var validBalloon="balloon2";

function IsNumeric(sText) {
	var ValidChars = "0123456789.";
	var char;
	var decimals = 0;

	for (i = 0, l=sText.length; i < l; i++) {
		char = sText.charAt(i);
		if (ValidChars.indexOf(char) == -1) {
			return false;
		}
		if ( char == '.' ) {
			decimals++;
		}
	}
	if ( decimals > 1 ) {
		return false;
	}
	return true;
}

// Function to calculate Periodic Payments.
function pmt() {
	// baloon value
	var fv = document.getElementById("conmsg_balloon1").value;
	// payment term
	var nper = document.getElementById("conmsg_term").value;
	// interest rate
	var rate = document.getElementById("conmsg_rate").value;
	// amount to be financed
	var pv = document.getElementById("conmsg_amount").value;
	// baloon percent
	var balper = document.getElementById("conmsg_balloon2").value;
	// baloon $
	var balpay = document.getElementById("conmsg_balloon1").value;

	// remove $ and , from the financed amount string, we want a float only
	pv = pv.replace(/[$]/g,"").replace(/,/g,"");
	// make sure the amount financed is not negative.
	if(pv != "" && IsNumeric(pv)) {
		if (pv < 0) {
			alert("The value of the amount to be financed (boat price) must not be less than $0");
			document.calculator.amount.focus();
			return false;
                 }
	} else {
		alert("The value of the amount financed (boat price) must be a valid number");
		document.calculator.amount.focus();
		return false;
	}
	document.getElementById("conmsg_amount").value = pv;
	//used by program
	pv = -pv;
   
	//make sure the balper field is only b/w 0 and 100 and no negatives.
	if(balper != "" && IsNumeric(balper)) {
		if ((balper < 0) || (balper > 100)) {
			alert("The value for the balloon percentage must be between 0 and 100");
			return false;
		} else {
			document.getElementById("conmsg_balloon1").value = (((-(pv*(balper/100))*100))/100).toFixed(2);
		}
	} else {
		alert("The value for the balloon percentage must be a valid number %");
	}

	//make sure that all money is positive not negative	 
	if (fv < 0) {
		alert("The value for the balloon payment must not be less than $0");
		return false;
	}

	if ((fv == 0) || (fv == "") || (!IsNumeric(fv)))  {
		fv = -(pv*balper/100);
	}
	fv = parseFloat(fv);
	nper = parseFloat(nper);
	pv = parseFloat(pv);
	rate = parseFloat(rate);

	rate = eval((rate)/(12 * 100));
	if ( rate == 0 ) {
		// interest rate is 0
		pmt_value = - (fv + pv)/nper;
	} else {
		x = Math.pow(1 + rate,nper);
		pmt_value = -((rate * (fv + x * pv))/(-1 + x));
	}
	pmt_value = conv_number(pmt_value,2);		
	document.getElementById("conmsg_repayment").value = pmt_value;
}
function conv_number(expr, decplaces) {
	// This function is from David Goodman's Javascript Bible.	
	var str = "" + Math.round(eval(expr) * Math.pow(10,decplaces));
	while (str.length <= decplaces) {
		str = "0" + str;
	}
	var decpoint = str.length - decplaces;
	return (str.substring(0,decpoint) + "." + str.substring(decpoint,str.length));
}
function reset() {
	document.getElementById("conmsg_amount").value = "";
	document.getElementById("conmsg_rate").selectedIndex = 0;
	document.getElementById("conmsg_term").selectedIndex = 4;
	document.getElementById("conmsg_balloon1").value = "0.00";
	document.getElementById("conmsg_balloon2").value = "0.00";
	//document.getElementById("consmg_monthly").value = "";
}
function update_balloon_type(elem) {
	update_balloon_values();
	validBalloon = elem.id;
}
function update_balloon_values() {
	// we update the opposite balloon figure from the 'valid' one
	if ( ! IsNumeric ( document.getElementById('conmsg_amount') ) ) {
		return;
	}
	if ( validBalloon == 'balloon' ) {
		if ( ! IsNumeric(document.getElementById("conmsg_balloon1").value) ) {
			return;
		}
		value = (document.getElementById("conmsg_balloon1").value * 100 / document.getElementById('conmsg_amount').value).toFixed(2);
		if ( value > 100 ) {
			alert("Balloon payment larger than total amount to finance, please lower the balloon amount");
			return;
		}
		document.getElementById('conmsg_balloon2').value = value;
	} else {
		if ( ! IsNumeric(document.getElementById("conmsg_balloon2").value) ) {
			return;
		}
		if ( document.getElementById("conmsg_balloon2").value > 100 ) {
			alert("Balloon payment larger than total amount to finance, please lower the balloon amount");
			return;
		}
		value = (document.getElementById("conmsg_balloon2").value * document.getElementById('conmsg_amount').value / 100).toFixed(2);
		document.getElementById('conmsg_balloon1').value = value;
	}
}
function update_values() {
	update_balloon_values();
	if ( document.getElementById('conmsg_amount').value != "" ) {
		pmt();
	}
}

