JavaScript-如果模态关闭，请删除模态错误/成功消息

我创建了一个Twitter Bootstrap模式，其中包括表单提交。表格包括JavaScript验证。

当我关闭模态或单击其他任何地方，然后再次打开模态时，JS错误/成功样式仍然存在。

如果模态关闭或丢失了模式的焦点，我如何不出现CSS错误/成功样式？

html：

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" type="text/css">
    <link rel="stylesheet" href="${resource(dir: 'css', file: 'myStylesheet.css')}" type="text/css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<button class="btn btn-primary" data-toggle="modal" data-target="#add_new_record_modal">Add New Department</button>

<!-- Modal - Add New Record -->
    <div class="modal fade" id="add_new_record_modal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
        <div class="modal-dialog">
            <form id="addRecordForm" role="form" method="post" onsubmit="return addDepartmentValidation();">
                <div class="modal-content">
                    <div class="modal-header">
                        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
                        <h4 class="modal-title" id="myModalLabel">Add New Department</h4>
                    </div>
                    <div class="modal-body">
                        <p><span class="required">* required field</span></p>
                        <div class="form-group">
                            <label for="department_name">Department Name</label>
                            <span class="required">*</span>
                            <div class="input-group">
                                <span class="input-group-addon transparent"><span class="glyphicon glyphicon-briefcase"></span></span>
                            <input type="text" id="department_name" placeholder="Enter Department Name" autocomplete="off" name="department_name" class="form-control" onkeyup="addDepartmentNameValidation();"/>
                            </div>
                            <div class="error-messages" id="department_name_errors"></div>
                        </div>
                        <div class="form-group">
                            <label for="department_street">Department Street</label>
                            <span class="required">*</span>
                            <div class="input-group">
                                <span class="input-group-addon transparent"><span class="glyphicon glyphicon-briefcase"></span></span>
                            <input type="text" id="department_street" placeholder="Enter Department Street" autocomplete="off" name="department_street" class="form-control" onkeyup="addDepartmentStreetValidation();"/>
                            </div>
                            <div class="error-messages" id="department_street_errors"></div>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-danger" data-dismiss="modal">Cancel</button>
                        <button type="submit" class="btn btn-primary from-control" value="addRecord">Add Department</button>
                    </div>
                </div>
            </form>
        </div>
    </div>

CSS：

.container .jumbotron        /* employees-departmentents jumbotron */
{
    margin-top: 100px;
}
.modal-dialog .modal-content .modal-header /* Update/Add Record Modals Headers */
{
    background-color: #2A6496;
    color: white;
}
.required                   /* Required Fields at Forms */
{
    color: red;
    font-weight: bold;
}
.error-messages
{
    color: red;
    font-weight: bold;
}

javaScript：

window.addDepartmentValidation = function(){
    var add_department_name_validation_value = addDepartmentNameValidation();
    var add_department_street_validation_value = addDepartmentStreetValidation();
    if ( (add_department_name_validation_value)&&(add_department_street_validation_value) ) return true;    // form successfully submitted
    else return false;  // form still has errors
}
window.addDepartmentNameValidation = function(){
    var returned_value = true;
    var dep_name = document.getElementById('department_name').value;
    if (dep_name.length <= 2) {
        document.getElementById('department_name').style.borderColor = "red";
        document.getElementById('department_name').style.borderWidth = "2px 2px 2px 2px";
        document.getElementById('department_name_errors').style.color = "red";
        document.getElementById('department_name_errors').innerHTML = "Department Name is way too short!!!";
        if (dep_name === "") {
            document.getElementById('department_name_errors').innerHTML = "Please enter a Department Name!!!";
        }
        returned_value = false;
    }
    else {
        document.getElementById('department_name').style.borderColor = "green";
        document.getElementById('department_name_errors').style.color = "green";
        document.getElementById('department_name_errors').innerHTML = "Department Name is: VALID";
    }
    if (document.getElementById('department_name').value.match(/(1|2|3|4|5|6|7|8|9|0)/)) {
        document.getElementById('department_name').style.borderColor = "red";
        document.getElementById('department_name_errors').style.color = "red";
        document.getElementById('department_name_errors').innerHTML = "Department Name must NOT contain numbers!!!";
        returned_value = false;
    }
    return returned_value;
}
window.addDepartmentStreetValidation = function(){
    var returned_value = true;
    var dep_street = document.getElementById('department_street').value;
    if (dep_street.length <= 2) {
        document.getElementById('department_street').style.borderColor = "red";
        document.getElementById('department_street').style.borderWidth = "2px 2px 2px 2px";
        document.getElementById('department_street_errors').style.color = "red";
        document.getElementById('department_street_errors').innerHTML = "Department Street is way too short!!!";
        if (dep_street === "") {
            document.getElementById('department_street_errors').innerHTML = "Please enter a Department Street!!!";
        }
        returned_value = false;
    }
    else {
        document.getElementById('department_street').style.borderColor = "green";
        document.getElementById('department_street_errors').style.color = "green";
        document.getElementById('department_street_errors').innerHTML = "Department Street is: VALID";
    }
    return returned_value;
}

链接到jsfiddle：https：//jsfiddle.net/vagg77/88sqeran/

您需要处理模态关闭事件。

例如：

$('#add_new_record_modal').on('hidden.bs.modal', function () {
   $('#department_street_errors').text('');
   $('#department_name_errors').text('');
   $('#department_name').removeAttr('style');
   $('#department_street').removeAttr('style');
})

https://jsfiddle.net/88-Sqeran/9/

javaScript中写一个重置函数，类似。

window.resetForm = function(){
    document.getElementById('department_name').style.borderColor = "rgb(204,204,204)";
    document.getElementById('department_name').style.borderWidth = "1px";
    document.getElementById('department_name_errors').style.color = "#555";
    document.getElementById('department_name_errors').innerHTML = "";
    document.getElementById('department_street').style.borderColor = "rgb(204,204,204)";
    document.getElementById('department_street').style.borderWidth = "1px";
    document.getElementById('department_street_errors').style.color = "#555";
    document.getElementById('department_street_errors').innerHTML = "";
}

在您的模态按钮上添加一个单击事件，以每次加载模式时重置表格。

<button class="btn btn-primary" onclick="resetForm();" data-toggle="modal" data-target="#add_new_record_modal">Add New Department</button>

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