JavaScript 无缝上下左右滚动加定高定宽停顿效果

根据无缝滚动和八向滚动修改而来，特点是能同一程序中分别向四个方向移动。
对滚动框内的样式设置有些要求。

效果：

var $$ = function (id) {
return "string" == typeof id ? document.getElementById(id) : id;
};
var Class = {
create: function() {
return function() {
this.initialize.apply(this, arguments);
}
}
}
Object.extend = function(destination, source) {
for (var property in source) {
destination[property] = source[property];
}
return destination;
}
function addEventHandler(oTarget, sEventType, fnHandler) {
if (oTarget.addEventListener) {
oTarget.addEventListener(sEventType, fnHandler, false);
} else if (oTarget.attachEvent) {
oTarget.attachEvent("on" + sEventType, fnHandler);
} else {
oTarget["on" + sEventType] = fnHandler;
}
};

var Scroller = Class.create();
Scroller.prototype = {
initialize: function(idScroller, idScrollMid, options) {
var oThis = this, oScroller = $$(idScroller), oScrollMid = $$(idScrollMid);

this.SetOptions(options);
this.Side = this.options.Side || ["up"];//方向
this.scroller = oScroller; //对象
this.speed = this.options.Speed; //速度
this.timer = null; //时间
this.pauseHeight = 0; //定高
this.pauseWidth = 0; //定宽
this.pause = 0; //定高(宽)
this.side = 0; //参数

//用于上下滚动
this.heightScroller = parseInt(oScroller.style.height) || oScroller.offsetHeight;
this.heightList = oScrollMid.offsetHeight;

//用于左右滚动
this.widthScroller = parseInt(oScroller.style.width) || oScroller.offsetWidth;
this.widthList = oScrollMid.offsetWidth;

//js取不到css设置的height和width

oScroller.style.overflow = "hidden";
oScrollMid.appendChild(oScrollMid.cloneNode(true));
oScrollMid.appendChild(oScrollMid.cloneNode(true));

addEventHandler(oScroller, "mouseover", function() { oThis.Stop(); });
addEventHandler(oScroller, "mouseout", function() { oThis.Start(); });

this.Start();
},
//设置默认属性
SetOptions: function(options) {
this.options = {//默认值
Step: 1,//每次变化的px量
Speed: 20,//速度(越大越慢)
Side: ["up"],//滚动方向:"up"是上，"down"是下，"left"是左，"right"是右
PauseHeight: 0,//隔多高停一次
PauseWidth: 0,//隔多宽停一次
//当上下和左右一起使用时必须设置PauseHeight和PauseWidth来设置转向位置
PauseStep: 1000//停顿时间(PauseHeight或PauseWidth大于0该参数才有效)
};
Object.extend(this.options, options || {});
},
//转向
Turn: function() {
//通过设置方向数组的排列来转向
this.Side.push(this.Side.shift().toLowerCase());
},
//上下滚动
ScrollUpDown: function() {
this.pause = this.pauseHeight;
this.scroller.scrollTop = this.GetScroll(this.scroller.scrollTop, this.heightScroller, this.heightList, this.options.PauseHeight);
this.pauseHeight = this.pause;

var oThis = this;
this.timer = window.setTimeout(function(){ oThis.Start(); }, this.speed);
},
//左右滚动
ScrollLeftRight: function() {
this.pause = this.pauseWidth;
//注意:scrollLeft超过1400会自动变回1400 注意长度
this.scroller.scrollLeft = this.GetScroll(this.scroller.scrollLeft, this.widthScroller, this.widthList, this.options.PauseWidth);
this.pauseWidth = this.pause;

var oThis = this;
this.timer = window.setTimeout(function(){ oThis.Start(); }, this.speed);
},
//获取设置滚动数据
GetScroll: function(iScroll, iScroller, iList, iPause) {
var iStep = this.options.Step * this.side;

if(this.side > 0){
if(iScroll >= (iList * 2 - iScroller)){ iScroll -= iList; }
} else {
if(iScroll <= 0){ iScroll += iList; }
}

this.speed = this.options.Speed;
if(iPause > 0){
if(Math.abs(this.pause) >= iPause){
this.speed = this.options.PauseStep; this.pause = iStep = 0; this.Turn();
} else {
this.pause += iStep;
}
}

return (iScroll + iStep);
},
//开始
Start: function() {

//document.getElementById("test").innerHTML+=sTurn+",";

//方向设置
switch (this.Side[0].toLowerCase()) {
case "right" :
if(this.widthList < this.widthScroller) return;
this.side = -1;
this.ScrollLeftRight();
break;
case "left" :
if(this.widthList < this.widthScroller) return;
this.side = 1;
this.ScrollLeftRight();
break;
case "down" :
if(this.heightList < this.heightScroller) return;
this.side = -1;
this.ScrollUpDown();
break;
case "up" :
default :
if(this.heightList < this.heightScroller) return;
this.side = 1;
this.ScrollUpDown();
}
},
//停止
Stop: function() {
clearTimeout(this.timer);
}
};

.Scroller {line-height:50px; border:1px solid #000000; padding:0px 10px; height:50px; width:400px;}
.Scroller *{margin:0px; padding:0px;}
.ScrollMid {float:left;}
.ScrollMid ul{width:800px;float:left;}
.ScrollMid li{list-style:none; float:left; width:390px; padding-left:10px;line-height:50px; }

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new Scroller("idScroller", "idScrollMid",{ Side:["up","left"], PauseHeight:50, PauseWidth:400 });

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>


<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />


<title>JavaScript 无缝上下左右滚动加定高定宽停顿效果(兼容ie/ff)</title>


</head>


<body>




<script type="text/javascript">





var $ = function (id)

