我已经搜索了一段时间,这是我想出的,但是它不起作用:
<form action="Subscription.php" method="post">
<label>field1<a style="color:red">*</a></label>
<input type="text" id="field1" name="field1" pattern="^[A-Za-z -]+$" required>
<input type="checkbox" name="checkbox1" onclick="showMe('more'); togglerequirement();">Do you want more?
<div id="more" style="display:none">
<label>field2<a style="color:red">*</a></label>
<input type="text" id="field2" name="field2" pattern="^[A-Za-z -]+$">
</div>
<input type="submit" value="Invia richiesta di registrazione" class="btn" </form>
<script type="text/javascript">
function showMe (box) {
var chboxs = document.getElementsByName("more");
var vis = "none";
if(chboxs[0].checked) {
vis = "block";
}
document.getElementById(box).style.display = vis;
}
function togglerequirement(){
var checkbox = document.getElementsByName("more");
var field2= document.getElementsByid("field2");
if(checkbox[0].checked){
field2.setAttribute("required", "");
}else{
field2.removeAttribute("required");
}
}
</script>
在您说任何我已经尝试过的fiedl2.required之前;而且无论哪种方式都行不通。
我该怎么办?
答案 0 :(得分:0)
您正试图找到一个名为“更多”的复选框,但其名称为“ =“ checkbox1”:
<input type="checkbox" name="checkbox1" onclick="showMe('more'); togglerequirement();">
它可以正常工作,但是它将第二个字段在显示时更改为必填字段,而在隐藏时将其更改为不需要字段。因此您看不到任何效果。
如果我完全了解您,请尝试以下操作:
<form action="Subscription.php" method="post">
<label>field1<a style="color:red">*</a></label>
<input type="text" id="field1" name="field1" pattern="^[A-Za-z -]+$" required>
<input type="checkbox" name="more" onclick="showMe('more'); togglerequirement();">Do you want more?
<div id="more" style="display:none">
<label>field2<a style="color:red">*</a></label>
<input type="text" id="field2" name="field2" pattern="^[A-Za-z -]+$">
</div>
<input type="submit" value="Invia richiesta di registrazione" class="btn" </form>
<script type="text/javascript">
function showMe (box) {
var chboxs = document.getElementsByName("more");
var vis = "none";
if(chboxs[0].checked) {
vis = "block";
}
document.getElementById(box).style.display = vis;
}
function togglerequirement(){
var checkbox = document.getElementsByName("more");
var field2 = document.getElementById("field2");
if(checkbox[0].checked){
field2.setAttribute("required", "");
}else{
field2.removeAttribute("required");
}
}
</script>