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杨老师课堂之JavaScript右下角广告弹框

日期：2018-05-11点击：504收藏

预览效果图：

Html代码：

<html>
<body>
<div id="silu">
<button onclick="tips_pop()">3秒后会在右下角自动弹出窗口，如果没有弹出请点击这个按钮</button>
</div>
<div id="winpop">
<div class="title">您有新的短消息！<span class="close" onclick="tips_pop()">X</span></div>
    <div class="con">1条未读信息(</div>
</div>
</body>
</html>

Css代码：

#winpop {
    width: 200px;
    height: 0px;
    position: absolute;
    right: 0;
    bottom: 0;
    border: 1px solid #666;
    margin: 0;
    padding: 1px;
    overflow: hidden;
    display: none;
}

#winpop .title {
    width: 100%;
    height: 22px;
    line-height: 20px;
    background: #FFCC00;
    font-weight: bold;
    text-align: center;
    font-size: 12px;
}

#winpop .con {
    width: 100%;
    height: 90px;
    line-height: 80px;
    font-weight: bold;
    font-size: 12px;
    color: #FF0000;
    text-decoration: underline;
    text-align: center;
}

#silu {
    font-size: 12px;
    color: #666;
    position: absolute;
    right: 0;
    text-align: right;
    text-decoration: underline;
    line-height: 22px;
}

.close {
    position: absolute;
    right: 4px;
    top: -1px;
    color: #FFF;
    cursor: pointer;
}

JavaScript代码：

window.onload=function(){//加载
    document.getElementById('winpop').style.height='0px';
    setTimeout("tips_pop()",800);//3秒后调用tips_pop()这个函数
    } 
function tips_pop(){
  var MsgPop=document.getElementById("winpop");
  var popH=parseInt(MsgPop.style.height);//将对象的高度转化为数字
   if (popH==0){
   MsgPop.style.display="block";//显示隐藏的窗口
  show=setInterval("changeH('up')",2);
   }
  else { 
   hide=setInterval("changeH('down')",2);
  }
}
function changeH(str) {
 var MsgPop=document.getElementById("winpop");
 var popH=parseInt(MsgPop.style.height);
 if(str=="up"){
  if (popH<=100){
  MsgPop.style.height=(popH+4).toString()+"px";
  }
  else{  
  clearInterval(show);
  }
 }
 if(str=="down"){ 
  if (popH>=4){  
  MsgPop.style.height=(popH-4).toString()+"px";
  }
  else{ 
  clearInterval(hide);   
  MsgPop.style.display="none";  //隐藏DIV
  }
 }
}