && msobj.ClientScroll <= msobj.Height + msobj.Step) || (msobj.Direction > 1 && msobj.ClientScroll <= msobj.Width + msobj.Step))   {
    msobj.ID.innerHTML = msobj.tempHTML;
    delete(msobj.tempHTML);
    return;
   }
   delete(msobj.tempHTML);
   msobj.TimerID = setInterval(msobj.StartID,timer);
   if(msobj.ScrollStep < 0)return;
   msobj.ID.onmousemove = function(event)
      {
       if(msobj.ScrollStep == 0 && msobj.Direction > 1)
       {
        var event = event || window.event;
        if(window.event)
        {
         if(msobj.IsNotOpera)
         {
          msobj.EventLeft = event.srcElement.id == msobj.ID.id ? event.offsetX - msobj.ID.scrollLeft : event.srcElement.offsetLeft - msobj.ID.scrollLeft + event.offsetX;
         }
         else
         {
          msobj.ScrollStep = null;
          return;
         }
        }
        else
        {
         msobj.EventLeft = event.layerX - msobj.ID.scrollLeft;
        }
        msobj.Direction = msobj.EventLeft > msobj.HalfWidth ? 3 : 2;
        msobj.AbsCenter = Math.abs(msobj.HalfWidth - msobj.EventLeft);
        msobj.Step = Math.round(msobj.AbsCenter * (msobj.BakStep*2) / msobj.HalfWidth);
       }
      }
   msobj.ID.onmouseover = function()
      {
       if(msobj.ScrollStep == 0)return;
       msobj.MouseOver = 1;
       clearInterval(msobj.TimerID);
      }
   msobj.ID.onmouseout = function()
      {
       if(msobj.ScrollStep == 0)
       {
        if(msobj.Step == 0)msobj.Step = 1;
        return;
       }
       msobj.MouseOver = 0;
       if(msobj.Stop == 0)
       {
        clearInterval(msobj.TimerID);
        msobj.TimerID = setInterval(msobj.StartID,timer);
       }
      }
  }
setTimeout(msobj.Begin,waittime);
}
EAMarquee.prototype.Scroll = function()
{
switch(this.Direction)
{
  case 0:
   this.CTL += this.Step;
   if(this.CTL >= this.ScrollStep && this.DelayTime > 0)
   {
    this.ID.scrollTop += this.ScrollStep + this.Step - this.CTL;
    this.Pause();
    return;
   }
   else
   {
    if(this.ID.scrollTop >= this.ClientScroll)
    {
     this.ID.scrollTop -= this.ClientScroll;
    }
    this.ID.scrollTop += this.Step;
   }
  break;
  case 1:
   this.CTL += this.Step;
   if(this.CTL >= this.ScrollStep && this.DelayTime > 0)
   {
    this.ID.scrollTop -= this.ScrollStep + this.Step - this.CTL;
    this.Pause();
    return;
   }
   else
   {
    if(this.ID.scrollTop <= 0)
    {
     this.ID.scrollTop += this.ClientScroll;
    }
    this.ID.scrollTop -= this.Step;
   }
  break;
  case 2:
   this.CTL += this.Step;
   if(this.CTL >= this.ScrollStep && this.DelayTime > 0)
   {
    this.ID.scrollLeft += this.ScrollStep + this.Step - this.CTL;
    this.Pause();
    return;
   }
   else
   {
    if(this.ID.scrollLeft >= this.ClientScroll)
    {
     this.ID.scrollLeft -= this.ClientScroll;
    }
    this.ID.scrollLeft += this.Step;
   }
  break;
  case 3:
   this.CTL += this.Step;
   if(this.CTL >= this.ScrollStep && this.DelayTime > 0)
   {
    this.ID.scrollLeft -= this.ScrollStep + this.Step - this.CTL;
    this.Pause();
    return;
   }
   else
   {
    if(this.ID.scrollLeft <= 0)
    {
     this.ID.scrollLeft += this.ClientScroll;
    }
    this.ID.scrollLeft -= this.Step;
   }
  break;
}
}

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文章信息

作者：暗夜木偶来源： SourceJoy PHP Javascript web前端用户体验 - 注于web应用开发
标签：滚动
发布时间：2010-05-23 21:42:02

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