I'm trying to create a mortgage payment calculator in Javascript and am having problems. My algorithm seems correct but it's not giving the right results. Im using this code:
function do_calc_payment(){var term = document.calc_payment.term.value;var rate = document.calc_payment.rate.value;var amount = document.calc_payment.amount.value;var j = rate / (12*100);var m = term * 12;var payment = amount * ( j / (1 - (1 + j) ^ -m))var result = "$"+Math.round((payment)*1000)/1000;if(isNaN(payment)){document.calc_payment.rate.value="";document.calc_payment.amount.value="";result="Not a Number";}if(payment.length>=15){result="Max Characters";}document.getElementById('new_payment').innerHTML = result;}
Does anybody know of an algorithm to calculate mortgage payments? e.g.
Amount: 100,000 Interest Rate: 4.5% Term: 25 Years
Monthly Payments: x
I've looked at other js scripts to do this but it seems alot more involved then I thought, and because they use non descriptive variable names I can't work any of them out..
i want the code below to display the total loan repayment amount instead of the monthly payment payment = principle * monthly interest/(1 - (1/(1+MonthlyInterest)*Months)) , eg if if l0an is 20$ payment is in 4 months, intrest rate is 15% display = amount to be repaid.
Where could I find a mortgage calculator script I could place on my website? I found a really cool one at www.dave.imarc.net/php free to use but I have a hard time understanding how to install it. I really don't even know what php is.
Could someone maybe guide me out of this programming lingo darkness?
I am trying to create a monthly mortgage calculator, I have been able to make it show prompts for Amount of loan; Interest rate; and Term of loan (in months), but it will not display the results. Below is the code I have utilized to get this far.
I've been trying to write a Javascript Mortgage Calculator for the past day and I believe I've got the structure right, although for some reason my functions must not be operating correctly or are not being called correctly. I'm almost afraid to say that it could be an error in the functions usage within the while loop. This Mortgage Calculator uses the principle of "bisection" to guess at the monthly payment necessary to fulfill the standards of the mortgage in question. This means that the loop is used to consistently halve the value of a guess until the correct monthly payment is guessed. Here is the code:
<script type=text/javascript> function calcMortgage (amountText, yearsText, interestText) { // constant definitions // variable declaration var amount = Number(amountText); var years = Number(yearsText); [Code]...
I have a mortgage calc that is adding an extra decimal place to my interest rate. To see this in action go to: [URL] Change the interest rate to 7.5 Click Calculate Payment Click Create Amortization Chart On the following screen you'll see a recap of your data and the interest rate will now say 7.55. Same thing happens if you enter 6.2. Next screen shows 6.22/. I've attached the html and js files in a zip.
I want to add onto my ebay auction a calculation which would show the unit price of a box of 5 electrical sockets.
So say it is currently on auction at £5.62 and I charge £1.99 Postage & packing thats a total of £7.61 with a unit price of £1.52. Then £1.52 is the figure I want to output and show on screen.
I'm just starting out in JS and would like to know how to solve this. I have an HTML form with 3 checkboxes, like a would-be order form. For example, on checkbox 1, the product is a toy car that costs $5.00, second box is a cigar cutter for $50, etc. I to have a button that when clicked, enters the total price (no taxes or subtotals) into a textbox field below in the same page.
I believe that this has been answered somewhere but I cannot find it. I have 51 textboxes on page. In 50 I can enter value. 51st should tell me what is average of entered numbers.
As user types I want script to iterate trough form count and sum non-empty fields and than divides this two numbers.I need to sum values from fields that have value (not emty fields) and to divide this number by number of non empty fields. This should occur on every change in any of those 50 textboxes so to have live preview of average.
I'm really new to JS and I don't know even how to sum these numbers.
