Community Learn Tools Library Leisure
search
English
Home > Web Front-end > JS Tutorial > body text

JavaScript realizes the left and right scrolling effect of pictures [can automatically scroll, has left and right buttons]

高洛峰
Release： 2017-01-18 13:48:06
Original
3059 people have browsed it

The example in this article describes the javascript implementation of the left and right scrolling effect of images. Share it with everyone for your reference, the details are as follows:

html code: 

<!doctype html>
<html>
<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"/>
  <meta name="renderer" content="webkit"/>
  <meta name="keywords" content=""/>
  <meta name="description" content=""/>
  <title>图片滚动</title>
  <style>
  *{margin:0;padding:0;}
  ul{list-style:none;}
  img{border:0;}
  .scroll{width:358px;height:63px;}
  .scroll_left{width:23px;height:63px;background:url(images/btn_left.jpg) no-repeat;float:left;}
  .scroll_right{width:23px;height:63px;background:url(images/btn_right.jpg) left no-repeat;float:left;}
  .pic{width:312px;height:73px;float:left;}
  .pic ul{display:block;}
  .pic li{float:left;display:inline;width:104px;text-align:center;}
  </style>
</head>
<body>
<p style="margin:100px auto;width:358px;">
  <p>
    <p id="LeftArr"></p>
    <p id="scrollPic">
    <ul>
      <li><a href="#" target="_blank" title=""><img src="images/pic01.png" width="100" height="63" alt="" /></a></li>
      <li><a href="#" target="_blank" title=""><img src="images/pic02.jpg" width="100" height="63" alt="" /></a></li>
      <li><a href="#" target="_blank" title=""><img src="images/pic03.jpg" width="100" height="63" alt="" /></a></li>
      <li><a href="#" target="_blank" title=""><img src="images/pic04.jpg" width="100" height="63" alt="" /></a></li>
      <li><a href="#" target="_blank" title=""><img src="images/pic05.jpg" width="100" height="63" alt="" /></a></li>
      <li><a href="#" target="_blank" title=""><img src="images/pic06.jpg" width="100" height="63" alt="" /></a></li>
    </ul>
    </p>
    <p id="RightArr"></p>
  </p>
</p>
</body>
</html>
<script src="scrollPic.js"></script>
<script>
window.onload = function(){
  scrollPic();
}
function scrollPic() {
  var scrollPic = new ScrollPic();
  scrollPic.scrollContId  = "scrollPic"; //内容容器ID
  scrollPic.arrLeftId   = "LeftArr";//左箭头ID
  scrollPic.arrRightId   = "RightArr"; //右箭头ID
  scrollPic.frameWidth   = 312;//显示框宽度
  scrollPic.pageWidth   = 104; //翻页宽度
  scrollPic.speed     = 10; //移动速度(单位毫秒，越小越快)
  scrollPic.space     = 10; //每次移动像素(单位px，越大越快)
  scrollPic.autoPlay    = true; //自动播放
  scrollPic.autoPlayTime  = 3; //自动播放间隔时间(秒)
  scrollPic.initialize(); //初始化
}
</script>
Copy after login

scrollPic.js code: 

