js melaksanakan karusel imej kiri dan kanan dengan mengklik pada kemahiran it_javascript

Ini bersamaan dengan rangka kerja kecil, anda boleh menggunakannya dengan segera:

1. Fungsi:

Seperti yang ditunjukkan dalam gambar di atas: Klik dua butang di sebelah kiri dan kanan untuk menatal imej ke kiri dan kanan, atau tetapkan bilangan saat untuk menatal sendiri.

2. Mula-mula buat fail js bernama play.js (asalkan ia sama dengan pengenalan dalam HTML):

var sina = {
  $: function(objName) {
    if (document.getElementById) {
      return eval('document.getElementById("' + objName + '")')
    } else {
      return eval('document.all.' + 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.rentStyle) {
      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
    }
  }
};

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";
    this.listDiv01.style.cssFloat = "left";
    this.listDiv02.style.cssFloat = "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
      }
    }
  }
};

3. Cipta fail HTML:

<!DOCTYPE html>
<html>

  <head>
    <meta charset="utf-8">
    <title>实现滚动轮播的效果</title>
    <style type="text/css">
      .nav {
        width: 1100px;
        height: 160px;
        /*border: 1px solid red;*/
        margin-left: 140px;
        position: relative;
        cursor: pointer;
        margin-top: 15px;
        overflow: hidden;
        border: 1px solid red
      }
      .nav #nav-all {
        width: auto;
        height: 160px;
        position: absolute;
        left: -30px;
      }
      .nav .nav-i {
        width: 194px;
        height: 158px;
        background: #fff;
        border: 1px solid #d8d8d8;
        float: left;
        margin-left: 30px;
      }
      .nav .nav-img {
        text-align: center;
        padding-top: 50px;
      }
      .nav .nav-name {
        width: 192px;
        height: 30px;
        background: #f2f2f2;
        margin-top: 33px;
        line-height: 30px;
      }
      .nav .nav-name a {
        font-size: 16px;
        font-family: '微软雅黑';
        padding-left: 10px;
        cursor: pointer;
      }
      .nav .nav-name a:hover {
        color: #4a7abe;
      }
      #last {
        position: absolute;
        left: 0;
        top: 50px;
      }
      #next {
        position: absolute;
        right: 0;
        top: 50px;
      }
      .last-next {
        /*display: none;*/
        
        cursor: pointer;
      }
    </style>
  </head>

  <body>
    <div class="nav" id="nav">
      <div id="nav-all">
        <div class="nav-i">
          <div class="nav-img">
            <img src="img/icon1.png" />
          </div>
          <div class="nav-name"><a>BI系统1</a>
          </div>
        </div>
        <div class="nav-i">
          <div class="nav-img">
            <img src="img/icon1.png" />
          </div>
          <div class="nav-name"><a>BI系统2</a>
          </div>
        </div>
        <div class="nav-i">
          <div class="nav-img">
            <img src="img/icon1.png" />
          </div>
          <div class="nav-name"><a>BI系统3</a>
          </div>
        </div>
        <div class="nav-i">
          <div class="nav-img">
            <img src="img/icon1.png" />
          </div>
          <div class="nav-name"><a>BI系统4</a>
          </div>
        </div>
        <div class="nav-i">
          <div class="nav-img">
            <img src="img/icon1.png" />
          </div>
          <div class="nav-name"><a>BI系统5</a>
          </div>
        </div>
        <div class="nav-i">
          <div class="nav-img">
            <img src="img/icon1.png" />
          </div>
          <div class="nav-name"><a>BI系统6</a>
          </div>
        </div>
        <div class="nav-i">
          <div class="nav-img">
            <img src="img/icon1.png" />
          </div>
          <div class="nav-name"><a>BI系统7</a>
          </div>
        </div>
      </div>
      <a class="last-next" id="last">
        <img src="img/last.png" />
      </a>
      <a class="last-next" id="next">
        <img src="img/next.png" />
      </a>
    </div>
    <script src="play.js" type="text/javascript" charset="utf-8"></script>

    <script type="text/javascript">
      var scrollPic_02 = new ScrollPic();
      scrollPic_02.scrollContId = "nav-all";//存放所有轮播元素的div
      scrollPic_02.arrLeftId = "last"; //左箭头ID
      scrollPic_02.arrRightId = "next"; //右箭头ID
      scrollPic_02.frameWidth = 1102; //显示框宽    sfdasdfakfl;jlkajka;d度
      scrollPic_02.pageWidth = 226; //翻页宽度
      scrollPic_02.speed = 10; //移动速度(毫秒，越小越快)
      scrollPic_02.space = 20; //每次移动像素(单位px，越大越快)
      scrollPic_02.autoPlay = true; //自动播放:true|false
      scrollPic_02.autoPlayTime = 2; //自动播放间隔时间(秒)
      scrollPic_02.initialize(); //初始化
       //--><!]]>
    </script>
  </body>

</html>

Antaranya: nyahpepijat gaya sendiri, perkara yang paling penting ialah skrip di bahagian bawah, tetapkan ini untuk mencapai kesan.

Jika anda ingin menulis karusel lain kali, anda hanya perlu menukar gaya dan menukar beberapa data dalam skrip.

Di atas adalah keseluruhan kandungan artikel ini, saya harap anda semua menyukainya.