JS正则验证昵称：中文、英文及下划线

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>验证汉字</title>
</head>
<body>
<script type="text/javascript">
function reg_check_val(nickname){
 var regex = new RegExp("^([\u4E00-\uFA29]|[\uE7C7-\uE7F3]|[a-zA-Z0-9_]){1,10}$"); 
 var res = regex.test(nickname);
 if(res==true){
  alert("包含中英文字母或下划线");
  return true;
 }else{
  alert("不包含中英文字母或下划线");
  return false;
 }
}
reg_check_val('本站');
</script>
</body>
</html>