var sina = {
  $ : function (objName) {
    if (document.getElementById) {
      return eval(&#39;document.getElementById("&#39; + objName + &#39;")&#39;)
    } else {
      return eval(&#39;document.all.&#39; + objName)
    }
  },
  isIE : navigator.appVersion.indexOf("MSIE") != -1 ? true : false,
  addEvent : function (l, i, I) {
    if (l.attachEvent) {
      l.attachEvent("on" + i, I)
    } else {
      l.addEventListener(i, I, false)
    }
  },
  delEvent : function (l, i, I) {
    if (l.detachEvent) {
      l.detachEvent("on" + i, I)
    } else {
      l.removeEventListener(i, I, false)
    }
  },
  readCookie : function (O) {
    var o = "",
    l = O + "=";
    if (document.cookie.length > 0) {
      var i = document.cookie.indexOf(l);
      if (i != -1) {
        i += l.length;
        var I = document.cookie.indexOf(";", i);
        if (I == -1)
          I = document.cookie.length;
        o = unescape(document.cookie.substring(i, I))
      }
    };
    return o
  },
  writeCookie : function (i, l, o, c) {
    var O = "",
    I = "";
    if (o != null) {
      O = new Date((new Date).getTime() + o * 3600000);
      O = "; expires=" + O.toGMTString()
    };
    if (c != null) {
      I = ";domain=" + c
    };
    document.cookie = i + "=" + escape(l) + O + I
  },
  readStyle : function (I, l) {
    if (I.style[l]) {
      return I.style[l]
    } else if (I.currentStyle) {
      return I.currentStyle[l]
    } else if (document.defaultView && document.defaultView.getComputedStyle) {
      var i = document.defaultView.getComputedStyle(I, null);
      return i.getPropertyValue(l)
    } else {
      return null
    }
  }
};
//滚动图片构造函数
//UI&UE Dept. mengjia
//080623
function ScrollPic(scrollContId, arrLeftId, arrRightId, dotListId) {
  this.scrollContId = scrollContId;
  this.arrLeftId = arrLeftId;
  this.arrRightId = arrRightId;
  this.dotListId = dotListId;
  this.dotClassName = "dotItem";
  this.dotOnClassName = "dotItemOn";
  this.dotObjArr = [];
  this.pageWidth = 0;
  this.frameWidth = 0;
  this.speed = 10;
  this.space = 10;
  this.pageIndex = 0;
  this.autoPlay = true;
  this.autoPlayTime = 5;
  var _autoTimeObj,
  _scrollTimeObj,
  _state = "ready";
  this.stripDiv = document.createElement("DIV");
  this.listDiv01 = document.createElement("DIV");
  this.listDiv02 = document.createElement("DIV");
  if (!ScrollPic.childs) {
    ScrollPic.childs = []
  };
  this.ID = ScrollPic.childs.length;
  ScrollPic.childs.push(this);
  this.initialize = function () {
    if (!this.scrollContId) {
      throw new Error("必须指定scrollContId.");
      return
    };
    this.scrollContDiv = sina.$(this.scrollContId);
    if (!this.scrollContDiv) {
      throw new Error("scrollContId不是正确的对象.(scrollContId = \"" + this.scrollContId + "\")");
      return
    };
    this.scrollContDiv.style.width = this.frameWidth + "px";
    this.scrollContDiv.style.overflow = "hidden";
    this.listDiv01.innerHTML = this.listDiv02.innerHTML = this.scrollContDiv.innerHTML;
    this.scrollContDiv.innerHTML = "";
    this.scrollContDiv.appendChild(this.stripDiv);
    this.stripDiv.appendChild(this.listDiv01);
    this.stripDiv.appendChild(this.listDiv02);
    this.stripDiv.style.overflow = "hidden";
    this.stripDiv.style.zoom = "1";
    this.stripDiv.style.width = "32766px";
    if(-[1,]){
      this.listDiv01.style.cssFloat = "left";
      this.listDiv02.style.cssFloat = "left";
    }else{
      this.listDiv01.style.styleFloat = "left";
      this.listDiv02.style.styleFloat = "left";
    }
    sina.addEvent(this.scrollContDiv, "mouseover", Function("ScrollPic.childs[" + this.ID + "].stop()"));
    sina.addEvent(this.scrollContDiv, "mouseout", Function("ScrollPic.childs[" + this.ID + "].play()"));
    if (this.arrLeftId) {
      this.arrLeftObj = sina.$(this.arrLeftId);
      if (this.arrLeftObj) {
        sina.addEvent(this.arrLeftObj, "mousedown", Function("ScrollPic.childs[" + this.ID + "].rightMouseDown()"));
        sina.addEvent(this.arrLeftObj, "mouseup", Function("ScrollPic.childs[" + this.ID + "].rightEnd()"));
        sina.addEvent(this.arrLeftObj, "mouseout", Function("ScrollPic.childs[" + this.ID + "].rightEnd()"))
      }
    };
    if (this.arrRightId) {
      this.arrRightObj = sina.$(this.arrRightId);
      if (this.arrRightObj) {
        sina.addEvent(this.arrRightObj, "mousedown", Function("ScrollPic.childs[" + this.ID + "].leftMouseDown()"));
        sina.addEvent(this.arrRightObj, "mouseup", Function("ScrollPic.childs[" + this.ID + "].leftEnd()"));
        sina.addEvent(this.arrRightObj, "mouseout", Function("ScrollPic.childs[" + this.ID + "].leftEnd()"))
      }
    };
    if (this.dotListId) {
      this.dotListObj = sina.$(this.dotListId);
