为什么if语句不管用呢?帮忙解答一下,谢谢!
<!DOCTYPE html>
<html lang="en">
<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></title>
<link rel="stylesheet" href="04.css">
<style type="text/css">
#test{
background:green;
margin:10px auto;
}
#btn{
margin:10px auto;
display:block;
}
</style>
<script type="text/javascript" rel="script">
window.onload=function(){
var a=document.getElementById("btn");
var b=document.getElementById("test");
a.onclick=function(){
var jw=parseInt(b.style.width);
var jh=parseInt(b.style.height);
var nw=jw+10+"px";
var nh=jh+10+"px";
if(nw>="100px"){
b.style.width="100px";
}else{
b.style.width=nw;
};
b.style.width=nw;
b.style.height=nh;
};
};
</script>
</head>
<body>
<button id="btn">Max</button>
<div id="test" style="width:100px;height:100px"></div>
</body>
</html>