/*

* 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){

    $.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.fn.DelOption = function(index,text){               

	
	//this[0].options[index].selected = selected;
	//alert(this[0].options[this[0].selectedIndex].text);
	//this[0].remove(this[0].selectedIndex);
	this[0].options.remove(index);
	for(var i=0; i<this[0].options.length; i++){
		if(this[0].options[i].text == text){
			this[0].options.remove(i);
		}
	}
}