//在URL中，排序條件的變量名

var filter_param_name = "filter";
var class_filter_param_name = "class_id";
var type_filter_param_name = "type";
var date_filter_param_name = "date";

var page_num_param_name = "pn";


//篩選
function filter(){
	var e = event.srcElement;
	var tmp = removeSearch("URL",page_num_param_name);  //因?yàn)樽儞Q了數(shù)據(jù)范圍，故頁數(shù)也要從新開始計(jì)算
	this.location.search = addSearch(tmp,filter_param_name,e.value);
}

//日期篩選
function date_filter(){
	var e = event.srcElement;
	var tmp = removeSearch("URL",page_num_param_name);  //因?yàn)樽儞Q了數(shù)據(jù)范圍，故頁數(shù)也要從新開始計(jì)算
	this.location.search = addSearch(tmp,date_filter_param_name,e.value);
}

//按分類過濾
function class_filter(){
	var e = event.srcElement;
	var tmp = removeSearch("URL",page_num_param_name);　//因?yàn)樽儞Q了數(shù)據(jù)范圍，故頁數(shù)也要從新開始計(jì)算
	this.location.search = addSearch(tmp,class_filter_param_name,e.value);
}


//按類型過濾
function type_filter(){
	var e = event.srcElement;
	var tmp = removeSearch("URL",page_num_param_name);　//因?yàn)樽儞Q了數(shù)據(jù)范圍，故頁數(shù)也要從新開始計(jì)算
	this.location.search = addSearch(tmp,type_filter_param_name,e.value);
}