下面我有一个表格和一个 javascript 验证函数:
HTML表格:
<p><strong>New Course Details:</strong></p>
<table>
<tr>
<th></th>
<td><input type='hidden' id='newCourseId' name='CourseIdnew' value='' /> </td>
</tr>
<tr>
<th>Course ID:</th>
<td><input type='text' id='newCourseNo' name='CourseNoNew' value='' /> </td>
</tr>
<div id='courseidAlert'></div>
<tr>
<th>Course Name:</th>
<td><input type='text' id='newCourseName' name='CourseNameNew' value='' /> </td>
</tr>
<div id='coursenameAlert'></div>
<tr>
<th>Duration (Years):</th>
<td id='data'>{$durationHTML}</td>
</tr>
<div id='durationAlert'></div>
</table>
Javascript:
function editvalidation() {
var isDataValid = true;
var newCourseNoO = document.getElementById("newCourseNo");
var newCourseNameO = document.getElementById("newCourseName");
var newCourseDurationO = document.getElementById("newDuration");
var newCourseIdMsgO = document.getElementById("courseidAlert");
var newCourseNameMsgO = document.getElementById("coursenameAlert");
var newDurationMsgO = document.getElementById("durationAlert");
if (currentCourseO.value == ""){
$('#targetdiv').hide();
currentCourseMsgO.innerHTML = "Please Select a Course to edit from the Course Drop Down Menu";
newCourseIdMsgO.innerHTML = "";
newCourseNameMsgO.innerHTML = "";
newDurationMsgO.innerHTML = "";
isDataValid = false;
}else{
if (newCourseNoO.value == ""){
$('#targetdiv').hide();
newCourseIdMsgO.innerHTML = "Please fill in the Course ID in your Edit";
isDataValid = false;
}if (newCourseNameO.value == ""){
$('#targetdiv').hide();
newCourseNameMsgO.innerHTML = "Please fill in the Course Name in your Edit";
isDataValid = false;
}if (newCourseDurationO.value == ""){
$('#targetdiv').hide();
newDurationMsgO.innerHTML = "Please select a Course Duration in your Edit";
isDataValid = false;
}else{
newCourseIdMsgO.innerHTML = "";
newCourseNameMsgO.innerHTML = "";
newDurationMsgO.innerHTML = "";
}
return isDataValid;
}
}
我对上述验证有 2 个问题。
问题1:在相关表单功能下方不显示错误,在表单上方显示错误。例如,如果用户没有输入 courseid,则错误应该显示在 course id 文本输入下方。
问题2:
如果我将表单/表格留空,则会显示所有错误,但是如果我填写其中一个文本输入并重新提交,它仍然会显示所有错误,它应该删除相关错误,因为文本输入是不是空的。为什么即使没有错误,它仍然显示错误?
只有javascript答案,谢谢