var UPGRADE_JS = 3;

function updateextralistings( isonsubmit )
	{
	if ( document.renewform.M_is_loggedin.value ==1)
		{
		var extratot = parseFloat(document.renewform.M_extralistings.selectedIndex*20);
		if ( document.renewform.M_extralistings.selectedIndex == 0 )
			{
			if ( isonsubmit )
				{
				alert('Please select how many extra listings you wish to purchase');
				}
			document.renewform.amount.value=0;
			return false;
			}
		else
			{
			document.renewform.amount.value=makeprice(extratot);
			document.renewform.desc.value = document.renewform.M_extralistings.options[ document.renewform.M_extralistings.selectedIndex ].text + " extra bold listings";
			return true;
			}
		}
	}
function updatetotal() 
	{
	if ( document.renewform.M_is_loggedin.value ==1)
		{
		var discountpc= 0;
		var discount = 0;
		var extratot = 0;
		var subtot =0;
		var grandtotal =0;
		var prodperiod = "";
		
		var extra_listings_price = 0; 
		
		var payment_method = 'worldpay';
		var secondstep_required = false;
		
		for (var i=0; i<document.renewform.payment_method.length; i++)
			{
			if ( document.renewform.payment_method[i].checked )
				{
				payment_method = document.renewform.payment_method[i].value;
				}
			}

		for (var i=0; i<document.renewform.M_prodprice.length; i++)
			{
			if ( document.renewform.M_prodprice[i].checked )
				{
				subtot = parseFloat(document.renewform.M_prodprice[i].value);
				}
			}
		if ( subtot >= 7 && subtot <= 10 )
			{
			prodperiod = "7 days";
			//secondstep_required = true;
			}
		//else if ( subtot == 9  )
		//	{
		//	prodperiod = "7 days";
		//	secondstep_required = true;
		//	}
		else if ( subtot >= 11 && subtot <= 15 )
			{
			prodperiod = "14 days";
			//secondstep_required = true;
			}
		//else if ( subtot == 15  )
		//	{
		//	prodperiod = "14 days";
		//	secondstep_required = true;
		//	}
		else if ( subtot >= 18 && subtot <= 26)
			{
			prodperiod = "28 days";
			extra_listings_price = 11;
			//secondstep_required = true;
			if ( subtot == 22 )
				{
				// london so upselling photo ad
				// secondstep_required = true;
				}
			}
		else if ( subtot == 29 )
			{
			prodperiod = "3 months";
			extra_listings_price = 14;
			}
		else if ( subtot == 32 )
			{
			prodperiod = "Unlimited time UNTIL LET";
			secondstep_required = true;
			}
		else if ( subtot >= 39 && subtot < 59)
			{
			prodperiod = "6 months";
			extra_listings_price = 19;
			}
		else if ( subtot >= 59 )
			{
			prodperiod = "1 year";
			extra_listings_price = 29;
			}
			
		if ( document.renewform.proupgrade.value ==1)
			{
			if ( prodperiod == "7 days" || prodperiod == "14 days" )
				{//only available for 28day + options
				if ( document.renewform.M_extralistings.selectedIndex!=0 )
					{
					alert("Extra listings only available for the 28 day, 6 mth and 1 year options");
					document.renewform.M_extralistings.selectedIndex=0;
					}
				document.renewform.M_extralistings.disabled=true;
				}
			else
				{
				document.renewform.M_extralistings.disabled=false;
				}
			// is pro upgrade form so look for extra listings too!
			extratot = parseFloat( document.renewform.M_extralistings.options[ document.renewform.M_extralistings.selectedIndex ].text * extra_listings_price);
			//alert( document.renewform.M_extralistings.selectedIndex );
			//alert( document.renewform.M_extralistings.selectedIndex*15);
			document.renewform.extralistingscost.value = extratot;
			}
		subtot = subtot+extratot;
		// discount
		discountpc = document.renewform.M_discount.value;
		grandtotal = subtot;
		if ( discountpc )
			{
			discount = discountpc/100;
			grandtotal = subtot-(subtot*discount);
			}
		var refundamount = document.renewform.M_refund.value;
		if ( refundamount )
			{
			grandtotal = grandtotal - refundamount;
			}
		document.renewform.amount.value=makeprice(grandtotal);
		document.renewform.desc.value = document.renewform.base_desc.value + " for "+ prodperiod;
		if ( document.renewform.proupgrade.value ==1)
			{
			if ( document.renewform.M_extralistings.selectedIndex!=0 )
				{
				document.renewform.desc.value += " plus "+document.renewform.M_extralistings.options[ document.renewform.M_extralistings.selectedIndex ].text +" extra listings";
				}
			}
		
		// payment method and form action
		if ( secondstep_required )
			{
			document.renewform.action='/flatshare/get_upgrade_step2.pl';
			}
		else
			{
			if ( payment_method == "paypal" )
				{
				document.renewform.action='/flatshare/paypal.pl';
				}
			else
				{
				document.renewform.action='https://secure.worldpay.com/wcc/purchase';
				}
			}

		}

	}