Compare Two Text Fields

Apr 28, 2004

Here is my code:

if(document.myForm.minbid.value > parseInt( {
alert('Your bid amount MUST be higher than the starting bid price');
return false;}

This is the section I am working with. Now this checks a form field called minbid against a form field called bid. These are both text fields. This works great using this example:

minbid = 20.00
bid = 1.54

In that case the alert will popup because bid is less than minbid, however in this case:

minbid = 20.00
bid = .54

It does NOT show the alert and allows the form to submit. Any ideas here?

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May 15, 2009

How to compare background color of a textbox ,i have tried the following code but it is not working


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Apr 5, 2006

I've a page where I'm calling record from Database. Each record has an
ID and a text box displayed on the page. When the user fills in the
values of a text box, depending on the values of the text box i've to
do some further work. For eg. I've to add two records if the textbox
value of 2 records is same.

I'll try to create an example here
<-----this is from the DB-------> <-----this is form field--->
ID Task Hrs text box
1 adsfsd 1 a <---- user fills this
2 asdf 1.5 b <---- user fills this
3 eyst 2 a <---- user fills this
4 dghjfghj 2 c <---- user fills this
5 xdfb 1 b <---- user fills this
6 tyety 1.5 c <---- user fills this
| Submit |

So the user has to add hrs of those boxes for which have same values
entered by user. such as adding hrs of record 1 and 3 since both have
"a" entered by the user, adding record 2 and 5, as both have "b"
entered by the user and so on and so forth.

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Jul 11, 2011

I have one html text area in my JSP file. when i click on that text area, a pop-up will come, in that pop-up i have list of items. So after selecting a item from that pop-up list, need to click okay. so that text area will update with the selected value.

In this case, i need to compare the first text area value and updated text area value. How can i do that in Java Script.

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Oct 26, 2008

I am unable to solve two problems when creating a contacts form using dreamweaver CS3. My other problem is posted under the heading, "Setting text field to accept only alphabetical characters".For this posting, can someone please tell me how to modify my code, pasted below, so that the "Contact Tel" and "Confirm Contact Tel" text fields are compared and must be identical before the user can successfully submit the form.Here's my current code

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "">
<html xmlns="">


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Jan 24, 2011

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Jul 16, 2011

I have a problem created by my complete [rookie] status – only second time venturing into jQuery. I created a simple shopping cart using php and the PayPal buttons (1: buy now, 2: add to cart). The php back end does it great, it generates the table and the buttons and everything works just like it’s supposed to; Except, I forgot to add sizes. So I found out what I need to add, and I realize that the way the buttons work, I will have two different text boxes for size. Not very visually appealing, and since I’m not submitting this to the server before it goes to PayPal to pay, I cannot modify it with php the way I normally would. jQuery / javascript are my only hope of making this work. What I want to do:Have a single textbox where [size] is entered by the user.

Copy the value from the [correct] text box to the Value=”” section of the now hidden field in the PayPal form That way, no matter whether they [BUY NOW] or [ADD to CART] the right size is submitted to the PayPal shopping cart. This is the actual PayPal code that I’m trying to change

<input type="hidden" name="on1" value="Size" maxlength="200">Size</td>


I got this far, and then decided to find how to insert the "enteredVALUE" into the right place in the input text field (what I called output) and I've not been able to figure out how to stuff it in there.

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Apr 19, 2011

I have a request from a client to have four text fields added together as soon as they input the number.

They want the numbers to add together with out having to hit a submit button or have the page change. I have seen and been able to get two out of the four to add together but i can't get the rest. this is the code i have been trying to work with:

function calc(A,B,SUM) {
var one = Number(A);


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Nov 30, 2010

I need to do an input text validation which include opening parenthesis and closing parenthesis, what I need to validate is the opening parenthesis match with closing parenthesis. Here is a sample of the entry text:


There's one closing parenthesis missing. I would like to warn the user to correct it before submit, but not quite sure how to do it with javascript.

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Nov 30, 2010

I need to do an input text validation which include opening parenthesis and closing parenthesis, what I need to validate is the opening parenthesis match with closing parenthesis. Here is a sample of the entry text:

thisis(test(of(matching(parenthesis)and)if)working There's one closing parenthesis missing. I would like to warn the user to correct it before submit, but not quite sure how to do it with javascript.

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Oct 1, 2006

When the user clicks a certain radio button, I want three text fields to become disabled.

HTML Code:
<label><input name="s_type" type="radio" value="ftp" />FTP</label>
<label><input name="s_type" type="radio" value="http" />HTTP</label><br><br>
<input name="ftp_server" type="text" id="ftp_server" size="35" /><br>
<input name="ftp_username" type="text" id="ftp_username" size="35" /><br>
<input name="ftp_password" type="password" id="ftp_password" size="35" />

Could anyone show me how to disable all the text fields above when the user clicks the "http" radio button?

