TextBox Validation for 10 digits or numbers using jQuery and Regular Expressions

<input type="text" id="mobile" />
<input type="submit" id="btnValidate" value="Submit" onclick="return Validate()" />

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript">
    function Validate() {
        var mobile = document.getElementById("mobile").value;
        var pattern = /^\d{10}$/;
        if (pattern.test(mobile)) {
            alert("Your mobile number : " + mobile);
            return true;
        } else {
            alert("It is not valid mobile number.input 10 digits number!");
            return false;
        }
    }
</script>