function submitReqDate(pageUrl)
{
    var date_str = "";
    //year
    var sel_el=document.getElementById("sel_year")
    date_str = sel_el.options[sel_el.selectedIndex].value + "-";
    
    //month
    sel_el=document.getElementById("sel_month")
    date_str += sel_el.options[sel_el.selectedIndex].value + "-";
    
    //day
    sel_el=document.getElementById("sel_day")
    date_str += sel_el.options[sel_el.selectedIndex].value;
    
    document.location = pageUrl + date_str;
}