<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>输入三个数字排序显示</title>
</head>
<body>
<p>第一个输入框</p>
<input type="text" id="a1"/>
<p>第二个输入框</p>
<input type="text" id="a2"/>
<p>第三个输入框</p>
<input type="text" id="a3"/><br/>
<button onclick="paixu()">排序结果：</button>
<p id="result"></p>
</body>
<script type="text/javascript">
var paixu = function () {
var a1,a2,a3;
a1=document.getElementById("a1").value;
a2=document.getElementById("a2").value;
a3=document.getElementById("a3").value;
a1=parseInt(a1);
a2=parseInt(a2);
a3=parseInt(a3);
var n=isNaN(a1);
console.log(n);
var str=[];
str.push(a1);
str.push(a2);
str.push(a3);
console.log(str);
str.sort();
console.log(str);
document.getElementById("result").innerHTML=str;
}
</script>
</html>
原文：http://www.cnblogs.com/mx2036/p/6775062.html