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来源：1-19 自由编程

独孤求戒

2019-04-24 20:20:40

<!DOCTYPE html >

<html>
<head>
<meta charset="UTF-8">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQuery练习</title>

<style type="text/css">
.div1{

	float: left;
	width: 50px;
	line-height: 30px;
	background-color: lightgray;
	margin-left: 10px;
	text-align: center;
	vertical-align: middle;
}
.div2{
	width: 300px;
	height: 300px;
	border: solid gray 1px;
	margin-top: 60px;
	color: red;
	}
</style>


</head>
<body>
	<h2>请选择背景颜色</h2>
	<div>
	<div id="blue" class="div1">蓝色</div>
	<div id="green" class="div1">绿色</div>
	</div>
	<div class="div2" id="bg">
	</div>
	<div>输入颜色首字母： <input type="text" name="color"></div>
	<script type="text/javascript" src="js/jquery-3.4.0.js"></script>
	<script type="text/javascript">
		$(document).ready(function(){
			alert("欢迎来到来到设置颜色的界面");
		});
		$("#blue").click(function(
		 $(".div2").css("background","blue");
		 $(".div2").text("蓝色背景");
		));
		$("#green").click(function(){
			$("div2").css("background","green");
			$(".div2").text("<font>绿色背景</font>");
		});
		$("input").keypress(function(event){
			if(event.keyCode==66){
				$("div2").css("background","blue");
				$("div2").text("");
			}
		});
		$("input").keypress(function(event){
			if(event.keyCode==71){
				$("div2").css("background","green");
				$("div2").text("");
			}
		});
	</script>
</body>
</html>

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