function addReq(){
		var currentReq = document.getElementById("extra_req");
		var currentReqNumber = parseInt(currentReq.value);
		currentReqNumber++;		
		
		var htmlForInsert = "<tr name=\"additionalRq_"+currentReqNumber+"\" id=\"additionalRq_"+currentReqNumber+"\">";
			htmlForInsert += "<td>";
			htmlForInsert += "<table border=\"0\" cellpadding=\"0\" cellspacing=\"2\"class=\"form\">";
			htmlForInsert += "<tr><strong>Request #"+currentReqNumber+"</strong><br><td></td><td></td></tr>";
			htmlForInsert += "<tr><td width='150'>Date</td><td><input name=\""+currentReqNumber+"_rsDate\" type=\"text\" size=\"30\"></td></tr>";
			htmlForInsert += "<tr><td width='150'>Position</td><td><input name=\""+currentReqNumber+"_rsPos\" type=\"text\" size=\"30\"></td></tr>";
			htmlForInsert += "<tr><td width='150'>Start time</td><td><input name=\""+currentReqNumber+"_rsSTime\" type=\"text\" size=\"30\"></td></tr>";
			htmlForInsert += "<tr><td width='150'>Finish time</td><td><input name=\""+currentReqNumber+"_rsFTime\" type=\"text\" size=\"30\"></td></tr>";
			htmlForInsert += "<tr><td width='150'>Ward</td><td><input name=\""+currentReqNumber+"_rsWard\" type=\"text\" size=\"30\"></td></tr>";
			htmlForInsert += "</table></td><td valign='bottom'><input id=\"subtractorRq_"+currentReqNumber+"\" name=\"subtractorRq_"+currentReqNumber+"\" type=\"button\" value=\"remove\" onclick=\"subtractReq()\"></td></tr>";
		
		//hide previous
		var toHide =  document.getElementById("subtractorRq_"+ (currentReqNumber - 1) );

		if (currentReqNumber > 1){
		Element.hide(toHide); }
		
		if (document.getElementById("additionalRq_"+currentReqNumber)){
			Element.show("additionalRq_"+currentReqNumber);
			Element.show("subtractorRq_"+currentReqNumber);
		}else {
		
		new Insertion.Before("submit_area_req", htmlForInsert);
		}
		
		currentReq.value = currentReqNumber;
	}
	
	function subtractReq(){
		var currentReq = document.getElementById("extra_req");
		var currentReqNumber = parseInt(currentReq.value);
		
		var toHide =  document.getElementById("subtractorRq_"+ (currentReqNumber) );
		Element.hide(toHide);
		
		if (currentReqNumber > 1 ){
		var toShow =  document.getElementById("subtractorRq_"+ (currentReqNumber - 1));
		Element.show(toShow);
		}
		
		var toKill =  document.getElementById("additionalRq_"+ (currentReqNumber));
		
		Element.hide(toKill);
		
		currentReqNumber--;
		if (currentReqNumber < 0) {currentReqNumber = 0;}
		
		currentReq.value = currentReqNumber;
	}