我的作业 谢谢老师
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>我的作业</title>
<style media="screen">
*{margin: 0px;height: 0px;}
#CeShi{width: 200px;height: 200px;background-color: pink;margin: 50px 130px;}
input{width: 80px;height: 30px;text-align: center;line-height: 30px;}
</style>
</head>
<body>
<script type="text/javascript">
var box;
window.onload=function(){
box=document.getElementById('CeShi')
}
function Widths(){
box.style.width="400px"
}
function Heights(){
box.style.height="400px"
}
function Colors(){
box.style.backgroundColor="red"
}
function Reductions(){
box.style.width="200px"
box.style.height="200px"
box.style.backgroundColor="pink"
}
function Hides(){
box.style.display="none"
}
function Displays(){
box.style.display="block"
}
</script>
<div id="CeShi"></div>
<input type="button" name="" value="改变宽度"onclick="Widths()">
<input type="button" name="" value="改变高度"onclick="Heights()">
<input type="button" name="" value="改变颜色"onclick="Colors()">
<input type="button" name="" value="还原"onclick="Reductions()">
<input type="button" name="" value="隐藏"onclick="Hides()">
<input type="button" name="" value="显示"onclick="Displays()">
</body>
</html>
老师讲的时候看着很简单,也都明白,到了自己练习,就出了各种问题,大多是因为粗心造成的,丢三落四,还是需要加强练习,养成好的书写习惯