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練習(xí)-微博輸入

オリジナル 2019-02-26 23:41:09 367
サマリー:<!DOCTYPE html /><html> <head>     <meta charset="utf-8" />     <title>練習(xí)-微博輸入</title>    

<!DOCTYPE html />

<html>

<head>

     <meta charset="utf-8" />

     <title>練習(xí)-微博輸入</title>

     <style>

         *{

             margin:0px;

             padding:0px;

         }

         .box_a1{

             width:600px;

             height:160px;

             margin:10px auto;

             padding:10px 10px;

             border:10px solid pink;

         }

         .box_c1{

             float:right;

             color:#888;

             font-size:14px;

         }

         #textarea{

             width:100%;

             height:100px;

             margin:8px 0px;

             padding:3px;

         }

         .box_b3 a{

             float: left;

             font-size:13px;

             line-height: 25px;

             padding-left: 26px;

         }

         .a1{

              background: url(images/wb/an5.png) no-repeat;

         }

         .a2{

             background: url(images/wb/an4.png) no-repeat;

         }

         .a3{

              background: url(images/wb/an3.png) no-repeat;

         }

         .a4{

              background: url(images/wb/an2.png) no-repeat;

         }

         .a5{

              background: url(images/wb/an1.png) no-repeat;

         }

         #bt{

             float:right;

             width:50px;

             height:25px;

             background:#FFC09F;

             color:#fff;

             border:none;

             margin:0px 5px;

             border-radius:5px;

         }

    </style>


    <script>

         var textarea,fon,x;

           window.onload=function (){     //獲取標(biāo)簽

             textarea=document.getElementById("textarea");

             fon=document.getElementById("fon");

             bt=document.getElementById("bt");

             textarea.onkeyup=function up(){  //計(jì)算剩余可輸入的字?jǐn)?shù)

                 x=140-textarea.value.length;

                 fon.innerHTML=x;

             };


             bt.onclick=function (){   //判斷條件,只有字?jǐn)?shù)在1-140之間才能顯示發(fā)布成功

                 if (x==140){

                     alert("請(qǐng)輸入內(nèi)容");

                     textarea.focus();

                 }else if (x<0){

                     alert("輸入內(nèi)容過(guò)多");

                     textarea.focus();

                }else{

                      alert("發(fā)布成功");

                 }

            }


            up();

        }


    </script>

</head>

<body>

     <div class="box_a1">

         <div class="box_b1">

             <image src="images/wb/12.png">

             <div class="box_c1">還可以輸入<span id="fon""></span>字</div>

         </div>

         <div class="box_b2">

              <textarea id="textarea" ></textarea>

         </div>

         <div class="box_b3">

             <a class="a1">表情</a>

             <a class="a2">圖片</a>

             <a class="a3">視頻</a>

             <a class="a4">話(huà)題</a>

             <a class="a5">長(zhǎng)微博</a>

             <input type="button" value="發(fā)布" id="bt">

             <a style="color:#aaa;float:right;margin-right:10px;">公開(kāi)</a>

         </div>

     </div>

</body>

</html>


添削の先生:韋小寶添削時(shí)間:2019-02-27 09:22:14
先生のまとめ:寫(xiě)的很不錯(cuò) 這節(jié)課主要也就是練習(xí)了對(duì)輸入框的限制 還有一些樣式布局等

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