<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
姓名：<input type="text" id="uname" />
</body>
</html>
<input type="button" onclick="check();" value="提交" />
<script>
function check(){
if(!/^[\u4e00-\u9fa5]+$/gi.test(document.getElementById("uname").value))
alert("只能输入汉字");
else
alert("提交成功");
}
</script>
