<form id="register" name="register" action="" method="POST" onsubmit="return validate_account_creation(this)">

    <label> Username
        <input type="text" name="username" />
    </label>

    <label> Password
        <input type="text" name="password" />
    </label>

    <input type="submit" name="submit" value="Submit" class="button"/>

</form>

function validate_username(username) {
        var regex = /[a-zA-Z0-9-_]{5,15}/g;
        var str = username;

        if (!regex.test(str)) {
            alert("Your username must be between 5 and 15 characters in length");
            register.username.focus();
            return false;
        }
    }

function validate_password(password) {
        regex = /[a-zA-Z]{5,}[0-9]{1,}/g;
        str = password;

        if (!regex.test(str)) {
            alert("Your password must be at least 6 characters in length and must contain at least 1 number");
            register.password.focus();
            return false;
        }
    }


//Validate register form
function validate_account_creation(form) {



return validate_username(form.username.value);
return validate_password(form.password.value);

return true;

}