<!doctype?html>
<html>
<head>
<meta?charset="UTF-8">
<title>Document</title>
<script?type="text/JavaScript">
function?yunfei_s(str)?{
var?shijifeiyong = 2000111;
var?percen=document.getElementById("percen").value;
var?tz=document.getElementById("tz").value;
var?zongfeiyong;
zongfeiyong?=?shijifeiyong*(percen/100)+tz;
document.getElementById?('result').innerHTML?=??parseFloat(zongfeiyong).toFixed(2);
}
</script>
<script?type="text/javascript">
var?num?=?new?Number(13.37343543214312);
document.write?(num.toFixed(1))
</script>
</head>
<body>
<input?id="percen"?type="text">
<input?id="tz"?type="text">
<input?type="button"?value="ok"?onclick="yunfei_s(1)">
<span?id="result"></span>
</body>
</html>
思维有问题。。。。。
parseFloat(zongfeiyong).toFixed(2);
改成这样应该能运行了