// ---- disappearing/reappearing text in the signup and search text field ---------------------------------------

function focusName(element) {		if (element.value == " name...")	{ element.value = ""; }}
function blurName(element) {		if (element.value == "")			{ element.value = " name..."; } }
function focusFirstName(element) {		if (element.value == " first name...")	{ element.value = ""; }}
function blurFirstName(element) {		if (element.value == "")			{ element.value = " first name..."; } }
function focusYourName(element) {	if (element.value == " your name")	{ element.value = ""; } }
function blurYourName(element) { 	if (element.value == "")			{ element.value = " your name"; } }
function focusEmail(element) {		if (element.value == " email...")	{ element.value = ""; } }
function blurEmail(element) {		if (element.value == "")			{ element.value = " email..."; } }
function focusSurname(element) {		if (element.value == " surname...")	{ element.value = ""; } }
function blurSurname(element) {		if (element.value == "")			{ element.value = " surname..."; } }
function focusConfirmEmail(element) {		if (element.value == " confirm email...")	{ element.value = ""; } }
function blurConfirmEmail(element) {		if (element.value == "")			{ element.value = " confirm email..."; } }
function focusYourEmail(element) {	if (element.value == " your email")	{ element.value = ""; } }
function blurYourEmail(element) {	if (element.value == "")			{ element.value = " your email"; } }
function focusKeyword(element) {	if (element.value == " keyword...")	{ element.value = ""; } }
function blurKeyword(element) {		if (element.value == "")			{ element.value = " keyword..."; } }
function focusUsername(element) {	if (element.value == "username")	{ element.value = ""; } }
function blurUsername(element) {	if (element.value == "")			{ element.value = "username"; } }
function focusPassword(element) {	if (element.value == "password")	{ element.value = ""; } }
function blurPassword(element) {	if (element.value == "")			{ element.value = "password"; } }
function focusThis(element, text){ if (element.value == text)	{ element.value = ""; } }
function blurThis(element, text){ if (element.value == "")	{ element.value = text; }}
// ---- disappearing/reappearing text in the signup and search text field ---------------------------------------

function submit_calculator() {
	
	if(document.getElementById('conmsg_name') != null){
		if ( document.getElementById('conmsg_name').value == "") {
			alert("Your name please");
			document.getElementById('conmsg_name').focus();
			return false;
		}
	}
	
	if(document.getElementById('conmsg_phone') != null) {
		if ( document.getElementById('conmsg_phone').value != "" ) {
		
			var length = document.getElementById('conmsg_phone').value.length ;
			var phone = document.getElementById('conmsg_phone').value ;
			var validChars = "0123456789 ()" ;
			
			// tests to insure it is a valid phone number with no letters, "() -" are  accepted 
			for (var i=0; i<length; i++) { 
				Char = phone.charAt(i); 
				if (validChars.indexOf(Char) == -1) 
				{
				alert('you have typed '+(document.getElementById('conmsg_phone').value)+'\n" '+Char+' " is not an accepted input');
				
				document.getElementById('conmsg_phone').focus();
				
				return false;
				}
			}
			
			// validates length of phone number
			
			for(var x = 1; x<length; ++x){
			phone = phone.replace(' ','');   
			}
			
			for(var x = 1; x<length; ++x){
			phone = phone.replace('(','');   
			}
			
			for(var x = 1; x<length; ++x){
			phone = phone.replace(')','');   
			}
			
			for(var x = 1; x<length; ++x){
			phone = phone.replace('-','');   
			}
			if (phone.length < 10){
			
			alert('you have typed '+(document.getElementById('conmsg_phone').value)+'\nit appears to be incomplete?');
				
			document.getElementById('conmsg_phone').focus();
				
			return false;
			
			}
	
		}else{
			alert("Your phone number please");
		
			document.getElementById('conmsg_phone').focus();
				
			return false;
		}
	}

	if(document.getElementById('conmsg_email') != null) {
	
		if (document.getElementById('conmsg_email').value != "") {
		
			var length = document.getElementById('conmsg_email').value.length ;
			var dotIndex = document.getElementById('conmsg_email').value.lastIndexOf(".");
			var atIndex = document.getElementById('conmsg_email').value.indexOf("@");
			var emailT = document.getElementById('conmsg_email').value.slice(atIndex);
			var eTAtIndex = emailT.indexOf("@") ;
			var eTDotIndex = emailT.indexOf(".") ;		
			
			if (length-dotIndex < 3 || atIndex < 1 || dotIndex < 1 || eTDotIndex-eTAtIndex < 2){
			
			alert('We need a Valid formatted Email address please' );
			
			document.getElementById('conmsg_email').focus();
			return false;
			}
		}else{
			alert("your email please");
		
			document.getElementById('conmsg_email').focus();
				
			return false;
		}
	}
	
	if(document.getElementById('conmsg_amount') != null) {
		if ( document.getElementById('conmsg_amount').value == "" || (! IsNumeric(document.getElementById('conmsg_amount').value)) ) {
			alert("The value of the amount financed (price) must be a valid number");
			document.getElementById('conmsg_amount').focus();
			return false;
		}
	}
	
	if(document.getElementById('conmsg_postcode') != null) {
		if ( document.getElementById('conmsg_postcode').value == "" ) {
			alert("Your postcode please");
			document.getElementById('conmsg_postcode').focus();
			return false;
		}
	}
	
   /* if ( document.getElementById('balloon').value == "" || IsNumeric(document.getElementById('balloon').value) == false ) {
		alert("The value of the final payment (balloon) must be a valid number");
		document.getElementById('balloon').focus();
		return false;
	}
	
		if ( document.getElementById('balloon2').value == "" || IsNumeric(document.getElementById('balloon2').value) == false ) {
		alert("The value of the final payment (percentage) must be a valid number");
		document.getElementById('balloon2').focus();
		return false;
	}
	*/
    
	update_values(); 
	
    $.fn.popupWindow ({ 
        windowURL:'/terms-and-conditions.php', 
        windowName:'Terms And Conditions' ,
        height:500, 
        width:720, 
        centerBrowser:1 
    });
    
	///document.forms.calculator.submit();
}