/**
 * Default loading implementation
 *
 * @category    HTML
 * @package    Ajax
 * @license    http://www.opensource.org/licenses/lgpl-license.php  LGPL
 * @copyright    2005 Joshua Eichorn
 * see Main.js for license Author details
 */
HTML_AJAX.Open = function(request) {
    var loading = document.getElementById('HTML_AJAX_LOADING');
    if (!loading) {
        loading = document.createElement('div');
        loading.id = 'HTML_AJAX_LOADING';
        loading.innerHTML = 'Loading...';
        
        loading.style.color     = '#fff';
        loading.style.position  = 'absolute';
        loading.style.top   = 0;
        loading.style.right     = 0;
        loading.style.backgroundColor = '#f00';
        loading.style.border        = '1px solid #f99';
        loading.style.width         = '80px';
        loading.style.padding       = '4px';
        loading.style.fontFamily    = 'Arial, Helvetica, sans';
        loading.count = 0;
    
        document.body.insertBefore(loading,document.body.firstChild);
    }
    else {
        if (loading.count == undefined) {
            loading.count = 0;
        }
    }
    loading.count++;
    if (request.isAsync) {
        request.loadingId = window.setTimeout(function() { loading.style.display = 'block'; },500);
    }
    else {
        loading.style.display = 'block';
    }
}
HTML_AJAX.Load = function(request) {
    if (request.loadingId) {
        window.clearTimeout(request.loadingId);
    }
    var loading = document.getElementById('HTML_AJAX_LOADING');
    loading.count--;

    if (loading.count == 0) {
        loading.style.display = 'none';
    }
}
