<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script type="text/javascript">
function getAgeName(){
var age =document.getElementById('in').value;
document.getElementById('bnt');
if(!Number.parseInt(age)){
alert("年龄输出错误")
}
else if(age>=0&&age<=2){
document.getElementById('out').innerHTML="婴儿";
}
else if( age>=3&&age<=5){
document.getElementById('out').innerHTML="儿童";
}
else if(age>=6&&age<=12){
document.getElementById('out').innerHTML="少年";
}
else if( age>=13&&age<=18){
document.getElementById('out').innerHTML="青少年";
}
else if( age>=19&&age<=35){
document.getElementById('out').innerHTML="青壮年";
}
else if( age>=36&&age<=45){
document.getElementById('out').innerHTML="中年";
}
else if( age>=46){
document.getElementById('out').innerHTML="老年"
}
else {
alert("年龄输出错误")
}
}
</script>
</head>
<body>
<input style="text" id ="in" value=" " />
<input type="button" onclick="getAgeName()" value="年龄所对应的状态" id="bnt"/>
<div id="out">
</div>
</body>
</html>
