/*
* jQuery CascadingSelect AddOption
*
* Author: luq885
* http://blog.csdn.net/luq885 (chinese) 
*
* Licensed like jQuery, see http://docs.jquery.com/License
*
* 作者：天天无用
* blog: http://blog.csdn.net/luq885
*/


jQuery.fn.CascadingSelect = function(target, url, options, endfn) {
    try {
        $.ajaxSetup({ async: false });
        if (target[0].tagName != "SELECT") throw "target must be SELECT";
        if (url.length == 0) throw "request is required";
        if (options.parameter == undefined) throw "parameter is required";

        this.change(function() {
            var newurl = "";

            urlstr = url.split("?");
            newurl = urlstr[0] + "?" + options.parameter + "=" + $(this).val() + "&" + urlstr[1];
            if (target.FillOptions(newurl, options) == "no datas") {
                state = "no datas";
            }
            if (typeof endfn == "function") endfn();
        });
    }
    catch (Error) { }
}

jQuery.fn.AddOption = function(text, value, selected, index) {
    try {
        option = new Option(text, value);
        this[0].options.add(option, index);
        this[0].options[index].selected = selected;
    }
    catch (Error)
	{ }
}

jQuery.fn.SetOption = function(selectValue) {
    var selectIndex = 0;
    for (var i = 0; i < this[0].options.length; i++) {
        if (this[0].options[i].value == selectValue) {
            this[0].options[i].selected = true;
        }

    }

}