var $sPriorityID = "select_priority";
var $sAreaID = "areas_for_priority";

function qbInitProjectideas(){
	var $oElem = document.getElementById($sPriorityID);
	if (!$oElem) return;
	$oElem.onchange = qbManageAreas;
	qbManageAreas();
}

function qbManageAreas($fp_oEvent) {
	var $oSelectElem = document.getElementById($sPriorityID);
	for($i=1;$i<=4;$i++){
		var $oElem = document.getElementById($sAreaID+$i);
		if (!$oElem) continue;
		if ($i != $oSelectElem.value){
			$oElem.style.display = "none";
			$aAreas = $oElem.getElementsByTagName("input");
			for($j=0;$j<$aAreas.length;$j++)
				$aAreas[$j].checked = false;
			}
		else $oElem.style.display = "block";
	}
}

window.onload=qbInitProjectideas;