html+JavaScript验证输入信息
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="images/logo.ico"rel="icon" type="image/logo-icon">
<title>员工防伪</title>
<style type="text/css">
@import url("css/qiye.css");
@import url("css/employee_anti_counterfeiting.css");
</style>
<script>
window.onload=function(){
var emp=document.getElementById("td2").value;
var sub=document.getElementById("th1");
sub.onclick=function(){
if(emp=="小黄"||"123456"||"www"){
alert("存在该员工")
}else if(emp==""){
alert("请输入要查询的员工花名、微信号、或手机号等")
}else{
alert("不存在该员工")
}
}
}
</script>
</head>
<body>
<iframe src="daohang.html"class="iframe1"></iframe>
<div class="box9">
<h1 style="font-size:50px;color: white;text-align: center;padding-top:200px ;">三只羊网络员工防伪查询</h1>
<table class="table1"width="300px">
<form action=""method="get">
<tr>
<td class="td1"><input class="td2" type="text"placeholder="请输入三只羊花名/手机号/真实姓名/微信号"id="td2"></td>
<th ><input class="th1"type="submit"value="查询"id="th1"></th>
</tr>
</form>
</table>
</div>
<iframe src="foot.html"class="iframe2"></iframe>
</body>
</html>
```
