Javascript melaksanakan kemahiran paparan iklan tayangan slaid Taobao effect

Javascript melaksanakan kemahiran paparan iklan tayangan slaid Taobao effect_javascript

WBOY

Lepaskan： 2016-05-16 16:02:06

asal

1197 orang telah melayarinya

Contoh dalam artikel ini menerangkan kaedah menggunakan JavaScript untuk mencapai kesan paparan iklan tayangan slaid Taobao. Kongsikan dengan semua orang untuk rujukan anda. Butirannya adalah seperti berikut:

1. Penyampaian adalah seperti berikut:

2. Bahagian kod:

Bahagian kod JS:

function getClass(oParent,name){ 
  var arr=[]; 
  var oBj=oParent.getElementsByTagName("*"); 
  for(var i=0;i<oBj.length;i++){ 
    if(oBj[i].className==name){ 
      arr.push(oBj[i]); 
    } 
  } 
  return arr; 
} 
function startmove(obj,json,fnEnd){ 
  var cur=0; 
  clearInterval(obj.timer); 
  obj.timer=setInterval(function(){ 
    var oStop=true; 
    for(var attr in json){ 
      if(attr=='opacity'){ 
        cur=Math.round(parseFloat(getStyle(obj,attr)*100)); 
      }else{ 
        cur=parseInt(getStyle(obj,attr)); 
      } 
      var speed=(json[attr]-cur)/10; 
      speed=speed>0&#63;Math.ceil(speed):Math.floor(speed); 
      if(cur!=json[attr]){ 
        oStop=false; 
      } 
      if(attr=='opacity'){ 
        obj.style[attr]=(cur+speed)/100; 
        obj.style.filter="alpha(opacity:"+cur+speed+")"; 
      }else{ 
        obj.style[attr]=cur+speed+"px"; 
      } 
    } 
    if(oStop){ 
      clearInterval(obj.timer); 
      if(fnEnd)fnEnd(); 
    } 
  },30); 
 
}; 
function getStyle(obj,name){ 
  if(obj.currentStyle){ 
    return obj.currentStyle[name]; 
  }else{
    return getComputedStyle(obj,false)[name]; 
  }
};

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Bahagian CSS:

*{ margin: 0px; padding: 0px; } 
img{ 
border: none; width: 470px; height: 150px;
float: left;
} 
.pic_body li{
width: 470px; height: 150px;
float: left; z-index: 3001; } 
ul{
 list-style: none; position: absolute; top: 0px; left: 0px;
 width: 470px; height: 150px; background: yellow; z-index: 3000;
} 
#div1{ border: 1px solid black; width: 470px; height: 150px;
 position: relative; margin: 100px auto; padding: 0px;
 overflow: hidden;
} 
#div1 ol{ bottom: 10px; right: 10px; 
position: absolute; z-index: 9999; 
} 
ol li{ background: yellow; float: left; 
display: inline; margin-right: 3px; padding: 3px 4px;
position: relative; top: 0px; left: 0px;
font-family: arial; font-size: 12px;
cursor: pointer; filter: alpha(opacity:60); opacity: 0.6;
border: 1px solid black;
} 
.active{ background: yellow; font-weight: bolder;
padding: 4px 6px; filter: alpha(opacity:100); opacity: 1;
}

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Bahagian HTML:

<!DOCTYPE html> 
<html> 
<head lang="en"> 
  <meta charset="UTF-8"> 
  <title></title> 
  <link href="css.css" rel="stylesheet" type="text/css"> 
  <script src="myscript.js"></script> 
  <script> 
    window.onload=function() { 
      var now = 0; 
      var oDiv = document.getElementById('div1'); 
      var oOl = oDiv.getElementsByTagName('ol')[0]; 
      var oLi = oOl.getElementsByTagName('li'); 
      var oUl = getClass(oDiv, 'pic_body')[0]; 
      for(var i=0;i<oLi.length;i++){ 
        oLi[i].index=i; 
        oLi[i].onclick=function(){ 
          now=this.index; 
          tab(); 
        }; 
      } 
      function tab(){ 
        for(var i=0;i<oLi.length;i++){ 
          oLi[i].className=''; 
        } 
        oLi[now].className='active'; 
        startmove(oUl,{top:-150*now}); 
      }; 
      function next(){ 
        now++; 
        if(now==oLi.length){ 
          now=0; 
        } 
        tab(); 
      }; 
      var timer=setInterval(next,3000); 
      oUl.onmouseover=function(){ 
        clearInterval(timer); 
      }; 
      oUl.onmouseout=function(){ 
        timer=setInterval(next,3000); 
      }; 
    } 
  </script> 
</head> 
<body> 
<div id="div1"> 
  <ol> 
    <li class="active">1</li> 
    <li>2</li> 
    <li>3</li> 
    <li>4</li> 
    <li>5</li> 
  </ol> 
  <ul class="pic_body"> 
    <li><img src="image/1.jpg"></li> 
    <li><img src="image/2.jpg"></li> 
    <li><img src="image/3.jpg"></li> 
    <li><img src="image/4.jpg"></li> 
    <li><img src="image/5.jpg"></li> 
  </ul> 
</div> 
</body> 
</html>

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Saya harap artikel ini akan membantu reka bentuk pengaturcaraan JavaScript semua orang.