Math Equation Getting Values From Form Fields?
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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Jan 12, 2011
I want to create a mathematical formula plugin for my website where users will enter their own numbers based on the formula in an html form style. The formula is (a)*(b)^2/800 I want their to be a box for users to submit their data which will be (a) & (b) and then a box below showing the calculation. Also buttons giving the users the option to "calculate" and "clear fields". Is there a website where I could input the formula and they could generate the coding?
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Jan 27, 2010
I have 4 text boxes that are supposed to load 4 seperate values of data from one field in one table from a database. The field is called interface_cropsettings (from the interface table) and these values have been concatenated and comma seperated in this field.
Code:
Once the form is filled out and saved, the data is inserted into the database and the values from these 4 text boxes are concatenated, comma seperated and inserted into that one field correctly.
(Example)
If the 4 text boxes have the following values:
In the database field they become:
However, if the form is closed and then re-opened, each text box displays the entire database field rather then each value seperated in the corresponding text box.
(Example)
All 4 text boxes display this:
I already know why the data appears like this in the form, my problem is that I'm not sure how to write the javascript to seperate the values into the correct corresponding fields, assuming javascript is what I should be using!
Also, this is kind of irrelevant but just in case you're wondering, this form is part of a cold fusion application!
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Jul 23, 2005
i have a form and would like to check two fields.
if field 1 containes the letter 'c' and the other field contains
'undefined', then an error should apprear ina box on the screen.
can anyone point me a piece of code ?
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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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Feb 14, 2009
I have a form that I am trying to loop through the elements of and come up with a total, when the form is submitted. The goal is to alert users that they have not entered a minimum or maximum number of choices before letting the form submit. The fields in question might be checkboxes in some cases (with a value of 1) or textboxes in others with user-submitted values. Here is a stripped down example...The html
<form class="phpws-form" id="elections_vote" action="index.php" method="post">
...
<input type="text" name="Candidate_Vote[2]" id="Candidate_Vote[2]" size="3" value="" />
<input type="text" name="Candidate_Vote[3]" id="Candidate_Vote[3]" size="3" value="" />[code]....
...problem is, is that total is always 0. I know I'm missing something, and I suspect that 'inputs' is not what I want it to be,
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Feb 15, 2010
I want to do is add the values of seven text fields on a form and pop that value to an eighth field. I thought the code below would work, but I get "NaN" on the sum field.
Code:
function addHazWaste() {
document.getElementById('HazardousWaste').value = 0;
var HazWasteTotal = 0;
var HazWaste1 = 0;
var HazWaste2 = 0;
var HazWaste3 = 0;
var HazWaste4 = 0;
var HazWaste5 = 0;
var HazWaste6 = 0;
var HazWaste7 = 0;
HazWaste1 = parseInt(document.getElementById('HazardousWasteSentToLandfill').value,10);
HazWaste2 = parseInt(document.getElementById('HazardousWasteSentToWasteToEnergy').value,10);
HazWaste3 = parseInt(document.getElementById('HazardousWasteIncinerated').value,10);
HazWaste4 = parseInt(document.getElementById('HazardousWasteRecycled').value,10);
HazWaste5 = parseInt(document.getElementById('HazardousWasteReused').value,10);
HazWaste6 = parseInt(document.getElementById('BiohazardousWasteSentToLandfill').value,10);
HazWaste7 = parseInt(document.getElementById('BiohazardousWasteIncinerated').value,10);
HazWasteTotal = HazWaste1 + HazWaste2 + HazWaste3 + HazWaste4 + HazWaste5 + HazWaste6 + HazWaste7;
document.getElementById('HazardousWaste').value = HazWasteTotal;
}
If I run a separate function that just sets all form field values to zero (including the first line of this function). The summing works!!! Why won't it work the way I wrote it??? It won't work if I set the default value for the sum field to zero, either...
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Dec 14, 2007
Well, it's been a while since I last visited CF, but I'm finally back and, for the life of me, am drawing a total blank on something that seems like it should be fairly easy to handle.
The Math.sqrt() function works just fine if all a person needs is the Square Root of a number, but what about needing the Cube Root or even a 4th Root of a number?
My first instinct was to use the Math.pow(x,y) function with a negative value for "y." For instance;
var z=Math.pow(27,-3)
This should return a value of 3. Unfortunately, this doesnt seem to work when I tested it through the W3 reference pages, so I am looking for a clue as to how I might go about finding such values, or if it is even possible through Javascript.
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Jul 8, 2009
I am trying to assign values to a bunch of form fields. However, I don't want to loop through EVERY field in the form, just a specific subset of fields. The fields I am trying to change are all named similarly myField1, myField2, myField3.So, my thought is that I would like to use a for loop and loop through the appropriate fields by simply incrementing a variable and appending it to the end of the string "myField" in order to change the appropriate field.How can I evaluate "myField + iterator" into a useable reference to change the value of said field?
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Jun 6, 2009
I'm working on an ordering form which calculates the total order price using Javascript. I have a checkbox which I want to use to toggle the display of various items, and also reset the value of an item depending on whether or not it is checked.
Further details
I have a checkbox for the colour "Black" which, when checked, hides a SELECT, a bit of text, and "Quantity" field. It also resets the value of the "Quantity" field to zero.
When the "Black" checkbox is unchecked, the three items (SELECT, text and Quantity) are revealed again, and the Quantity field for "Black" is reset to zero and hidden.
The reason is that users can only either EITHER a black item or select from a list of colours. Black items are a different price to all others.
How the form works
When the user enters a quantity into a text field for each item, the price of that item is added to the total at the bottom of the form. When the form is submitted (with PHP validation), it emails the order to a salesperson. The price of each item (for emailing the order) is set using hidden form fields with defined values, while the order total is calculated using the id of each quantity field (e.g. "item_31_85.00").
