用js编写留言板 - 自学编程网

本文实例为大家分享了js编写留言板的具体代码，供大家参考，具体内容如下
<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>Document</title>
 <style type="text/css">
 *{
  margin:0px;
  padding: 0px;
  font-size: 12px;
 }
 .tie{
  width: 70px;
  height: 30px;
  background:pink;
  border-radius: 10%;
 }
 .an{
  width: 70px;
  height: 30px;
  background:pink;
  border-radius: 10%;
 }
 .allFather{
  position: fixed;
  left: 250px;
  top: 0px;
  border:1px solid gray;
  width: 300px;
  height: 300px;
 }
 .wenb{
  width: 260px;
  height:25px;
  margin-top: 10px;
  margin-left: 10px;
  color: gray;
 }
 .two{
  margin-top: 10px;
  margin-left: 10px;
 }
 .jj{
  width: 120px;
  height: 25px;
 }
 .kk{
  margin-top: 10px;
  margin-left: 10px;
  width: 260px;
 }
 .an{
  margin-top: 10px;
  margin-left: 10px;
 }
 </style>
</head>
<body>
 <button class="tie">我要发帖</button>
 <ul class="items"></ul>
 <div class="allFather" style="display: none;">
 <input type="text" value="请输入标题(1-60个字符)" class="wenb">
 <div class="two">
  所属板块
  <select name="" id="wyd" class="jj">
  <option value="">英雄联盟</option>
  <option value="">穿越火线</option>
  <option value="">qq飞车</option>
  <option value="">地下城与勇士</option>
  <option value="">逆战</option>
  </select>
 </div>
 <textarea name="" id="" cols="30" rows="10" class="kk"></textarea>
 <button "cz()" class="an">发布</button>
 </div>
</body>
 <script type="text/javascript">
 //点击时使发帖界面显示
 var tie = document.getElementsByClassName('tie')[0];
 tie.onclick = function(){
  document.getElementsByClassName('allFather')[0].style.display = "block";
 }
 //获得节点上传
 var bt = document.getElementsByClassName("wenb")[0];//获得标题
 var bk = document.getElementById('wyd');//获得板块
 var jio = document.getElementsByClassName('kk')[0];//获得多行文本框内容
 var time = new Date();//获得时间
 var nian = time.getFullYear();//获得年份
 var dt = time.getMonth();//获得月份
 var r = time.getDate();//获得日期
 var shi = time.getHours();//获得小时
 var fen = time.getMinutes();//获得分钟
 //实现上传
 var items = document.getElementsByClassName('items')[0];//获得ul的节点属性
 //实现创造新节点
 //焦点聚集事件
 bt.onfocus = function(){
  bt.value = "";
  }
 function cz(){
  //先创建li的节点
  var Li = document.createElement('li');
  //然后插入到ul中
  items.appendChild(Li);
  Li.style.listStyle = "none";
  //创建图片
  var img = document.createElement('img');
  Li.appendChild(img);//在li中插入图片

  var isz = ['../images/sdg.jpg','../images/dfggfhs.jpg'];//一个图片的数组
  var index = Math.floor(Math.random()*2);
  img.style.width = "50px";
  img.style.height = "50px";
  img.style.borderRadius = "50%";
  img.setAttribute('src',isz[index]);


  //创建图片右边内容的大盒子
  var hfather = document.createElement('div');
  Li.appendChild(hfather);//插入大盒子
  //实现盒子左浮动
  hfather.style.display = "inline-block";


  //创建标题
  var libt = document.createElement('p');
  hfather.appendChild(libt);
  libt.style.fontSize = "20px";
  libt.style.color = "black";
  libt.style.fontWeight = "bloder";
  libt.style.marginBottom = "5px";
  libt.innerHTML = bt.value;//填充内容


  //创建板块
  var text = "";
  for(i = 0;i < bk.length; i++) {//下拉框的长度就是它的选项数.

       if(bk[i].selected == true) {

       text = bk[i].innerHTML;//获取当前选择项的值.

　　　　　　 }

　　　　　　}
  var bkl = document.createElement('span');
  hfather.appendChild(bkl);
  bkl.style.color = "gray";
  bkl.innerHTML = "板块:" + text;
  console.log(bkl.innerHTML);

  //创建时间板块
  var tbk = document.createElement('span');
  hfather.appendChild(tbk);
  tbk.style.marginLeft = "15px";
  tbk.style.color = "gray";
  tbk.innerHTML = "发表时间:" + nian + "-" + (dt+1) + "-" + r + "&nbsp;" + shi + ":" + fen;


  document.getElementsByClassName('allFather')[0].style.display = "none";
  bt.value = "请输入标题(1-60个字符)";
  jio.value = "";
  bk[0].selected = true;
 }
 
 </script>
</html>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持自学编程网。
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