function fmtPrice(value)
   {
   result=""+Math.floor(value)+".";
   var cents=100*(value-Math.floor(value))+0.5;
   result += Math.floor(cents/10);
   result += Math.floor(cents%10);
   return result;
   }

function update()
{
   hrs_basic        = document.forms[0].hrs_basic.selectedIndex + 1;
   hrs_extra        = document.forms[0].hrs_extra.selectedIndex;
   alc_bub       	= document.forms[0].alc_bub.selectedIndex;
   alc_fre       	= document.forms[0].alc_fre.selectedIndex;
   passengers       = document.forms[0].passengers.selectedIndex;
   balloons         = document.forms[0].balloons.selectedIndex;
   ribbons       	= document.forms[0].ribbons.selectedIndex;
   return_journey   = document.forms[0].return_journey.selectedIndex;
   dispo_cams       = document.forms[0].dispo_cams.selectedIndex;
   limo_colour      = document.forms[0].limo_colour.selectedIndex;
   event_hire       = document.forms[0].event_hire.selectedIndex;
   day_of_week      = document.forms[0].day_of_week.selectedIndex;
   setup            = 1;



if(day_of_week=="0") {day_of_week = day_of_week - 0;} //monday
if(day_of_week=="1") {day_of_week = day_of_week - 1;} //tuesday
if(day_of_week=="2") {day_of_week = day_of_week - 2;} //wednesday
if(day_of_week=="3") {day_of_week = day_of_week - 3;} //thurs
if(day_of_week=="4") {day_of_week = day_of_week - 4 + 10;}  //fri
if(day_of_week=="5") {day_of_week = day_of_week - 5 + 25;}  //sat
if(day_of_week=="6") {day_of_week = day_of_week - 6;} //sun





//if(event_hire=="0") {event_hire = event_hire - 0;}// 1 hour
if(event_hire=="1") {event_hire = event_hire - 1;}// wedding
//if(event_hire=="2") {event_hire = event_hire + 199;}//PROM
if(event_hire=="3") {event_hire = event_hire - 3;}//bday adult
if(event_hire=="4") {event_hire = event_hire - 4;}//bday child
if(event_hire=="5") {event_hire = event_hire - 5;}//hen
if(event_hire=="6") {event_hire = event_hire - 6;}//stag
if(event_hire=="7") {event_hire = event_hire - 7;}//airport
if(event_hire=="8") {event_hire = event_hire - 8;}//other



   hirehours        = hrs_basic * 110;
   extrahours       = hrs_extra * 90;
   drinksbubbly     = alc_bub * 8;
   drinksalcfree    = alc_fre * 4;
   balloons         = balloons * 4;
   alc_frehours     = setup * 0;
   ribbons          = ribbons * 7;
   pax              = passengers * 100;
   returnjourney    = return_journey * 120;
   cams             = dispo_cams * 5;
   limo_colourhours = limo_colour * 0;
   day_of_weekhours = day_of_week;
   limo_colourcost  = 500 * limo_colour;
   
   event_hire       = event_hire * 1;

  
  



  totalcost1    = ((event_hire + day_of_weekhours + hirehours + extrahours + drinksbubbly + drinksalcfree + balloons + pax + ribbons + returnjourney + cams ) * 1) + ((alc_frehours) * 50);

  //totalcost1    = ((hirehours + extrahours + drinksbubbly + drinksalcfree + balloons + pax + ribbons + returnjourney + cams + day_of_week ) * 1) + ((alc_frehours) * 50);
  totalhours    = Math.round(hrs_basic + hrs_extra);


  costperhour1   = (totalcost1/totalhours);
   costperhour   = fmtPrice(costperhour1);
   totalcost     = fmtPrice(totalcost1);
   
if(event_hire=="2") {totalcost = totalcost * (passengers + 1) + 113 + (passengers * 53);}//PROM

   document.forms[0].totalcost.value   = totalcost;
   document.forms[0].totalhours.value  = totalhours + ' hour hire'; // text next to in box


		
		    if (limo_colour == 0) // White
		    {
			if (pax <= 8)
			{
				document.limopic.src="images/8w.jpg"
			}
			if (pax >= 9)
			{
				document.limopic.src="images/16w.jpg"
			}
		}
		if (limo_colour == 1) // Silver
		{
			if (pax <= 8)
			{
				document.limopic.src="images/8s.jpg"
			}
			if (pax >= 9)
			{
				document.limopic.src="images/16s.jpg"
			}
		}
		if (limo_colour == 2) // Black
		{
			if (pax <= 8)
			{
				document.limopic.src="images/8b.jpg"
			}
			if (pax >= 9)
			{
				document.limopic.src="images/16b.jpg"
			}
		}
				if (limo_colour == 3) // Pink
		{
			if (pax <= 8)
			{
				document.limopic.src="images/8p.jpg"
			}
			if (pax >= 9)
			{
				document.limopic.src="images/16p.jpg"
			}
		}
}