Regex: Minimum 8 Characters at least 1 UpperCase 1 LowerCase 1 number and 1 Special Character

    <input type="text" id="textbox1" value="Pass@1234" />
    <input type="button" id="Validate" onclick="ValidatePassword()" value="Validate" />
    <script type="text/javascript">
        function ValidatePassword() {
            var regex = /^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[#$@!%&*?])[A-Za-z\d#$@!%&*?]{10,12}$/;
            var txt = document.getElementById("textbox1");
            if (!regex.test(txt.value)) {
                alert("Password strength is not good.");
            } else {
                alert("Password strength is good.");
            }
        }
    </script>