      if (this.dotListObj) {
        var pages = Math.round(this.listDiv01.offsetWidth / this.frameWidth + 0.4),
        i,
        tempObj;
        for (i = 0; i < pages; i++) {
          tempObj = document.createElement("span");
          this.dotListObj.appendChild(tempObj);
          this.dotObjArr.push(tempObj);
          if (i == this.pageIndex) {
            tempObj.className = this.dotClassName
          } else {
            tempObj.className = this.dotOnClassName
          };
          tempObj.title = "第" + (i + 1) + "页";
          sina.addEvent(tempObj, "click", Function("ScrollPic.childs[" + this.ID + "].pageTo(" + i + ")"))
        }
      }
    };
    if (this.autoPlay) {
      this.play()
    }
  };
  this.leftMouseDown = function () {
    if (_state != "ready") {
      return
    };
    _state = "floating";
    _scrollTimeObj = setInterval("ScrollPic.childs[" + this.ID + "].moveLeft()", this.speed)
  };
  this.rightMouseDown = function () {
    if (_state != "ready") {
      return
    };
    _state = "floating";
    _scrollTimeObj = setInterval("ScrollPic.childs[" + this.ID + "].moveRight()", this.speed)
  };
  this.moveLeft = function () {
    if (this.scrollContDiv.scrollLeft + this.space >= this.listDiv01.scrollWidth) {
      this.scrollContDiv.scrollLeft = this.scrollContDiv.scrollLeft + this.space - this.listDiv01.scrollWidth
    } else {
      this.scrollContDiv.scrollLeft += this.space
    };
    this.accountPageIndex()
  };
  this.moveRight = function () {
    if (this.scrollContDiv.scrollLeft - this.space <= 0) {
      this.scrollContDiv.scrollLeft = this.listDiv01.scrollWidth + this.scrollContDiv.scrollLeft - this.space
    } else {
      this.scrollContDiv.scrollLeft -= this.space
    };
    this.accountPageIndex()
  };
  this.leftEnd = function () {
    if (_state != "floating") {
      return
    };
    _state = "stoping";
    clearInterval(_scrollTimeObj);
    var fill = this.pageWidth - this.scrollContDiv.scrollLeft % this.pageWidth;
    this.move(fill)
  };
  this.rightEnd = function () {
    if (_state != "floating") {
      return
    };
    _state = "stoping";
    clearInterval(_scrollTimeObj);
    var fill = -this.scrollContDiv.scrollLeft % this.pageWidth;
    this.move(fill)
  };
  this.move = function (num, quick) {
    var thisMove = num / 5;
    if (!quick) {
      if (thisMove > this.space) {
        thisMove = this.space
      };
      if (thisMove < -this.space) {
        thisMove = -this.space
      }
    };
    if (Math.abs(thisMove) < 1 && thisMove != 0) {
      thisMove = thisMove >= 0 ? 1 : -1
    } else {
      thisMove = Math.round(thisMove)
    };
    var temp = this.scrollContDiv.scrollLeft + thisMove;
    if (thisMove > 0) {
      if (this.scrollContDiv.scrollLeft + thisMove >= this.listDiv01.scrollWidth) {
        this.scrollContDiv.scrollLeft = this.scrollContDiv.scrollLeft + thisMove - this.listDiv01.scrollWidth
      } else {
        this.scrollContDiv.scrollLeft += thisMove
      }
    } else {
      if (this.scrollContDiv.scrollLeft - thisMove <= 0) {
        this.scrollContDiv.scrollLeft = this.listDiv01.scrollWidth + this.scrollContDiv.scrollLeft - thisMove
      } else {
        this.scrollContDiv.scrollLeft += thisMove
      }
    };
    num -= thisMove;
    if (Math.abs(num) == 0) {
      _state = "ready";
      if (this.autoPlay) {
        this.play()
      };
      this.accountPageIndex();
      return
    } else {
      this.accountPageIndex();
      setTimeout("ScrollPic.childs[" + this.ID + "].move(" + num + "," + quick + ")", this.speed)
    }
  };
  this.next = function () {
    if (_state != "ready") {
      return
    };
    _state = "stoping";
    this.move(this.pageWidth, true)
  };
  this.play = function () {
    if (!this.autoPlay) {
      return
    };
    clearInterval(_autoTimeObj);
    _autoTimeObj = setInterval("ScrollPic.childs[" + this.ID + "].next()", this.autoPlayTime * 1000)
  };
  this.stop = function () {
    clearInterval(_autoTimeObj)
  };
  this.pageTo = function (num) {
    if (_state != "ready") {
      return
    };
    _state = "stoping";
    var fill = num * this.frameWidth - this.scrollContDiv.scrollLeft;
    this.move(fill, true)
  };
  this.accountPageIndex = function () {
    this.pageIndex = Math.round(this.scrollContDiv.scrollLeft / this.frameWidth);
    if (this.pageIndex > Math.round(this.listDiv01.offsetWidth / this.frameWidth + 0.4) - 1) {
      this.pageIndex = 0
    };
    var i;
    for (i = 0; i < this.dotObjArr.length; i++) {
      if (i == this.pageIndex) {
        this.dotObjArr[i].className = this.dotClassName
      } else {
        this.dotObjArr[i].className = this.dotOnClassName
      }
    }
  }
};
Copy after login

