/*
* jQuery FillOptions
*
* 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
*/

var text;
var value;
var type;
var selected;
var keep;
(function($) {
    $.fn.FillOptions = function(url, options) {
        //debugger;
        if (url.length == 0) throw "request is required";
        text = options.textfield || "text";
        value = options.valuefiled || "value";
        type = options.datatype.toLowerCase() || "json";
        if (type != "xml") type = "json";
        keep = options.keepold ? true : false;
        selected = options.selectedindex || 0;

        $.ajaxSetup({ async: false });
        var datas;
        if (type == "xml") {
            $.get(url, function(xml) { datas = xml; });
        }
        else {
            $.getJSON(url, function(json) { datas = json; });
        }
        if (datas == undefined) {
            //alert("no datas");
            return;
        }
        this.each(function() {
            if (this.tagName == "SELECT") {
                var select = this;
                if (!keep) $(select).html("");
                addOptions(select, datas);
            }
        });
    }
})(jQuery);

function addOptions(select,datas)
{        
    var options;
    var datas;
    if(type == "xml")
    {
        $(text,datas).each(function(i){            
            option = new Option($(this).text(),$($(value,datas)[i]).text());
            if(i==selected)option.selected=true;
            select.options.add(option);
        });
    }
    else
    {
        $.each(datas,function(i,n){
            option = new Option(eval("n."+text),eval("n."+value));
            if(i==selected)option.selected=true;
            select.options.add(option);
        });
    }
}