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Feb 6, 2010

function updatesum() {
document.form1.totalfat.value = (document.form1.satfat.value -0) + (document.form1.monofat.value -0) + (document.form1.polyfat.value -0);
<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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I've tried to do it using the funciton below, it cycles through allright, but only highlights each field whilst it is in focus, then loses it when it moves to the next field. The result is that only the last text/textarea within the form is highlighted. My aim is to highlight all fields for subsequent spell checking.

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Aug 7, 2008

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<!doctype html public "-//w3c//dtd html 3.2//en">


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I've created two form fields (username, password).When a user comes to the page, the word "Username" is shown in the first form field. The word "Password" is shown in the second field. When a user clicks inside the field, the word inside the field erases automatically, allowing them to type in their username. Everything above is working, except I'm running into some problems.

1st: I need to figure out a way to include an if statement, that displays "Username" once again, if they did not type anything in the username field, and they clicked outside of the field. This will be the case for the Password field as well.

2nd: If a user types in their username in the username field, then types in their password, but clicks on the Username field once again to fix a typo, it completely erases their username from the field, making them have to type it all again.

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function disableTextField(form) {
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I have seen many character counter scripts (with feedback), to count the characters of a text box. However, I am trying to accomplish the same thing however need to make sure the combined value of two text boxes don't exceed a limit. Ie... there is a visual countdown of number of characters remaining (val) of the two text boxes combined, and an error pops up if it is exceeded.

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Nov 14, 2000

I have a small shopping card which has text fields named
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Customer can update quantity fields and then update form by clicking on update button. But then I wanna read all quantity fields, but there are more fields than only quantity.
So it should be something like this I think
for (i=0;i<this.form.items.count-1;i++){
if insrt( with "quantity_")
check every char at myfield.value

I am so bad at javascripting so 2 main things i need
to get collection of formfields(how?) and then compare fieldname with a string(how?)

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I have a client who wants to automatically send coupons that are selected by the customer on this page. Now, this will be handled by a mailing list software but it was suggested by the support team that the input fields (labeled coupon#_#) could be populated by using Javascript. There are 3 coupons and here's how have them structured:

<div class="coupon1">
<hr />
<img src="images/logo-wow.png" width="188" height="81" />
1712 SW Railroad Ave (Highway 51)<br />
Hammond, LA 70403<br />
(985) 542-7969

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Sep 2, 2011

I have 2 input fields.
Input 1: Website URL
Input 2: Website Directory

Firstly I would like the "http://" to automatically appear in input one and two and it can't be edited or removed. Then whatever is typed in input one, I would like it to automatically copy into input 2, and the user can't delete whats in input 2 without going through input 1. Then lastly the user can add data into input 2, without input 1 changing.

Here is an example:
Red = Can't be deleted Green = Can be changed Blue = additional text to input 2
Input 1:
Input 2:
How to do this?

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Nov 30, 2010

They are not very expert in javascript. I created a script that needs to calculate the sum of text fields. My function is limited to 5 elements, you can simplify and make it work for n elements.

PHP Code:
function somma() {
var a=eval(document.getElementById("primo").value);
var b=eval(document.getElementById("secondo0").value);
var somma0=(a) - ((a) * (b)) / 100;
var somma0=Math.round(somma0 * 100) / 100;
var b1=eval(document.getElementById("secondo1").value);
var somma1=(a) - ((a) * (b1)) / 100;
var somma1=Math.round(somma1 * 100) / 100;
var b2=eval(document.getElementById("secondo2").value);
var somma2=(a) - ((a) * (b2)) / 100;
var somma2=Math.round(somma2 * 100) / 100;
var b3=eval(document.getElementById("secondo3").value);
var somma3=(a) - ((a) * (b3)) / 100;
var somma3=Math.round(somma3 * 100) / 100;
var b4=eval(document.getElementById("secondo4").value);
var somma4=(a) - ((a) * (b4)) / 100;
var somma4=Math.round(somma4 * 100) / 100;
<input type="text" id="primo" onKeyUp="somma()" /><br /><br />
<?php for($i=0;$i<=4;$i++) { ?>
<input type="text" id="secondo<?php echo $i; ?>" name="secondo" onKeyUp="somma()" value="6" />
<input type="text" id="somma<?php echo $i; ?>" /><br />
<?php } ?>

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Jul 23, 2005

Why doesn't this work? :-

<BODY onkeydown="display(event)">
<input type="text" name="text1">
<script language="Javascript">
function display(event) {
document.text1.value = event.keyCode+' : '+String.fromCharCode(event.keyCode);

Error: document.text1 has no properties

I have to put it in a Form to get it to work :-

<BODY onkeydown="display(event)">
<form name="form1">
<input type="text" name="text1">
<script language="Javascript">
function display(event) {
document.form1.text1.value = event.keyCode+' : '+String.fromCharCode(event.keyCode);

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<script language="javascript" type="text/javascript">


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