麻烦哪位大神帮我看看，为什么表单验证时点击验证按钮没有任何显示呢，而且输入框也会自动清空
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>表单验证1</title>
<style>
span {
font-size: 20px;
font-family: "微软雅黑";
font-weight: bold;
}
#input-text {
margin: 0 10px;
width: 500px;
height: 50px;
line-height: 60px;
border-radius: 10px;
outline: 0;
border: 1px solid #999999;
}
#alert {
width: 200px;
height: 30px;
padding-left: 50px;
}
#input-submit {
background-color: #2F79BA;
color: white;
font-weight: bold;
font-size: 18px;
width: 95px;
height: 60px;
line-height: 60px;
border: 0;
border-radius: 10px;
outline: 0;
}
</style>
<script type="text/javascript">
window.onload = function () {
var re = /[\u4e00-\u9fa5a-zA-Z0-9\-]{3,15}/g;
var oBtn = document.getElementById('input-submit');
var oInput = document.getElementById('input-text');
var ale = document.getElementById('alert');
oInput.onfocus = function () {
ale.innerHTML = "必填，长度为4到16个字符";
}
function show() {
if ( oInput.value == "") {
ale.innerHTML = "姓名不能为空";
}
else if (re.test(oInput.value) == True) {
ale.innerHTML = "名称格式正确";
}
}
}
</script>
</head>
<body>
<form method="post">
<label><span>名称</span>
<input type="text" name="myName" id="input-text"></label>
<input type="submit" value="验证" id="input-submit" onclick="show()">
<div id="alert" ></div>
</form>
</body>
</html>
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Html/CSS
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