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微博輸入數(shù)字及其總結

Original 2018-12-08 19:50:22 485
abstrakt:<!DOCTYPE html> <html> <head>          <meta charset="uft-8">         &
<!DOCTYPE html>
<html>
<head>
         <meta charset="uft-8">
         <title>微博輸入數(shù)字</title>
         <style type="text/css">
                   body{font-size: 12px;}
                  .box{width: 600px;height: 160px;border: 10px solid pink;margin: 0px auto;padding: 10px;}
                  .box img{float: left;}
                  .box1{float: left;margin-left: 255px;width: 150px;height: 24px;text-align: right;font-size: 14px;color:#888;}
                  .box1 span{font-size: 16px;font-weight: bold;}
                  #text{width: 600px;height: 100px;border: 1px solid blue;margin-top: 5px;}
                  .box #sp1,#sp2,#sp3,#sp4,#sp5,#sp6{float:left; width: 30px;height:32px;line-height: 32px;padding-left: 26px;}
                  #sp1{background:url(images/an5.png) no-repeat left center;}
                  #sp2{background:url(images/an4.png) no-repeat left center;}
                  #sp3{background:url(images/an3.png) no-repeat left center;}
                  #sp4{background:url(images/an2.png) no-repeat left center;}
                  #sp5{background:url(images/an1.png) no-repeat left center;width: 40px;}
                  #sp6{margin-left:150px;margin-right: 15px;color: #888;  }
                  #bu{float: left;width: 80px; height:30px; border: none;background: #ffc09f;color: #fff;border-radius: 5px;}
         </style>
    <script type="text/javascript">
             var number,text,n;
             window.onload=function(){
                     text=document.getElementById('text')
                     number=document.getElementById('number')
                     bu=document.getElementById('bu')
                     text.onkeyup=function aa(){
                              m=140-text.value.length//限制微博字數(shù)
                              if(m<0){
                                       number.style.color="red"
                              }else{
                                       number.style.color="#888"
                         }
                        number.innerHTML=m
                     }
                     bu.onclick=function(){
                              if(m==140){
                                       alert("你還沒有輸入")
                                       text.focus()
                              }else if(m<0) {
                                       alert("字數(shù)太多,不可以發(fā)布")
                                       text.focus()
                              }else{
                                       alert("發(fā)布成功")
                              }
                     }
                     aa()
             }
    </script>
</head>
<body>
         <div>
                  <img src="images/12.png" >
                  <div>還可以輸入<span id="number"></span>字</div>
                  <textarea id="text"></textarea>
                  <span id="sp1">表情</span>
                  <span id="sp2">圖片</span>
                  <span id="sp3">視頻</span>
                  <span id="sp4">話題</span>
                  <span id="sp5">長微博</span>
                  <span id="sp6">公開</span>
                  <input type="button" value="發(fā)布" id="bu">
         </div>
</body>
</html>

總結:

html元素的獲取

js事件的運用

函數(shù)的調(diào)用

該案例可以于 文字發(fā)布 的實際運用中

Korrigierender Lehrer:韋小寶Korrekturzeit:2018-12-09 09:15:41
Zusammenfassung des Lehrers:恩!寫的很不錯!這案例的確可以作為文字發(fā)布來用了!還是很不錯的!

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