麻烦老师帮忙检查一下，谢谢！
来源：3-12 编程练习
胜己
2020-02-15 15:13:43
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>onchange()</title>
<style type="text/css">
#div{
width:300px;
height:300px;
border:2px solid gray;
margin:100px 0 0 200px;
}
</style>
<script type="text/javascript">
//补充代码
window.onload = function() {
var color = document.getElementById("color");
var div = document.getElementById("div");
color.onchange = function() {
if(this.value == "0") {
div.innerHTML = "我没有发生任何变化";
div.style.backgroundColor = "#fff";
}else if(this.value == "yellow") {
div.innerHTML = "我的背景颜色变成了" + this.value + "色";
div.style.backgroundColor = "yellow";
}else if(this.value == "orange") {
div.innerHTML = "我的背景颜色变成了" + this.value + "色";
div.style.backgroundColor = "orange";
}else if(this.value == "pink") {
div.innerHTML = "我的背景颜色变成了" + this.value + "色";
div.style.backgroundColor = "pink";
}else if(this.value == "purple") {
div.innerHTML = "我的背景颜色变成了" + this.value + "色";
div.style.backgroundColor = "purple";
}
}
}
</script>
</head>
<body>
<div>
<span>请选择您喜欢的颜色:</span>
<select id="color">
<option value="0">请选择</option>
<option value="yellow">黄色</option>
<option value="orange">橘色</option>
<option value="pink">粉色</option>
<option value="purple">紫色</option>
</select>
</div>
<div id="div">我是div</div>
</body>
</html>写回答
1回答
-
同学你好，代码实现的是正确的，继续加油，祝学习愉快~
0
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