js implementiert das linke und rechte Bildkarussell durch Klicken auf it_javascript skills

Dies entspricht einem kleinen Framework, Sie können es sofort verwenden:

1. Funktion:

Wie im Bild oben gezeigt: Klicken Sie auf die beiden Schaltflächen links und rechts, um das Bild nach links und rechts zu scrollen, oder legen Sie die Anzahl der Sekunden zum Scrollen selbst fest.

2. Erstellen Sie zunächst eine js-Datei mit dem Namen play.js (sofern sie mit der Einleitung in HTML übereinstimmt):

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 &#63; 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. Erstellen Sie eine HTML-Datei:

<!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>

Unter anderem: Debuggen Sie den Stil selbst. Das Wichtigste ist das Skript unten. Legen Sie diese fest, um den Effekt zu erzielen.

Wenn Sie das nächste Mal ein Karussell schreiben möchten, müssen Sie nur den Stil ändern und einige Daten im Skript ändern.

Das Obige ist der gesamte Inhalt dieses Artikels. Ich hoffe, er gefällt Ihnen allen.