Parameter description:

var scrollPic = new ScrollPic(); //Define variables and initialize methods
scrollContId //Scroll container ID
arrLeftId //Left button ID
arrRightId //Right button ID
frameWidth //Display frame width
pageWidth //Page turning width
speed //Moving speed (unit milliseconds, the smaller the faster)
space //Move pixels each time (unit px, the larger the faster)
autoPlay / /Autoplay
autoPlayTime //Autoplay interval (seconds)
initialize() //Initialization

I hope this article will be helpful to everyone in JavaScript programming.

For more javascript to achieve the left and right scrolling effect of images [can automatically scroll, with left and right buttons] please pay attention to the PHP Chinese website for related articles!


Related labels：
javascript 图片 滚动
source：php.cn
Previous article：Seamless scrolling effect up and down implemented by javascript Next article：Usage and definition of js split js split splits a string into an array example code
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
CSS only method to dynamically modify image src on click without using JavaScript I need to change the src of an image on mouse click using only css like img:active{}
From 2024-04-06 19:25:49
0
1
505
Hide/show div on click and scroll I want to create a hidden search form that appears when we click on the search icon and hi...
From 2024-04-06 12:20:46
0
1
386
Lower opacity of scroll background image, limit minimum opacity I'm trying to get the background image to reduce the opacity on scroll and once away from ...
From 2024-04-04 23:50:53
0
1
1329
Releasing the X-axis after calling Chart.zoom(): a step-by-step guide I set the scroll strategy to setScrollStrategy(AxisScrollStrategies.progressive) and on th...
From 2024-04-04 23:40:56
0
1
1339
How can I make text turn into a new element (like a divider) when clicked? I'm trying to find a way to make certain text on the page turn into separators/new element...
From 2024-04-04 11:21:03
0
1
3580
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template