/* rvb1.js */

rb = 'rentbuydata';
numDays = 60;  /* days until cookie expires (eg. 183 days = 6 months) */

function doSum(a){ 
	a.value = check(a.value);
}

function check(a) {
	var b = "";
   	for(i = 0; i <= a.length; i++){
		var u = a.charAt(i);
      	if((u >= "0" && u <= "9") || u == "." ){ 
   			var b = b + u;
		}
   	}
	return b;
}

function checkNumber(quest,input, min, max, msg){
    var str = input.value;
    for (var i = 0; i < str.length; i++) {
        var ch = str.substring(i, i + 1)
        if ((ch < "0" || "9" < ch) && ch != '.') {
            alert(msg);
            return false;
        }
    }
    if(input.value != "") {
    	var num = 0 + str
    	if (num < min || max < num) {
    		var sendn = msg + ":";
    		var sendq = "You have entered " + input.value + ". Please enter a number between " + min + " and " + max + ".";
  			fixpro(sendn,sendq);
        	return false;
    	}
    	input.value = str;
    	return true;
    }
}

function computeField(quest,input,min,max,msage){
// calls upon the function which calculates the results of the entered data.  
// For example - Mortgage Payment, GDS and TDS ratios, and Loan to 
// Value. This function is executed everytime a value is changed in a field.
	doSum(input);
	if (input.value != null && input.value.length != 0)
	input.value = "" + eval(input.value);
	checkNumber(quest,input,min,max,msage); 
}        

function roundPen(n){
	if(n > 0){
		pennies = n * 100;
		pennies = Math.round(pennies);
		strPennies = "" + pennies;
		len = strPennies.length;
		return strPennies.substring(0, len - 2) + "." + strPennies.substring(len -2, len);
	} else { 
		return 0;
	}
}

function calcMax(){
	var error = 0;
	if((document.rentcalc.monpay.value == null || document.rentcalc.monpay.value.length == 0) || (document.rentcalc.monpay.value < 200 || document.rentcalc.monpay.value > 10000)){
		error = 1;
		fixpro('Monthly Payment:','Please enter a number between 200 and 10000.');
	}
	if (error == 0) {
		if ((document.rentcalc.downp.value == null || document.rentcalc.downp.value.length == 0) || (document.rentcalc.downp.value < 2000 || document.rentcalc.downp.value > 1000000)){
			error = 1;
			fixpro('Downpayment:','Please enter a number between 2000 and 1000000.');
		}
	}
	if (error == 0) {
		if ((document.rentcalc.protax.value == null || document.rentcalc.protax.value.length == 0) || (document.rentcalc.protax.value < 300 || document.rentcalc.protax.value > 10000)){
			var error = 1;
			fixpro('Property Taxes:','Please enter a number between 300 and 10000.');
		}
	}
	if (error == 0) {
		if ((document.rentcalc.rate.value == null || document.rentcalc.rate.value.length == 0) || (document.rentcalc.rate.value < 2  || document.rentcalc.rate.value > 25)){
			var error = 1;
			fixpro('Interest Rate:','Please enter a number between 2 and 25.');
		}
	}
	if (error == 0) {
		if(document.rentcalc.incr.selectedIndex == 0){
			var error = 1;
			fixpro('Home Value Increase:','You have not answered this question, click on the \'Select\' button to choose your option.');
		}
	}
	if (error == 0) {
		if ((document.rentcalc.rent.value < 0  || document.rentcalc.rent.value.length == 0) || (document.rentcalc.rent.value < 0  || document.rentcalc.rent.value > 5000)){
			var error = 1;
			fixpro('Monthly Rent:','Please enter a number between 0 and 5000.');
		}
	}
	if (error == 0) {
		if(document.rentcalc.compare.selectedIndex == 0){
			var error = 1;
			fixpro('Years of Comparison:','You have not answered this question, click on the \'Select\' button to choose your option.');
		}
	}
	if (error == 0) {     
		var RATE = document.rentcalc.rate.value / 100;
		var downp = document.rentcalc.downp.value * 1.0;
		var tax = document.rentcalc.protax.value;
		var incr = document.rentcalc.incr[document.rentcalc.incr.selectedIndex].value;
		var monpay = document.rentcalc.monpay.value;
		var rent = document.rentcalc.rent.value;
		var compare = document.rentcalc.compare[document.rentcalc.compare.selectedIndex].value;
		var expire = new Date ();
		expire.setTime (expire.getTime() + (numDays * 24 * 3600000));/* 2 months */
		var rbData = " ";
		var rbData = rbData + '`' + RATE + '`' + downp + '`' + tax + '`' + incr + '`' + monpay + '`' + rent + '`' + compare;
		document.cookie = rb + "=" + escape(rbData) +"; expires=" + expire.toGMTString()+"; path=/" ;
		if(versTest() == true || nineTest() == true){       
        	sumW = window.open('30021_calculators.html','Results','toolbar=no,location=no,directories=no,status=no,menubar=yes,scrollbars=yes,resizable=yes,width=550,height=300');
        	if(navigator.appName.substring(0,8) == "Netscape"){
                sumW.focus();
        	}
		} else{
			location.href='30021_calculators.html';
		}
	}
}

