標籤：window 設定 padding 拖動 elements onload ash var tle
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>微博發布</title>
<style type="text/css">
*{
padding: 0;
margin: 0;
}
ul {
list-style: none;
}
.box {
width: 600px;
height: auto;
margin: 100px auto;
text-align: center;
padding: 30px 0;
}
.box textarea {
width: 450px;
resize: none; /*設定文本不能過拖動*/
}
.box li {
width: 450px;
line-height: 30px;
border-bottom: 1px dashed #ccc;
margin-left: 80px;
text-align: left;
}
.box li a {
float: right;
}
</style>
<script type="text/javascript">
window.onload = function (){
var btn = document.getElementsByTagName("button")[0];
var txt = document.getElementsByTagName("textarea")[0];
var ul = document.createElement("ul");
btn.parentNode.appendChild(ul);
btn.onclick = function (){
//1.需要判斷文本中是否有內容
if(txt.value == ""){
alert("親!內容不可為空哦!!");
return false; // 讓操作就在這個地方終止
}
var newli = document.createElement("li");
newli.innerHTML = txt.value +"<a href=‘javascript:;‘>刪除</a>";
ul.appendChild(newli);
//清空輸入框
txt.value = "";
var aa = document.getElementsByTagName("a");//擷取所有的a標籤
for(var i = 0;i<aa.length;i++){
aa[i].onclick = function () {
this.parentNode.remove();
}
}
}
}
</script>
</head>
<body>
<div class="box">
微博發布:<textarea name="" id="" cols="30" rows="10"></textarea>
<button>發布</button>
</div>
</body>
</html>
JS-微博發布
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