形式正在被取代,当它不应该

时间:2013-01-08 02:21:53

标签: php javascript html

我有一个您可以在此处访问的应用程序:application

现在在应用程序中,将模块下拉菜单保留到Please Select选项并提交。您将看到一条消息,指出要选择一个模块。所以现在从下拉列表中选择一个模块并提交。您可以看到它下面显示了Assessment下拉菜单(与该模块相关的评估)。

现在,我希望Assessment下拉菜单的执行方式与Module下拉菜单相同。如果没有选择任何评估,则在下方显示一条消息,如果选择了评估,则使用Assessment下拉菜单显示下面的下一个表单,并提交仍显示为Module下拉菜单,并提交仍然是显示在页面上。

问题是,因为您将能够看到您是否选择评估选项,而是由下一个表单块(显示多个选择框)替换它。如果用户在提交时没有在下拉菜单中选择评估,或者在评估下拉菜单下显示评估下拉菜单并在选择评估时提交按钮,而不是替换它,我希望不显示选择框。

但是造成这种情况的原因是什么?我可以让它来执行应该执行的功能吗?

以下是代码的缩短版本:

代码:

 <script type="text/javascript">


    function validation(e) {

                    var isDataValid = true;

                    var moduleTextO = document.getElementById("modulesDrop");

                    var errModuleMsgO = document.getElementById("moduleAlert");

             if (moduleTextO.value == ""){
              $('#targetdiv').hide();
              $('#assessmentForm').hide();
              errModuleMsgO.innerHTML = "Please Select a Module";
              isDataValid = false;    
            }else{
                    errModuleMsgO.innerHTML = ""; 
                    $('#assessmentForm').show();
                }

                    if (isDataValid === false)
        {
            if (e.preventDefault)
            {
                e.preventDefault();
                e.stopPropagation();//VERY important
            }
            e.returnValue = false;
            e.cancelBubble = true;
        }

                return isDataValid;

                }


                function sessionvalidation(e) {

                    var isDataValid = true;

                    var sessionTextO = document.getElementById("sessionsDrop");

                    var errAssesMsgO = document.getElementById("assessmentAlert");

             if (sessionTextO.value == ""){
              $('#assessmentdiv').hide();
              $('#studentExistForm').hide();
              errAssesMsgO.innerHTML = "Please Select an Assessment";
              isDataValid = false;    
            }else{
                    errAssesMsgO.innerHTML = ""; 
                    $('#studentExistForm').show();   
                     $('#assessmentForm').show();
                }

                    if (isDataValid === false)
        {
            if (e.preventDefault)
            {
                e.preventDefault();
                e.stopPropagation();//VERY important
            }
            e.returnValue = false;
            e.cancelBubble = true;
        }

                return isDataValid;

                }


                </script>

        <?php

    $moduleHTML  = "";  
    $moduleHTML .= '<select name="modules" id="modulesDrop">'.PHP_EOL;
    $moduleHTML .= '<option value="">Please Select</option>'.PHP_EOL;  
    $moduleHTML .= '</select>'; 


        ?>


    <form action="<?php echo htmlentities($_SERVER['PHP_SELF']); ?>" method="post" onsubmit="return validation(event);">
    <table>
    <tr>
    <th>Module: <?php echo $moduleHTML; ?></th>
    </tr>
    </table>
    <p><input id="moduleSubmit" type="submit" value="Submit Module" name="moduleSubmit" /></p>
    <div id="moduleAlert"></div>
    <div id="targetdiv"></div>
    </form>

    <?php

    if (isset($_POST['moduleSubmit'])) {    

     $moduleInfo = explode("_", $_POST['modules']);
     $moduleNo = $moduleInfo[0];
     $moduleName = $moduleInfo[1];
     $moduleId = $moduleInfo[2];
     $outputmodule = sprintf("<p><strong>Selected Module:</strong> %s - %s <input type='hidden' value='%s'></p>", $moduleNo, $moduleName, $moduleId);


    $sessionHTML = '';  
    $sessionHTML = '<select name="session" id="sessionsDrop">'.PHP_EOL;
    $sessionHTML .= '<option value="">Please Select</option>'.PHP_EOL;           
    $sessionHTML .= sprintf("<option value='%s'>%s - %s - %s</option>", $dbSessionId, $dbSessionName, date("d-m-Y",strtotime($dbSessionDate)), date("H:i",strtotime($dbSessionTime))) . PHP_EOL;            
    $sessionHTML .= '</select>';

    $assessmentform = "<div id='lt-container'>
    <form action='".htmlentities($_SERVER['PHP_SELF'])."' method='post' id='assessmentForm'>
    {$outputmodule}
    <p><strong>Assessments:</strong> {$sessionHTML} </p>  
    <p><input id='assessmentSubmit' type='submit' value='Submit Assessment' name='assessmentSubmit' /></p>
    <div id='assessmentAlert'></div>
    <div id='assessmentdiv'></div> 
    </form>
    </div>";

    echo $assessmentform;

    }

    if (isset($_POST['assessmentSubmit'])) {     

    $studentHTML = '';      
    $studentSELECT = '<select name="studenttextarea" id="studentselect" size="6">'.PHP_EOL;      
    $studentSELECT .= "<option disabled='disabled' class='red' value=''>No Students currently in this Assessment</option>"; 
    $studentSELECT .= sprintf("<option disabled='disabled' value='%s'>%s - %s %s</option>", $dbStudentId, $dbStudentAlias, $dbStudentForename, $dbStudentSurname) . PHP_EOL;    
    $studentSELECT .= '</select>';

    $studentexist="
    <form id='studentExistForm'>
    <p><strong>Current Active Students in Assessment:</strong></p>
    <p>{$studentSELECT}</p>
    </form> 
    </div>";

    echo $studentexist;

    }

    ?>

1 个答案:

答案 0 :(得分:1)

它没有显示第二部分的原因是因为当您点击评估提交表单时,$_POST['moduleSubmit']将不会被设置。

你可以改变

if (isset($_POST['moduleSubmit']))

if (isset($_POST['moduleSubmit']) || isset($_POST['assessmentSubmit']))

这样就可以显示该部分(如果已提交表格)