Complete Form Validation JavaScript Part 4

    //function checks for empty fields
    function CheckEmpty(field_id){
        //
        var MyValue = document.getElementById(field_id);
        if(MyValue.value == "" || MyValue.value == null){
            //code
            displayWarning(field_id, MyValue.parentNode.id, "You can't leave this empty.");
        }
    }

    //function validates the given email id
    function ValidateEmail(email){
        var MyEmail = document.getElementById(email);
        var format = /.+@.+/;
        if(!MyEmail.value.match(format)){
            displayWarning(email, MyEmail.parentNode.id, "Please enter a valid email.");
        };
    }

    //function validates the password field
    function ValidatePassword(password){
        var MyPassword=document.getElementById(password);
        var format = /(?=^.{8,}$)(?=.*\d)(?=.*[!@#$%^&*]+)(?![.\n])(?=.*[A-Z])(?=.*[a-z]).*$/;
        if(!MyPassword.value.match(format)){
            displayWarning(password, MyPassword.parentNode.id, "The password must be a combination of Uppercase, Lowercase, Numbers, Special characters and at least 8 characters long.");
        }
    }

    //function confirms that passwords are the same
    function ConfirmPassword(password, confirm_password){
        var Password=document.getElementById(password);
        var ConfirmPassword = document.getElementById(confirm_password);
        if(ConfirmPassword.value !== Password.value){
            displayWarning(confirm_password, ConfirmPassword.parentNode.id, "Please enter the same password in both fields.");
        }
    }

    //function checks the checkboxes
    function ValidateCheckbox(checkbox){
        var check_box = document.getElementById(checkbox);
        if(check_box.checked == false){
            //code
            displayWarning(checkbox, check_box.parentNode.parentNode.id, "You must agree to proceed.");
        }
    }

    //function validates the selections
    function ValidateSelect(select){
        //code
        selected = document.getElementById(select);
        if(selected.selectedIndex == 0){
            //code
            displayWarning(select, selected.parentNode.id, "Please select your country.");
        }
    }

    //function displays the error message
    function displayWarning(field_id, parent_div, message){
        var x = document.getElementById(parent_div).querySelectorAll(".warning_msg").length;
        if(x === 0 ){
            var para = document.createElement("p");
            para.setAttribute("class","warning_msg");
            var error_msg = document.createTextNode(message);
            para.appendChild(error_msg);
            document.getElementById(parent_div).appendChild(para);
            document.getElementById(field_id).className += " warning_brd";
        };


    }