Chained Select with NO jQuery or Ajax

问题

I'm using XAMPP Lite - USB Version and found that the jQuery chained select boxes scripts don't work because they rely on AJAX which is not working on my XAMPP.

I have two Select boxes:

<label>Province</label>
<select name="province"> 
<option value="ontario">Ontario</option>
<option value="quebec">Quebec</option>
<option value="novascotia">Nova Scotia</option>
</select> 

<label>city</label>
<select name="city"> 
</select>

I need to be able to select a province and load different cities into the "city" name select. I have to do this without jQuery or Ajax. FYI It does not matter how long the javascript array variables have to be which will hold all the data. I just need someone to start me out with the script please.

回答1:

here's a quick sample, not optimized but does the job. as said, no jQuery and no AJAX. this one works in standards compliant browsers, you man need to tweak it for IE coz i have no IE to test on.

<label>Province</label>
<select id="province"> 
    <option value="p1">p1</option>
    <option value="p2">p2</option>
    <option value="p3">p3</option>
</select> 

<label>city</label>
    <select id="city"> 
</select> 


window.onload = (function() {

    var locations = {
        'p1': [
            'p1c1',
            'p1c2',
            'p1c3',
            ],
        'p2': [
            'p2c1',
            'p2c2',
            'p2c3',
            ],
        'p3': [
            'p3c1',
            'p3c2',
            'p3c3',
            ],
    };

    var provinces = document.getElementById('province');
    var cities = document.getElementById('city');

    provinces.addEventListener('change', function() {
        loadCities(this.value)
    }, false)


    var loadCities = (function loadCitiesFunc(key) {
        key = key || 'p1';
        var docFragment = document.createElement('select');
        for (var i = 0; i < locations[key].length; i++) {
            docFragment.appendChild(new Option(locations[key][i], locations[key][i]));
        }
        cities.innerHTML = docFragment.innerHTML;

        return loadCitiesFunc;
    }())

}());

来源：https://stackoverflow.com/questions/9917577/chained-select-with-no-jquery-or-ajax

标签

javascript

forms

select

chained