Switching Dropdown List [duplicate] - php

Question

This question already has answers here:
Using Ajax, jQuery and PHP in two dropdown lists
(2 answers)
Closed 8 years ago.
I was making a dropdown switch. I mean when I choose an option of the first drop down the second will show specified message preset's in stead of the first.
**Dropdown one**
<select name="bantype">
<option value="user">User ban</option>
<option value="ip">IP ban</option>
<option value="system">System ban</option>
</select></br></br>
**Dropdown two**
<select name="reason">
<option value="Sexual harassment">Sexual harassment</option>
</select>
How can I make that when I select an option from the first dropdown that the option values of the second will switch?
Thank you for help

Answer 1

It's called hierselect, chained or related selects.
I like this jquery plugin: http://www.appelsiini.net/projects/chained

Answer 2

So you have predefined values for each dropdown value from first list
<select id="first">
<option value='ban' data-show="#optionsOne">Ban Ban</option>
<option value='banAll' data-show="#optionsTwo">Ban All</option>
</select>
And you have other (hidden) dropdown for each of your options:
<select id="optionsOne" class='drop'>...</select>
<select id="optionsTwo" class='drop'>...</select>
When #first changes values, show relative dropdown:
$('#first').change(function(){
$('.drop').hide(); // hide all dropdowns
id = $('option:selected', this).data('show'); // take relevant id
$(id).show(); // show that dropdown with above id
});

Answer 3

Call javascript function event onchange,
<select name="bantype" onchange="getoptions(this.value);">
<option value="user">User ban</option>
<option value="ip">IP ban</option>
<option value="system">System ban</option>
</select><br/><br/>
<select name="reason" id="reason"></select>
In your function, use following
getoptions(val) {
if(val == 'user') {
var your_options = '<option value="abc">Abc</option>';
jQuery('#reason').html(your_options);
jQuery('#reason').show(); // if second dropdown is hidden
}
}

Answer 4

If you have a fixed option on page load, then here is one way to achieve what you want.
Give a relation between first select and the second one, like this:
<select name="bantype">
<option value="user">User ban</option>
<option value="ip">IP ban</option>
<option value="system">System ban</option>
</select></br></br>
**Dropdown two**
<select name="reason">
<option class="user" value="a">a</option>
<option class="user" value="d">d</option>
<option class="ip" value="b">b</option>
<option class="system" value="c">c</option>
</select>
Use jQuery to show and hide the option, like this
$("select[name='reason'] option").each(function(){
$(this).hide();
});
$("select[name='bantype']").on("change", function(){
var selected = $(this).val();
$("select[name='reason'] option").each(function(){
if($(this).prop("class") != selected){
$(this).hide();
}else{
$(this).show();
}
});
});
Check out this DEMO..