Boolean Value For A Button?

Dec 7, 2010

I'm trying to modify this function code...

which works for a checkbox to one that works for a button.

I guess I'm stuck on what to replace "checked" with there in the 3rd line.

is there some one word answer, or do I need to I rewrite the function to be more button-friendly?

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Boolean Opposites

Feb 15, 2007

Is there a way to write this simpler?


function makeOpposite(a) {
if(!a) {
a = true;
}
else {
a = false;
}
}

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Jul 23, 2005

I have a simple JS function that I want to return a true or false value
based on the parameter passed in. At this point of time I receive the
error "'True' is undefined". Here is my code below.

JS Function -

function ShowSpecifiedPeriod(pShowPeriod){
document.mfperformance.ShowPeriod.value = pShowPeriod
document.mfperformance.method = 'get'
document.mfperformance.action = 'composite_requestdata.asp'
document.mfperformance.submit();
}

ASP Event Handler -

onclick="ShowSpecifiedPeriod(<%If bShowPeriod = false then
Response.Write true else Response.Write false%>)"

The ASP variable bShowPeriod is set based on the hidden form field
"ShowPeriod" and the initial value is set to false.

More than likely this has to do with the boolean Parameter but I am not
sure how to handle this in JS. I have tried the following but receive
the same results.

function ShowSpecifiedPeriod(boolean pShowPeriod) - Same Error
function ShowSpecifiedPeriod(pShowPeriod boolean) - Same Error

Please let me know what I am doing wrong here.

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Dec 24, 2009

I'm trying to get a return boolean or something I could use to then do another asynchronous request have my first has completely finished.

I'm messing around with Javascript on this basic PHP blog I built and I have a table of articles and one of the table columns is published/unpublished. I'm trying to have when they click the icon it will connect to MySQL, update the current row with new publish value (opposite of current) then refresh the div id element that the publish/unpublish icon is in to reveal the new status. I built a class for my javascript requests so most values are stored in global properties.

I think what I'm coming across is when I click the icon it updates the table but before that onreadystatechange can hit 4 my request for the new content is going through so the request url I'm using as well as the return div id for the responseText are getting mixed up between trying to do a sql update, loading the responseText in "message" then trying to sql query for the new results and loading that responseText in "content".

Something like..

url = "?table=articles&value=1&id=2";
http.onreadystatechange = this.stateChange;
http.open("GET" , url , true)

[Code]....

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Mar 20, 2010

I am very new to javascript and html. I am trying to create a function which will hide or show a div (div1). Right now, it is always showing the div whether the boolean value is true or false. I know that it is getting inside the else if part, but it doesn't seem to be working.

<script type="text/javascript">
function hideDiv(flag){
if (flag == false){
document.getElementById('div1').style.visibility="visible";
}else if (flag == true){
document.getElementById(div1).style.visibility="hidden";
}}
var bool = new Boolean(true)
hideDiv(bool);
</script><body>
<div id="div1">
Text!
</div></body>

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I have a list that looks like this:

<ul id="thisList">
<li class="this0">content</li>
<li class="this1">content</li>
<li class="this1">content</li>

[Code].....

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Jul 13, 2010

I am trying to produce a web form to allow wedding guests to RSVP. The form allows them to enter a name and select from a radio button whether they will be attending or not. If they select the "yes" radio button then a further pair of radio buttons are displayed for their meal preference.

They can then click a submit button or they can click another button to add another line for another guest which operates in exactly the same way. I've almost got this working, but it seems that the checkbox change handler is lost for the current guest when a new guest is added and the checkbox value is reset. I've got a feeling I'm doing something stupid but can't for the life of me figure out what.

Code (source file (renamed to .txt) also attached as I'm not sure the pasted code is too clear):

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I have it set up so that there are three frames (frames and the use of javascript are encourage for practice) "bar" on the left with navigational options, "main" in the center where the body of the drill is presented, and "feedback" along the bottom where the feedback will appear.

My issue is that I have everything working except the form! I'm not sure how to make it so that upon clicking the submit button the feedback is presented in the "feedback" frame. This was suggested to me but isn't working, maybe I have a mistake somewhere? Or is there another way I can do this?

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

[Code]....

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Nov 16, 2011

What happens is that when I click on a button, a random string from the RandomString variable appears below the button. e.g I click on the button and it displays 'AAB' and then if I click on the button again it may display 'AAE' and etc.

The problem is that sometimes it displays 'undefined'. I don't wanit 'undefined' to appear but why does it sometimes display 'undefined' rather than a Random string.

Below is the code:

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I have this as my Dialog Javascript

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[code]....

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The main page is called Aj.html. In the 'head' I have mostly some functions to support Ajax call to server PHP (to just 'echo' something so I could see Ajax work). In the 'body', there is a little javascript and a form 'button'. When I click the button, an 'onclick' event causes a function to do the last step or two of the Ajax stuff... and the server PHP element is called... and then my ajax message handler back in Aj.html gets control to just send an alert... and that was the initial experiment ... and it was just so I could see how Ajax works.

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What's currently happening is this: when I'm in the part of the code that is defining the dynamic button - and just before that button is added to the form, I define the 'onclick' that is supposed to be a part of that new button... BUT - when that assignment is made, it is almost like javascript is thinking that the request is actually in insert another onclick for the in-progress 'click'... because the new onclick is immediately processed at that point (I don't even make it to the next statement...just boom... the new onclick function is executed).

Also - the new dynamically added button DOES get added okay... but when I click that newly added button, it doesn't fire the Ajax stuff it's supposed to fire (via the onclick for this added button) - instead, it just causes what appears to be like a page refresh ... because the regular button reappears at that point (and then the Ajax stuff will again work off of that 'regular' button).

I'm including the whole script here.

Code:

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<script type="text/javascript">
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<script type="text/javascript">
function loadXMLDoc2(File,ID,Msg){
if (window.XMLHttpRequest) {[code].....

And getShow.php produces a table with a list of product images, names and prices, based on theme.

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[Code]...

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<head>
<script language="JavaScript">
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[code].....

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HTML Code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Untitled Document</title>

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Here's my reset button code:

Here's one of my table input lines:

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