(function ($) {
    $.fn.selectChain = function (options) {
        var defaults = {
            key: "id",
            value: "label",
			loadval: "loadval"
        };
        
        var settings = $.extend({}, defaults, options);
        
        if (!(settings.target instanceof $)) settings.target = $(settings.target);
        
        return this.each(function () {
            var $$ = $(this);
            
            $$.change(function () {
                var data = null;
                if (typeof settings.data == 'string') {
                    data = settings.data + '&' + this.name + '=' + $$.val();
                } else if (typeof settings.data == 'object') {
                    data = settings.data;
                    data[this.name] = $$.val();
                }
                //alert("test"+document.getElementById.('categorySelect').selectedIndex);
                settings.target.empty();
                
                $.ajax({
                    url: settings.url,
                    data: data,
                    type: (settings.type || 'get'),
                    dataType: 'json',
                    success: function (j) {
                        var options = [], i = 0, o = null;
                        
                        for (i = 0; i < j.length; i++) {
                            // required to get around IE bug (http://support.microsoft.com/?scid=kb%3Ben-us%3B276228)
                            o = document.createElement("OPTION");
                            o.value = typeof j[i] == 'object' ? j[i][settings.key] : j[i];
                            o.text = typeof j[i] == 'object' ? j[i][settings.value] : j[i];
							if(typeof j[i] == 'object') {
								if(j[i][settings.loadval]>0 && j[i][settings.loadval]==j[i][settings.key]) o.selected = true;
								//alert("key:"+j[i][settings.key]+" load:"+j[i][settings.loadval]);
							}
                            settings.target.get(0).options[i] = o;
                        }
						//alert("test"+document.getElementById.('categorySelect').selectedIndex);
						// hand control back to browser for a moment
						setTimeout(function () {
							//document.getElementById.('catTree').innerHTML=document.getElementById.('categorySelect').selectedIndex;
							settings.target
											.find('option:first')
											//.attr('selected', 'selected')
											.parent('select')
											.trigger('change');
											//updateSelectedText();
						}, 0);
                    
						
						
						},
						error: function (xhr, desc, er) {
							// add whatever debug you want here.
							alert("an error occurred"+xhr+desc+er);
						}
                });
            });
        });
    };
})(jQuery);