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首页 / 脚本样式 / JavaScript / 基于Marquee.js插件实现的跑马灯效果示例

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
/****************************************************************- 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*****************************************************************/function Marquee(obt) {if (obt == null || obt == "") {return;}this.ID = document.getElementById(obt.ID);if (!this.ID) {alert("初始化错误
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 obt.Direction == "number" && obt.Direction) this.Direction = obt.Direction;if (typeof obt.Direction == "string" && obt.Direction) this.Direction = this.DirectionArray[obt.Direction.toString().toLowerCase()];if (typeof obt.Step == "number" && obt.Step) this.Step = obt.Step;if (typeof obt.Width == "number" && obt.Width) this.Width = obt.Width;if (typeof obt.Height == "number" && obt.Height) this.Height = obt.Height;if (typeof obt.Timer == "number" && obt.Timer) this.Timer = obt.Timer;if (typeof obt.DelayTime == "number" && obt.DelayTime) this.DelayTime = obt.DelayTime;if (typeof obt.WaitTime == "number" && obt.WaitTime) this.WaitTime = obt.WaitTime;if (typeof obt.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 (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;}}
2、脚本调用
window.onload = function() {new Marquee({ ID: "scrollNews", Direction: "top", Step: 2, Width: 0, Height: 80, Timer: 50, DelayTime: 1000, WaitTime: 1000, ScrollStep: 80 });}
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