/*
* 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;

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;

	$.ajaxSetup({async:false});
	var datas;
	if(type == "xml")
	{
		$.get(url,function(xml){datas=xml;});
	}
	else
	{
		$.getJSON(url,function(json){datas=json;});
	}
	if(datas == undefined)
	{
		return;//alert("no datas");
	}
	this.each(function(){
		if(this.tagName == "SELECT")
		{
			var select = this;
			if(!keep)$(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),eval("n."+value));
			if(i==selected)option.selected=true;
			select.options.add(option);
		});
	}
}