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基于Marquee.js插件实现的跑马灯效果示例
时间：2017-03-07 编辑：简简单单 来源：一聚教程网
本文实例讲述了基于Marquee.js插件实现的跑马灯效果。分享给大家供大家参考，具体如下：
1、Marquee.js文件
| 代码如下 | 复制代码 |
/**************************************************************** - Marquee.js - 参数： - ID：滚动对象（必须） - Direction：滚动方向（"top": 0, "up": 0, "bottom": 1, "down": 1, "left": 2, "right": 3） - Step：步伐 - Width：宽度 - Height：高度 - Timer：影响步伐滚动速度 - DelayTime：延时时间 - WaitTime：初始化时的等待时间 - ScrollStep：卷页步伐 *****************************************************************/ functionMarquee(obt) { if(obt ==null|| obt =="") { return; } this.ID = document.getElementById(obt.ID); if(!this.ID) { alert("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(typeofobt.Direction =="number"&& obt.Direction)this.Direction = obt.Direction; if(typeofobt.Direction =="string"&& obt.Direction)this.Direction =this.DirectionArray[obt.Direction.toString().toLowerCase()]; if(typeofobt.Step =="number"&& obt.Step)this.Step = obt.Step; if(typeofobt.Width =="number"&& obt.Width)this.Width = obt.Width; if(typeofobt.Height =="number"&& obt.Height)this.Height = obt.Height; if(typeofobt.Timer =="number"&& obt.Timer)this.Timer = obt.Timer; if(typeofobt.DelayTime =="number"&& obt.DelayTime)this.DelayTime = obt.DelayTime; if(typeofobt.WaitTime =="number"&& obt.WaitTime)this.WaitTime = obt.WaitTime; if(typeofobt.ScrollStep =="number"&& obt.ScrollStep)this.ScrollStep = obt.ScrollStep; 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); this.Start(); } Marquee.prototype.Start =function() { if(this.ID == -1)return; if(this.Width == 0)this.Width = parseInt(this.ID.style.width); if(this.Height == 0)this.Height = parseInt(this.ID.style.height); if(this.Timer < 20)this.Timer = 20; if(this.WaitTime < 800)this.WaitTime = 800; 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(typeofthis.ScrollStep !="number")this.ScrollStep =this.Direction > 1 ?this.Width :this.Height; vartemplateLeft =" | |
| MSCLASS_TEMP_HTML | MSCLASS_TEMP_HTML |
";
vartemplateTop ="
| MSCLASS_TEMP_HTML |
| MSCLASS_TEMP_HTML |
";
varmsobj =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);
}
}
vartimer =this.Timer;
vardelaytime =this.DelayTime;
varwaittime =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. 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) {
varevent = 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) {
case0:
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;
case1:
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;
case2:
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;
case3:
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;
}
}
2、脚本调用
| 代码如下 | 复制代码 |
window.onload =function() { newMarquee({ ID:"scrollNews", Direction:"top", Step: 2, Width: 0, Height: 80, Timer: 50, DelayTime: 1000, WaitTime: 1000, ScrollStep: 80 }); } | |
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