var active;
function showCriteria(id){
    if (id != active && active!=null){
        document.getElementById("criteria_" + active).style.display="none";   
    }
    el = document.getElementById("criteria_" + id);
    el.style.display = "block";

    active = id;
}

function hideCriteria(id) {
        document.getElementById("criteria_" + active).style.display="none";   
}

function showLocationSelect()
{
    tb_show("Kies een locatie", "#TB_inline?height=200&width=300&inlineId=myOnPageContent", null);
}

function selectLocatie(locatie)
{
	document.getElementById('locatie').value = locatie;
	document.getElementById('zoekForm').submit();
}