ife-js-task/task18.html at master · glt18/ife-js-task · GitHub

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<!DOCTYPE html>
<html>
<head>
	<title>Task 18</title>
	<meta charset="utf-8">
	<style type="text/css">
		.display {
			display: inline-block;
			height: 40px;
			background-color: red;
			text-align: center;
			font-size: 30px;
			color: #ffffff;
			margin-right: 10px;
			margin-top: 5px;
			padding: 10px;
		}
	</style>
</head>
<body id="body">
	<input type="text" id="inputData">
	<button id="inLeft" onclick="inLeftFunc()">左侧入</button>
	<button id="inRight" onclick="inRightFunc()">右侧入</button>&nbsp;
	<button id="outLeft" onclick="outLeftFunc()">左侧出</button>
	<button id="outRight" onclick="outRightFunc()">右侧出</button>
	<div id="display"></div>
	<script type="text/javascript">
		var body = document.getElementById('body');
		var inputData = document.getElementById('inputData');
		var inLeft = document.getElementById('inLeft');
		var inRight = document.getElementById('inRight');
		var outLeft = document.getElementById('outLeft');
		var outRight = document.getElementById('outRight');
		var display = document.getElementById('display');
		function inLeftFunc() {
			if (inputData!="") {
				var div = document.createElement('div');
				div.setAttribute("class","display");
				div.innerHTML = inputData.value;
				display.insertBefore(div,display.firstChild);
				inputData.value = "";
			}
		}
		function inRightFunc() {
			if (inputData!="") {
				var div = document.createElement('div');
				div.setAttribute("class","display");
				div.innerHTML = inputData.value;
				display.appendChild(div);
				inputData.value = "";
			}
		}
		function outLeftFunc() {
			display.removeChild(display.firstChild);
		}
		function outRightFunc() {
			display.removeChild(display.lastChild);
		}
	</script>
</body>
</html>