$(document).ready(function(e){
	$('#year_filter').change(function(){
		var newLoc = '';
		
		search = search_val();
		var year_filter_loc = search.search(/year_filter/i);
		
		if(year_filter_loc < 0){
			search = search_val();
			search = (search == '?') ? search : search + '&';
			newLoc = search + 'year_filter=' + $('#year_filter').val();
		}else{
			search = search_val();
			var splitted = search.split(search.substr(year_filter_loc, 16));
			newLoc = splitted.join('year_filter=' + $('#year_filter').val());
		}
		
		window.location = newLoc;
	});
	$('#month_filter').change(function(){
		
		var newLoc = '';
		search = search_val();
		var month_filter_loc = search.search(/month_filter/i);
		if(month_filter_loc < 0){
			search = search_val();
			search = (search == '?') ? search : search + '&';
			newLoc = search + 'month_filter=' + $('#month_filter').val();
		}else{
			search = search_val();
			var splitted = search.split(search.substr(month_filter_loc, 15)); 
			newLoc = splitted.join('month_filter=' + $('#month_filter').val());
		}
		
		window.location = newLoc;
	});
});
function search_val(){
	var search = window.location.search;
	if(search == '') search = '?';
	return search;
}