Incorporate Equation Into If Statement But Cannot Get It To Calculate Properly

Jun 2, 2009

I am new to using Javascript and have been trying to incorporate this equation into my if statement but cannot get it to calculate properly no matter which method I use. Here is the function as I have it worked out presently.

[Code]...

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How To Calculate Properly?

Feb 15, 2007

Can someone explain to me how I should code to calculate this?

I want to let the user add 4 different numbers (this is done) and then I want to + these numbers with each other.

This is the code I got: var medel = tal1+tal2+tal3+tal4 ;

Let say the user enters 1+2+3+4. Then the result should be 10. But I get this number as result: 1234

What have I done wrong?

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Nov 5, 2009

I can't seem to get the math function to calculate and display properly. Can anyone point me in the right direction.

Here is my code.

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Jun 7, 2011

With this code, it is not closing properly and I can not get it to work;.

"Its a radio button selection named "status" it has two values 0 and 1

<script type="text/javascript">

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Sep 1, 2011

I have a simple problem that I can't solve. I am trying to code a "More Info" button/link to display some more technical details of an item, if required or wanted. I haven't tried incorporating any code in to my web site yet, first I am trying to test how it can be done in a seperate file.

What I have right now is a table with two cells. In one cell is static text, in the other is a hyperlink. The onClick event calls a JS function called "more_info()" in which a global varible is altered to contain the value 1.

Directly after these two cells is more JS (this is before the table ends). The JS here is checking to see whether the value of the global variable has been changed. If the value is 1, display information. There is no "else" clause because I don't want information displayed unless the variable is equal to 1, so it is not required.

I think I know what the problem might be. The browser is reading the code in question before I ever click the link and has already been executed before the variable is changed. I know JS is object oriented so it will not sit there waiting for me to click the button before reading the logical statements.

[Code]...

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Mar 8, 2011

I'm trying to get my script below working. I've managed to get it to add fields dynamically but the remove function isn't right... and I can't think of a way round it. how can i incorporate a way for a limit on the number of fields that can be added?

<script type="text/javascript">
function addInput()
{
var x = document.getElementById("inputs");
x.innerHTML += "<input type="text" />";
}
function removeInput()
{
[Code].....

ah, i've just looked into the operators in more details and -= is just for numbers... so this won't work. i presume this is going to be the wrong method then.

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Avoid A Circular Equation In Js?

Oct 22, 2010

Im working on a project for my website where I would like to be able to change the value of a number by using js, and using getElemenById. For example:

"The taxi fare is $25"
"A hamburger is $4"

In the above sentence I would like to be able to change the value of 25 & 4 by giving them an id and then using js to increase (or decrease) their value, to allow for future inflation, without having to go back and manually change every number on lots of pages (if for example in 1 years time a hamburger is worth $6 then the info above is outdated and should be changed). If i could use a variable such as "RateUSD = 1" I could increase "1" to say "1.05" and it would increase the value of all id='USD' by 5% onload rather than having to manually change it by typing.

I so far have come up with the code below, but I think the reason it does not work is because I have created a circular equation - id='USD" is the start of the equation, but it is also in the equation itself, and it is the resulting answer, so effectively I have created "A = A*B", or in this case "25 = 25*1.1"

I chose "id" as I would like to be able to have different currencies (with different id, such as 'EURO','GBP', etc) on the same pages and on multiple pages. I'll crack it eventually, I would just like to know if I'm heading in the right direction, or is there a better method that I could use? I found plenty of example for changing text with "innerHTML", but so far I haven't seen any for updating numbers onload by calculation, except for forms, etc, which are different.

The code:

<html>
<head>
<script type="text/javascript">
function changeCurrency(){

[Code].....

I will later put the js in an external file with a link to it "...src="support-files/currencyChange.js" (or something like that), but for now I have put it on the same page.

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[url]

Or there's an rss feed of it here (xml) here:

feed:// [url]

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Nov 22, 2011

I can't figure out this math problem. I have two points p1(30, 20) and p2(30, 221) and the parametric equation of the vector is (x-30)/(30-30)=(y-20)/(20-221)=t x=30, y=20-201*t

I'm thinking t is the magnitude or the distance. For a point P which is 10 pixels away from p1 on the vector, x=30, y=20-201*-10 (should be around -0.85) which is not the right P i'm looking for. Where am i doing wrong?

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Dec 8, 2010

I am having some trouble trying to fix my math equation to calculate the total rent by aquiring values from my form fields. Converting the date fields to days and finding the number of days via two date fields is mainly where I am having trouble. Also, I am trying to have a window pop up before submission but the onclick event does not seem to function properly.Below is the math equation I have come up with:

//calculate days from date field
function calcTotal(date1, date2) {
//assign variables

[code]....

