CODEWITHSUNDEEP
javascriptjqueryhtmlforms
Michael Clarke
Michael Clarke

Reputation: 169

Javascript/Jquery Link change form dropdown

This may come off as confusing or simple i have no idea.

I have a picture, when you click on an element in the picture, i need the dropdown in the next div along to change. 

<a href="eastern#browse" class="areaselect" rel="region_7" id="eastern" title="Eastern England image">Eastern England</a>
<a href="western#browse" class="areaselect" rel="region_8" id="western" title="Western England image">Western England</a>

That is an example of the links, this is an example of the dropdown.

<select name='areapick' id='apick'>
    <option value='placea'>Placea</option>    
    <option value='placeb'>Placeb</option>    
    <option value='placec'>Placec</option>
    <option value='placed'>Placed</option>    
    <option value='placee'>Placee</option>
</select>

Before anything is clicked, I dont want the menu to appear, but when they click say Eastern England i want Place A & B to appear in the dropdown, if they select Western England I want Place C, D & E to appear.

I have tried using an onclick which i could do easily to get the select menu to appear, but i can't get it to filter and remove elements etc or show/hide the div. I am already using the latest Jquery min library on the page. Any help is appreciated.

Upvotes: 0

Views: 346

Answers (3)

Matanya
Matanya

Reputation: 6346

I'd give both the a tag and the corresponding option tags the same class. Then, onclick I'd display the relevant options:

<a href="eastern#browse" rel="region_7" class="eastern" title="Eastern England image">Eastern England</a>
<a href="western#browse" rel="region_8" class="western" title="Western England image">Western England</a>


<select name='areapick' id='apick'>
        <option value='placea' class="eastern">Placea</option>    
        <option value='placeb' class="eastern">Placeb</option>    
        <option value='placec' class="western">Placec</option>
        <option value='placed' class="western">Placed</option>    
        <option value='placee' class="western">Placee</option>
    </select>

JS:

$("a").click(function(){
this_class= $(this).attr("class");
$("#apick").find("option").hide(); // reset
$("#apick").find("." + this_class).show(); // show desired options
});

Upvotes: 0

nicolast
nicolast

Reputation: 732

here is the new html (with different classes for eastern and western) :

<select name='areapick' id='apick'>
        <option value='placea' class="eastern">Placea</option>    
        <option value='placeb' class="eastern">Placeb</option>    
        <option value='placec' class="western">Placec</option>
        <option value='placed' class="western">Placed</option>    
        <option value='placee' class="western">Placee</option>
    </select>

here is the javascript I would use:

   $(document).ready(function(){
        $('.areaselect').on('click', function(event){
            var id = $(this).attr('id')
            $('#apick option').not('.'+id).css('display','none');
            $('.'+id).css('display','inline').first().attr('selected','selected');
            event.preventDefault();
        });
    });

notice the "link" between <a> #id and <option> .class
(script not tested)

Upvotes: 2

Brune
Brune

Reputation: 1060

With the same structure you can try using the gt and lt selectors of jQuery.

$(document).ready(function(){
     $('.areaselect').on('click', function(){
         $('#apick').css('display','none');
         $('#apick option').css('display','inline');
         var title = $(this).attr('id');
         if(title.indexOf('eastern') != -1){
              $('#apick option:gt(1)').css('display','none');//Zero based index
         }
         else{
              $('#apick option:lt(2)').css('display','none');//Zero based index
         }
         $('#apick').css('display','inline-block');
     });
});

Upvotes: 0

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