function check_uncheck(id)
{
	var el = document.getElementById("filter_"+id);
	if(!el)
		return;
	
	if(el.checked)
		el.checked = false;
	else
		el.checked = true;
		
	filter_send();
}

function check_uncheck_g(id)
{
	var gel = document.getElementById("filter_"+id+"_grost");
	if(!gel)
		return;
	
	if(gel.checked)
		gel.checked = false;
	else
		gel.checked = true;
		
	filter_send_g(id);
}

function filter_select_q(sel)
{
	var ef = document.getElementById("extra_filter");
	ef.value = sel.options[sel.selectedIndex].value;
	
	filter_send();
}

function filter_send()
{
	var form = document.getElementById("form_filter");
	if(!form)
		return;
	
	form.submit();
}

function filter_send_g(id)
{
	var el = document.getElementById("filter_"+id);
	var gel = document.getElementById("filter_"+id+"_grost");
	if(!(gel && el))
		return;
	
	if(gel.checked)
		el.value = id;
	else
		el.value = "";
		
	filter_send();
}