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Jun 22, 2011

I am trying to incorporate two javascript files (using jQuery) and they are creating a conflict.If the main js is on the page part of the page does not work. If I do not include it my menu and some related features do not work correctly.One code is long so here is the link to it: *I removed Link* (this is the main code for the menu etc)The other js is:

$(document).ready(function(){
Engine.Initialize();
if( !$('body').hasClass('index') && !$('body').hasClass('homepage') ) {[code]....

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Apr 4, 2011

my webstie allows users to change the color of the background, so to keep the text readable I have it changing as well.the color picker I am using has text boxes with rgb values 0-255 for each.I am trying to get one bit of text to alternate between red and blue with the conditions

Code:
if(blue>green && blue>red)
{

[code]....

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Jan 20, 2007

For my links I have two portions. The first is the regular href for people that don't have javascript can navigate the site and the next an onclick for those with javascript can load pages inline with transitions and have it stay in their history for Firefox. All a la that wonderful ajax stuff everyone knows about by now.

It seemed like a good idea at the time...
Because it is stored in the #hash value these people can link another person that has javascript enabled as well to the page and have the page load. But that's it. So we have 96% some odd percent of users included.

There is going to be confusion that happens if someone sends a link to someone without javascript, since it will just load the home page.

From what I have researched.. the server doesn't pick up the #hash value (this is obvious since when you click on a link that's linking to a spot in the page, it's the browser doing the work). That's okay, the thing I want anyway is for it to pick up on the very first request via well.. something. The first request is when the server does do something and may have a chance to do something with a hash value.

So questions:
1. Can I manipulate the server into 'reading' this #hash value on the initial request and then put it through say.. php or mod_rewrite?

2. What about css.. this is another client end thing that could work, but I am completely lost when it comes to css and recognising hash values. Even if it just works for Firefox/MSIE/Opera.. well.. that's something as it's non-intrusive and ups the people that can access my site properly.

There is an option to post a noscript tag to notify users on the first load that their javascript is off.. but there's no way for php to also be smart and say "hey, there's a Hash value"... as it could, I would just load the page that way. Code:

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Sep 22, 2004

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.

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Nov 20, 2002

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.

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If I detect an empty textbox, I fill it with a value ('Dad'). If I do this twice, the second time around IE 6 fails to notice that I've cleared the textbox again, thus leaving the textbox cleared. Is there a recommended workaround? Opera 7.23 is detecting the second deletion fine.

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Jul 23, 2005

The purpose of my application is to require a website visitor to complete
a form before participating in a search application. I have a specific
reason for doing this with client-side javascript, but I'm not going to
go into the explanation of "why."

Ideally, the visitor goes to http://www.hopelandinc.com/golf-homes.html.
If they haven't registered in 90 days, they'll be redirected to a
registration form. Once they complete the reg form, they'll have a cookie
set (called "isRegistered") and be taken back to the golf homes page.

For testing purposes, it is not necessary to actually complete the form.
You can go to the golf-homes.html page, which will set the regReturn
cookie, and then bypass the form submission by going directly to
http://hopelandinc.com/registration-thanks.html

In short, it ain't working. (IE 6 test).

golf-homes.html calls the function securePage() below, which sets
regReturn and redirects to search-registration.html.

search-registration is a form that posts to an ASP script, then redirects
to registration-thanks.html

registration-thanks.html calls the function addRegistrationCookie which
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I've been trying to figure out why it doesn't work all day, and can't
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Here is the function I'm using to retrieve a cookie value ("regReturn")
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I'm running this line of code:

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When formattedHtmlText is, say, "<STRONG><BUTTON
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However, if formattedHtmlText is "<BUTTON
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<f:view contentType="text/html" xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"

[code]....

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here's the code:

<CODE>
<html>
<head>

[code]...

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Sep 8, 2009

Here's something that I tested without the PHP and it worked ok. Now that I've introduced the PHP to the document it doesn't work. The PHP variable is not passing to Javascript properly. By use of some cleverly placed alert boxes, I figured out that the only thing that is getting passed forward is something called : "object HTML ImageElement"

Specifically, I assign the element ID the unique ID number of the record in the SQL database. The problem isn't with the ID numbers themselves: They are alphanumeric and unique.I think it boils down to one of two lines of code. Either this isn't working (about line 12)

function expander(RecordID){

or perhaps it is when I am calling the function (about line 66):

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The PHP works (I can get the images to appear, so the connection to SQL and such isn't a problem). I am sure most of the JavaScript is good, too, as I said I had it all working prior to dropping in the PHP.Since I am not going from JavaScript to PHP I don't think I need AJAX. I just need the PHP to pass to JavaScript.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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I found the script from..

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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.

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