zoukankan      html  css  js  c++  java
  • 添加或创建元素,最新消息在最上方

    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
    <title>Examples</title>
    <meta name="description" content="">
    <meta name="keywords" content="">
    <link href="" rel="stylesheet">
    <script>
        window.onload=function(){
            var oUl=document.getElementById("ul");
            var oBtn=document.getElementById("btn1");
            var oTxt=document.getElementById("txt1");
            var oLi=oUl.getElementsByTagName('li');
            oBtn.onclick=function(){
                var oA=document.createElement('li');
                    oA.innerHTML=oTxt.value;
                    if(oLi.length>0){
                        oUl.insertBefore(oA,oLi[0]);
                    }else{
                        oUl.appendChild(oA); 
                    }  
                }
            }
          
            
        
    </script>
    </head>
    <body>
        <h2>创建DOM元素</h2>
        <input type="text" id="txt1">
        <input type="button" value="创建" id="btn1">
        <ul id="ul"></ul>
    </body>
    </html>
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  • 原文地址:https://www.cnblogs.com/itsmart/p/8047737.html
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