{


return "string" == typeof id ? document.getElementById(id) : id;


};






var Class =

{




create: function()

{




return function()

{


this.initialize.apply(this, arguments);


}


}


}






Object.extend = function(destination, source)

{




for (var property in source)

{


destination[property] = source[property];


}


return destination;


}






function addEventHandler(oTarget, sEventType, fnHandler)

{




if (oTarget.addEventListener)

{


oTarget.addEventListener(sEventType, fnHandler, false);




} else if (oTarget.attachEvent)

{


oTarget.attachEvent("on" + sEventType, fnHandler);




} else

{


oTarget["on" + sEventType] = fnHandler;


}


};






var Scroller = Class.create();




Scroller.prototype =

{




initialize: function(idScroller, idScrollMid, options)

{


var oThis = this, oScroller = $(idScroller), oScrollMid = $(idScrollMid);





this.SetOptions(options);


this.Side = this.options.Side || ["up"];//方向


this.scroller = oScroller; //对象


this.speed = this.options.Speed; //速度


this.timer = null; //时间


this.pauseHeight = 0; //定高


this.pauseWidth = 0; //定宽


this.pause = 0; //定高(宽)


this.side = 0; //参数





//用于上下滚动


this.heightScroller = parseInt(oScroller.style.height) || oScroller.offsetHeight;


this.heightList = oScrollMid.offsetHeight;





//用于左右滚动


this.widthScroller = parseInt(oScroller.style.width) || oScroller.offsetWidth;


this.widthList = oScrollMid.offsetWidth;





//js取不到css设置的height和width





oScroller.style.overflow = "hidden";


oScrollMid.appendChild(oScrollMid.cloneNode(true));


oScrollMid.appendChild(oScrollMid.cloneNode(true));







addEventHandler(oScroller, "mouseover", function()

{ oThis.Stop(); });




addEventHandler(oScroller, "mouseout", function()

{ oThis.Start(); });





this.Start();


},


//设置默认属性




SetOptions: function(options)

{




this.options =

{//默认值


Step: 1,//每次变化的px量


Speed: 20,//速度(越大越慢)


Side: ["up"],//滚动方向:"up"是上，"down"是下，"left"是左，"right"是右


PauseHeight: 0,//隔多高停一次


PauseWidth: 0,//隔多宽停一次


//当上下和左右一起使用时必须设置PauseHeight和PauseWidth来设置转向位置


PauseStep: 1000//停顿时间(PauseHeight或PauseWidth大于0该参数才有效)


};




Object.extend(this.options, options ||

{});


},


//转向




Turn: function()

{


//通过设置方向数组的排列来转向


this.Side.push(this.Side.shift().toLowerCase());


},


//上下滚动




ScrollUpDown: function()

{


this.pause = this.pauseHeight;


this.scroller.scrollTop = this.GetScroll(this.scroller.scrollTop, this.heightScroller, this.heightList, this.options.PauseHeight);


this.pauseHeight = this.pause;





var oThis = this;




this.timer = window.setTimeout(function()

{ oThis.Start(); }, this.speed);


},


//左右滚动




ScrollLeftRight: function()

{


this.pause = this.pauseWidth;


//注意:scrollLeft超过1400会自动变回1400 注意长度


this.scroller.scrollLeft = this.GetScroll(this.scroller.scrollLeft, this.widthScroller, this.widthList, this.options.PauseWidth);


this.pauseWidth = this.pause;





var oThis = this;




this.timer = window.setTimeout(function()

{ oThis.Start(); }, this.speed);


},


//获取设置滚动数据




GetScroll: function(iScroll, iScroller, iList, iPause)

{


var iStep = this.options.Step * this.side;







if(this.side > 0)

{




if(iScroll >= (iList * 2 - iScroller))

{ iScroll -= iList; }




} else

{




if(iScroll <= 0)

{ iScroll += iList; }


}





this.speed = this.options.Speed;




if(iPause > 0)

{




if(Math.abs(this.pause) >= iPause)

{


this.speed = this.options.PauseStep; this.pause = iStep = 0; this.Turn();




} else

{


this.pause += iStep;


}


}





return (iScroll + iStep);


},


//开始




Start: function()

{


//方向设置




switch (this.Side[0].toLowerCase())

{


case "right" :


if(this.widthList < this.widthScroller) return;


this.side = -1;


this.ScrollLeftRight();


break;


case "left" :


if(this.widthList < this.widthScroller) return;


this.side = 1;


this.ScrollLeftRight();


break;


case "down" :


if(this.heightList < this.heightScroller) return;


this.side = -1;


this.ScrollUpDown();


break;


case "up" :


default :


if(this.heightList < this.heightScroller) return;


this.side = 1;


this.ScrollUpDown();


}


},


//停止




Stop: function()

{


clearTimeout(this.timer);


}


};






window.onload = function()

{




new Scroller("idScroller", "idScrollMid",

{ Side:["up","left"], PauseHeight:50, PauseWidth:400 });


}


</script>




<style>





.Scroller {

}{line-height:50px; border:1px solid #000000; padding:0px 10px; height:50px; width:400px;}




.Scroller *{

}{margin:0px; padding:0px;}




.ScrollMid {

}{float:left;}




.ScrollMid ul{

}{width:800px;float:left;}




.ScrollMid li{

}{list-style:none; float:left; width:390px; padding-left:10px;}


</style>


<div id="idScroller" class="Scroller" style="width:400px; height:50px;">


<div style="width:1600px">


<div id="idScrollMid" class="ScrollMid">


<ul>


<li>111111111111</li>


<li>2222222222222</li>


<li>333333333333333</li>


<li>4444444444444</li>


</ul>


</div>


</div>


</div>


<div id="test"></div>


</body>


</html>