What I need to know
I want to achieve the following when the "Black" checkbox is clicked:
Toggle the display of three items (SELECT field, text (in a DIV) and an INPUT)
Reset the value of the INPUT field (and reset a different INPUT when the checkbox is clicked again)
My current code
The code I'm currently using in the PHP form is below (truncated for readability):
Code:
<input type="checkbox" name="black" onclick="togglecontent('colour_box','colour_price','color_quantity','quantity_reset')" /> Black
[Code].....
Currently I can hide the SELECT and accompanying text when I check the "Black" checkbox, but it won't reset the INPUT value nor hide it. I've not yet attempted to do unhide and hide the Black text and input since I can't get this part working yet.
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Nov 26, 2011
I designed a form having ten fields, will it be possible to have a jquery function that will make all the values in the form field to be displayed in a separate div outside the form by click of a button or a link?
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Feb 4, 2010
I have a contact info form with about 16 fields. I need to hide a subset of fields for address when the end user either (1) tabs out of the subset group, (2) clicks anywhere outside the subset field group.
I do not want to hide the fields when the end-user is tabbing within the subset of address fields, yet the focusout handler is triggered when it shouldn't be.
[Code]...
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Oct 10, 2009
There are two input fields in a form, but only one of them is required, they are not required at the same time. Either A or B is required. ( A is required OR B is required). In other words, a user can input data to field A, or he can input data to filed B, but he can not input data to Both A and B at the same time. How to implement this constraint in Jquery form validation?
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Feb 3, 2011
I need to get the values of two hidden fields and values that make a query in my database and return this column to a text field in the same form, I have already informed the forum here that can do that with Ajax, researched and made an example But it is not working.
I am sending the code below:
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Mar 1, 2011
I have a form with a field that asks for a full year. If the year is greater than 20 years ago, I'd like additional form fields to be revealed. If the year is equal to or less than 20 years ago, it will not reveal the fields. (And it should be based on getFullYear(), so I don't have to update the script every year, yeah?)
I figured out how to script onclick functions and some basic .value == functions in order to show/hide just about every type of form field. So I don't need that info. But I'm unsure of how to calculate the value.
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Feb 20, 2010
the program that i want to create will first let the user input how many execution he want to perform and will determine the highest and lowest number that he inputted.
for example.
prompt: how many execution you want to perform?
i type: 5
prompt:input number:10
prompt:input number:8
prompt:input number:5
[Code]....
but it only allows for the up to inputs[6] and the code is very long. i think i can use looping in it. but i dont know to use looping in math.min and math.max.
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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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Oct 11, 2006
I have been looking for the past 2 days for a script that I can add and delete table rows.
I have found a lot but so far all of them add an input field but I desperatly need a textarea or ideally a section of input fields.
I have tried to change the code from input to text area but none of them worked.
Have you come across to a similar script.
I would appreciate any contributions.
What I am trying to do is a page where the user will add their employees details so we can order business cards for them. So I have fileds such as, Name, Tel Num, Email, Cell etc.
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Jan 24, 2011
I have this order form where the customers can change the quantity by intput in a text field.I would like to have the text field changed with select fields, but doing so in the form, the script is not doing anymore.Can anyone have a look and tell me what to change in the scritp to accept select fields in place of the text fields.
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Dec 10, 2010
I am looking to use the outputted data of the US Census' world population clock as the raw data for a javascript function on another site - does anyone know if it is possible, looking at their site?
[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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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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Sep 22, 2009
If I have the basic form below how can I alert only the fields that the user inputs something. I would like to alert the name of the field and it's value. There may be more than one field that has a value.
Code:
<form method="POST" name="theForm" action="--WEBBOT-SELF--">
<p><input type="text" name="T1" size="20"></p>
<p><input type="text" name="T2" size="20"></p>
<p><input type="text" name="T3" size="20"></p>
[Code]....
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Feb 6, 2010
[code]
function updatesum() {
document.form1.totalfat.value = (document.form1.satfat.value -0) + (document.form1.monofat.value -0) + (document.form1.polyfat.value -0);
}[code]
[icode]
<body onload="updatesum()">
<form name="form1" method="post" action="./submitFood">
<table width="520" border="0"> .....
I like to sum the values from the "satfat", "monofat" and "polyfat" text field into "totalfat" textfield. The values in those 3 text field is retrieve from database. However, when it add up the 3 values, it will not be in decimal place instead it will be in 30.10000000000000000000000002. How do I solve it and how to go about editing the code.
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Jun 15, 2011
I have a xhtml page (JSF project) I have inputText fields, every time I check a checkbox to display a text area, all the information that is in my inputText fields disappears (I already posted in the JSF forum), Is there any way to use JavaScrip to keep the values in those fields? Basically when I check the checkbox I call the onchange="this.form.submit()" , So I would like to know if using javaScript I can capture the values in those fields, and after I change the value of the checkbox and the information is erased, rewrite the values into those field
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Nov 19, 2011
I have the below code in an html page and, since I cannot change the hidden types to text (no control whatsoever on the form), I manually add the values in the code. Clients only need to press "Submit", which is the only visible part of the form on the screen, and they are then taken to a page outside of my website.
Code:
<FORM action="...................." method="post">
<input type="hidden" name="Charge" value="0,00">
<input type="hidden" name="MerchantCode" value=".....">
[Code]....
What I want to do is add two Text Fields in the html page where the above code is given to allow clients to add text and somehow "feed" this text to the values of the hidden fields Param1 and Param2. This way, the added text will show up in the page outside of my website where the clients are taken after they submit the form.
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