输入界面展示:
输出结果展示:
实现代码:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<div>
<!-- 设计输入及点击界面 -->
<p>请输入您的出生日期(yyy/mm/dd):</p>
<input type="text" style="width: 60px;" id="year">/
<input type="text" style="width: 60px;" id="month">/
<input type="text" style="width: 60px;" id="day"></br>
<!-- 运用button标签并设置点击事件函数 -->
<button style="margin-top:10px " onclick="getAge()">计算</button>
</div>
<script>
//计算周岁年龄的函数
function getAge() {
//定义返回值
var returnAge
//获取输入框参数
var birthYear = document.getElementById("year").value
var birthMonth = document.getElementById("month").value
var birthDay = document.getElementById("day").value
//获取当前时间
d = new Date();
var nowYear = d.getFullYear()
var nowMonth = d.getMonth() + 1
var nowDay = d.getDate()
//计算周岁年龄差
if (nowYear == birthYear) {
returnAge = 0; //同年 则为0岁
} else {
var ageDiff = nowYear - birthYear //年之差
if (ageDiff > 0) {
if (nowMonth == birthMonth) {
var dayDiff = nowDay - birthDay //日之差
if (dayDiff < 0) {
returnAge = ageDiff - 1
} else {
returnAge = ageDiff
}
} else {
var monthDiff = nowMonth - birthMonth //月之差
if (monthDiff < 0) {
returnAge = ageDiff - 1
} else {
returnAge = ageDiff
}
}
} else {
returnAge = -1 //输入有误
}
}
alert(returnAge)//结果弹窗显示
}
</script>
</body>
</html>