In the second page he need to choose the time he want for his appointment (the time is in GMT+3 -> my local time). in this page the script also get the time zone and the date that he choose in the previous page (using POST - PHP). the date saved in variable. I used unix time (MKTIME function) I want that every time my visitor choose time (from drop-down box) a new cell/DIV will appear with his local time.for example - when he choose date: 10 May 2010, time zone: Austrlia - East Coast (+8 Hours) and time 22:00, New DIV will appear with the date "11 May 2010, 03:00AM" (there are 5 hours different).what is the JS what caculate and show the visitor local time?(I have, in PHP, only his time zone and the date that he coose in the first page)
I'm working on creating a custom calculator to determine the amount of money / credits users may earn from referrals. I've tested onChange, and it will work only when I have changed to a new field or clicked off that field. How do I make this calculate live?
So if the current value is 5 and I change it to 6, it will automatically recalculate the new value.
You can see what I'm working on here:
[URL]
Note: The one I'm testing is the 1st Level field. For now i'm just having it display the date.
I am making what I call a PM (Preventive Maintenance) Kit list. My users will use this list to generate a printable sheet to tell me what they used out of there kit. The list includes pricing per part and I would like the list to calculate the costing as they enter each item. So a total per line and an overall total cost.
I have included a snap shot of the page and below is the code. I can do this sort of thing on a small scale with just adding two lines but I am not sure how to modify it to handle this scale. You can see the script towards the bottom of the page. That is my lame attempt to make the per line costing happen but NOTHING happens.
<?php require "../config/bpts_config.php"; // Start the session //session_start(); ?> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN"> <html> [Code]...
This is my coding that I try but I still cannot get the function to calculate cgpa. <script language="Javascript" type="text/javascript"> /*Gred*/ function DisplayGred (GredPair) { var Gred = GredPair.split('|'); var jam_kredit = document.getElementById('jam_kredit').value; (user input pay amount student pay for course) document.getElementById('pointer').value = Gred[1]; (display course fee when item is selected) } function CalculateCGPA () .....
This is the interface look alike, the code subject, subject name and credit hours are retrive from the database, so how to calculate it? </p> <form id="form1" name="form1" method="post" action=""> <table width="552" height="82" border="0" class="tborder"> <tr bgcolor="#006699" class="text2"> <td width="17" bgcolor="#000099"><div align="center" class="style3"><strong><font size="2">Bil</font></strong></div></td> .....
I want to have 1 option box with values 10 100 1000 10000 etc in it , then i want to be able to select eg 100 and underneath it will show 100x25 which would be 2,500 so i want 1 box that has values of ten , hundred , thousand etc and they multiply by 25 and show underneath .
I have 3 textbox controls on my web page that are numeric currency fields in which a user can enter a numeric value, either positive or negative into TB1 and TB2 (both of these fields go thru edit checks to make sure a numeric value is entered and then return a currency value ie; $2500.00). TB3 is calculated resulting in TB3 = TB1 (($6500)) - TB2 ($2500).
My problem is that if a user enters a negative value for TB1, it returns a "NaN" and the value in TB3 turns out to be the same value as in TB2. Essentialy the calulation ends up being 0 - 2500 = 2500 (see screenshot). I've attached 2 functions below.
Code: function cal_Overage_Shortage() { if (make2Number("TB_LowPoint") <= 0) { document.getElementById("TB_OverageShortage").value = GetValueTextbox("TB_LowPoint") + GetValueTextbox("TB_RequestedLowPoint");
Using this formula for parts per million, can somebody please show a SIMPLE example of how to calculate all formulas for ppm?i tried everything..like in kilograms, etc...anyway, the link:[URL]
automatically calculate a total. The script pulls a price, which is given from a database to a hidden form field. Then once the quantity is changed the bottom form field automatically updates the price. Here's my script if someone could possibly point out why this might not be working (or is my logic flawed.)
i have a problem with the arrays.i have entered all the relevant arrays to calculate a list of cheap quotations but when clicking on the submit button it doesnt do nothing.when clicking on the submit button i want it to bring up the list of quotations based on the data entered in the form..
