检测邮箱输入代码如下：
<!DOCTYPE html>
<html><head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><title>检查是否是邮箱</title><meta name="description" content=""><meta name="keywords" content=""><link href="" rel="stylesheet"></head><body> <form> <label>邮箱：</label><input type="text" οnkeyup="email(this)"> </form> <script> function email (argument) { var aa=argument.value; var myreg = /^([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,3}$/; if(!myreg.test(aa)){alert("邮箱输入不合法");
}
// body... }
</script>
</body></html>