/*
* 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;
var jQFOptIsErr=false;

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


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),unescape(eval("n."+value)));
            if(i==selected)option.selected=true;
            select.options.add(option);
        });
    }
}
})(jQuery);



/*
* 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
*/

(function($){
jQuery.fn.CascadingSelect = function(target,url,options,endfn){
    $.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];
        target.FillOptions(newurl,options);
        if(typeof endfn =="function") endfn();
    });
}

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