/*
  创建实例:
  //参数直接赋值法
  new Marquee("marquee")
  new Marquee("marquee","top")
  ......
  new Marquee("marquee",0,1,760,52)
  new Marquee("marquee","top",1,760,52,50,5000)
  ......
  new Marquee("marquee",0,1,760,104,50,5000,3000,52)
  new Marquee("marquee",null,null,760,104,null,5000,null,-1)

  //参数动态赋值法
  var marquee1 = new Marquee("marquee") *此参数必选
  marquee1.Direction = "top"; 或者 marquee1.Direction = 0;
  marquee1.Step = 1;
  marquee1.Width = 760;
  marquee1.Height = 52;
  marquee1.Timer = 50;
  marquee1.DelayTime = 5000;
  marquee1.WaitTime = 3000;
  marquee1.ScrollStep = 52;
  marquee1.Start();

  参数说明:
  ID  "marquee" 容器ID  (必选)
  Direction (0)  滚动方向 (可选,默认为0向上滚动) 可设置的值包括:0,1,2,3,"top","bottom","left","right" (0向上 1向下 2向左 3向右)
  Step  (1)  滚动的步长 (可选,默认值为2,数值越大,滚动越快)
  Width  (760)  容器可视宽度 (可选,默认值为容器初始设置的宽度)
  Height  (52)  容器可视高度 (可选,默认值为容器初始设置的高度)
  Timer  (50)  定时器  (可选,默认值为30,数值越小,滚动的速度越快,1000=1秒,建议不小于20)
  DelayTime (5000)  间歇停顿延迟时间(可选,默认为0不停顿,1000=1秒)
  WaitTime (3000)  开始时的等待时间(可选,默认或0为不等待,1000=1秒)
  ScrollStep (52)  间歇滚动间距 (可选,默认为翻屏宽/高度,该数值与延迟均为0则为鼠标悬停控制,-1禁止鼠标控制)

　使用建议:
  1、建议直接赋予容器的显示区域的宽度和高度，如(<div id="marquee" style="width:760px;height:52px;">......</div>)
  2、建议为容器添加样式overflow = auto，如(<div id="marquee" style="width:760px;height:52px;overflow:auto;">......</div>)
  3、为了更准确的获取滚动区域的宽度和高度，请尽可能将各滚动单位直接赋予正确宽高度
  4、对于TABLE标记的横向滚动，需要对TABLE添加样式display = inline，如(<div id="marquee" style="width:760px;height:52px;overflow:auto;"><table style="display:inline">......</table></div>)
  5、对于翻屏滚动或间歇滚动，要注意各滚动单位间的间距，同时需要对容器的可视高度和可视宽度做好准确的设置，对于各滚动单位间的间距可以通过设置行间距或者单元格的高宽度来进行调整
  6、对于LI自动换行的问题暂时没有更好的解决办法，建议将其转换成表格(TABLE)的形式来达到同等的效果
  7、针对横向滚动的文字段落，如果最末端是以空格" "结束的，请将空格" "转换成" "
  8、鼠标悬停滚动思想源自Flash，所以有一定的局限性（容器内仅允许用图片<img>或者带链接的图片<a><img></a>的形式，并需要禁止其自动换行）*/

function Marquee() 
{ 
    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(); 
}

Marquee.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' 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' 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); 
}

Marquee.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; 
    } 
} 
//-->