JAvascript验证功能不太正常
下面我有一个表和一个javascript验证函数: HTML表格:JAvascript验证功能不太正常,javascript,Javascript,下面我有一个表和一个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> <
<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>
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;
}
}
我对上述验证有两个问题
问题1:它没有在相关表单功能下方显示错误,错误显示在表单上方。例如,如果用户没有输入courseid,则错误应该显示在课程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,但如果我填写其中一个文本输入(例如)并重新提交,则仍会显示所有错误,应删除相关错误,因为文本输入不是空的。为什么即使没有错误,它仍然显示错误
只有javascript答案,谢谢
您的html无效。不能将元素直接放在表中(因此浏览器可能会将它们移到表外,因此问题1)。您可以使用初始隐藏的,而不是。。。关于问题2,移动三个
.innerHTML=“”代码>行在else
之外,在第一个if
之前。