Parse XML in jQuery by passing an id

Question

I have 4 blocks of xml, that I want to parse whith jQuery making one ajax call. Now four blocks of xml are different from each other(But the structure is same). I am trying to parse this xml by passing an id to each of the xml block, But in my ajax call I am not able to retreive the id attribute as it is the first thing that I need to capture to pass to the ajax function.

I tried something like this:

XML is here:

       <dropdown>
            <test id="1">
            <optionheading>
                <heads>Heading 1</heads>
                            <value>
                                    <values images='images/1.gif'>Option1</values>
                                    <values images='images/2.gif'>Option2</values>
                                    <values images='images/3.gif'>Option3</values>
                            </value>
            </optionheading>
    .....................................

    ............................
    </test>
    <test id='2">
    <optionheading>
                <heads id="b">H..................
    ..................
    ............
    </test>
</dropdown>

I need to get id of test1, test2, et-al

Ajax is Here:

$("document").ready(function() {
                $.ajax({ 
                    type: "GET",
                    url:"dropdown.xml",
                    dataType: "xml",
                    success :function(xml) {
                        var select = $("#mySelect"); 
                        //I am getting id here
                        var id=$(xml).find('test').attr('id'); 

                        $(xml).find('test'+id).each(function() {
                            $(this).find('optionheading').each(function() {
                            var opthead = $(this).fin......................

Answer 1

If I've understood you well, the following should happen (output boldfaced):

• <test id="IDHERE"> should populate <select ID="IDHERE">
• <optionheading> should create an <optgroup> with a label as defined at <heads>
• Each <optgroup> is populated with <option> elements, according to the given <values> elements

The code below is the jQuery method to implement this idea, as requested.

Note: $('test', xml) is a shorthand for $(xml).find('test').
Note2: Since an ID must be unique, select#yourID is equal to #yourID.
Note3: The <values> tag at the XML is not necessary for this script.

success: function(xml){
    //Loop through each `<test>`
    $('test', xml).each(function(test_index){
        var id = $(this).attr('id'); //Get the ID of the `<test>`
        // Select <select> element with ID `ID` using the `select#ID` selector
        var select = $('select#' + id);
        $('optionheading', this).each(function() {
            $('values', this).each(function(){
                var $values = $(this);
                $('<option>')
                    .val($values.attr('images'))
                    .text($values.text())
                    .appendTo(optgroup);
            });
            $('<optgroup>')
                .attr('label', $('heads', this).text())
                .appendTo(select);
        });
    });
}

Possible HTML after executing:

<select id='1'>
    <optgroup label='Heading 1'>
        <option value='images/1.gif'>Option1</option>
        <option value='images/2.gif'>Option2</option>
        <option value='images/3.gif'>Option3</option>
    <optgroup>
    ....
</select>
<select id="2">
    ...