js实现给网页换背景this实现 

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			body{
				/* background: yellow; */
			}
		</style>
		
		<script type="text/javascript">
			window.onload = function(){
				var btn = document.getElementsByTagName('button');
				// console.log(btn[1].name);
				for(var i = 0; i < btn.length; i++){
					btn[i].index = i;
					btn[i].onclick = function(){
						document.body.style.background = btn[this.index].name;
					}
				}
			}
		</script>
	</head>
	<body>
		<button type="button" name="yellow">黄色</button>
		<button type="button" name="red">红色</button>
		<button type="button" name="pink">粉色</button>
	</body>
</html>

 

posted @ 2020-03-22 17:08  JackieDYH  阅读(7)  评论(0)  编辑  收藏  举报  来源