function winopen(name){
	var linkit = "help/" + name;
	if(versTest() == true || nineTest() == true){       
		qc = window.open(linkit,'helpscreen','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=250,height=180');
		if(navigator.appName.substring(0,8) == "Netscape"){
			qc.focus();
		}
	} else {
		location.href = linkit;
	}
}
 
function StringArray(n){
	this.length = n;
	for (var i = 1; i <= n; i++)
	this[i] = '' 
	return this
}

function versTest(){
	var one = '';
	var two = '';
	if((navigator.appName.substring(0,8) == "Netscape" && (navigator.appVersion.substring(0,3) == "3.0" ||  navigator.appVersion.substring(0,3) == "4.0"))){
		var one = 'true';
	}
	if((navigator.appName.substring(0,9) == "Microsoft" && navigator.appVersion.substring(0,3) == "3.0" && navigator.appVersion.indexOf("Macintosh") >= 0)){
		var two = 'true';
	}
	if(one == 'true' || two == 'true' || (navigator.appName.substring(0,9) == "Microsoft" && navigator.appVersion.indexOf("MSIE 3.0") >= 0 && navigator.appVersion.indexOf("Windows 3.1") >= 0)){
		return true;
	} else {
		return false;
	}
}

/* tests if version is msie 3.0 for mac */

function msTest(){
	if(navigator.appName.substring(0,9) == "Microsoft" && (navigator.appVersion.substring(0,3) == "3.0" && navigator.appVersion.indexOf("Macintosh")>=0)){
		return true;
	} else {
		return false;
	}
}

function nineTest(){
	if(navigator.appName.substring(0,9) == "Microsoft" && (navigator.appVersion.substring(0,3) == "3.0" || navigator.appVersion.indexOf("MSIE 3.0") >= 0) && (navigator.appVersion.indexOf("Macintosh") == -1 || navigator.appVersion.indexOf("Windows 3.1") == -1)) {
		return true;
	} else {
		return false;
	}
}

function StringArray(n){
	this.length = n;
	for (var i = 1; i <= n; i++)
	this[i] = '' 
	return this
}

function browTest(){
	if((navigator.appVersion.substring(0,3) == 3.0 || navigator.appVersion.substring(0,3) == 4.0)&& navigator.appName.substring(0,8)=="Netscape"){
        return true;
	} else{
		return false;
	}
}

function fixpro(n,q){
	if(versTest() == true){
		if(msTest() == true){
			var winNam = '';
		} else{
			var slash = location.href.lastIndexOf("index.html")+1;
			var filNam = location.href.substring(0,slash);
			var winNam = filNam + 'empty.asp';
		}
		fix = window.open(winNam,'FIX','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=300,height=100');
		if(navigator.appName.substring(0,8) == "Netscape"){
			fix.focus();
		}
		fix.document.write('<html>\n<head>\n<title>Calculators</title>');
		fix.document.write('</head>\n<body bgcolor="#ffffff"><form name="fixer">');
		fix.document.write('' + n + '<p>' + q + '<p>');
		fix.document.write('<center><input type="button" value="OK" onclick="self.close()">');
		fix.document.write('</center></form>\n</body>\n</html>');
		fix.document.close();
	} else{
		alert(n + '\n' + q)
	}
}