Subtracting From Health Variable Using OnClick Function?

Apr 2, 2010

I'm trying to create a short, html/javascript mario text game. Now, in the beginning, he fights a goomba.

He has a health and energy number as variables:

And then, there will be different buttons for different attacks. However, the only one created is "Punch", with this code:

What would I put in the onClick function to make it subtract 4 health from the goomba and 2 health from Mario.

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Onclick Defined Variable - Print Variable Some Place In Document

May 28, 2007

i'm not really sure how to explain this, since I know nothing about javascript, so i'll try and illustrate by the use of php (hope it makes sence)

I have a set of different links, like:

<a href="link.com?page=text1">text 1</a>
<a href="link.com?page=text2">text 2</a>
<a href="link.com?page=text3">text 3</a>
etc, where page is dynamic and can be anything I chose..

Another place in the same document, I echo out what the page variable is, like:

echo "$page";
so when clicking "text 1" the echo will output what i've defined the page to be, in this case "text1" ..

So I want to be able to click the links and change the output of the echo all depending on what i've defined in the link - without refreshing the page!

Is there any easy way to do this?

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Subtracting Won't Work ?

Dec 25, 2011

<html>

I don't see that x loses 10 what's the problem.

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Adding And Subtracting Total

Nov 12, 2009

How to subtract totalgift if my condition of donateamount is lesser than the totalgift trigger.

When the field is selected and the DonateAmount is trigger, I need to subtract the entered amount on the field selected to the TotalGift and put the field selected to zero "0" and TotalGift to original amount which is less than the amount entered on the field selected. I have some code that I created but it doesn't work. My initial javascript to calculate all the total is below assuming that DonateAmount is already selected = 25:

Below is what I am trying to do but it doesn't work. If the first input field is selected and user enter amount greater than the TotalGift, alert will pop-up then and the amount entered by the user automatically added to the TotalGift. So what I wanted to do is to subtract the amount entered to the TotalGift so it will go back to the original amount before the addition occurs. I know it is possible but I just can't get the right code.

My html code below which I have 18 input fields but all of them only optional wherever the user wants to input number. I will only include some here. Code below works, please ignore any missing code. I just need the calculation code to work.

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Subtracting Values In A For Loop?

Dec 7, 2011

I am having difficulty with creating a function that uses a For Loop to pull in two unknown variables and subtracting the first number from the second number. The subtraction occurs but I always get a negative number. This exact same function works correctly when adding but does not when I use it for subtracting to values. Here is what I have so far:

function calcDep1()
{
dblTotal = 0.0
for (i=8;i<=9;i++)

[Code]....

I have worked with it for several hours and also changed the equation to reflect dblTotal = dblTotal - dblValue but it still evaluates to a negative number. The two test values I used are 100 - 50 which should equal 50 but the answer always comes out to -150.

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Subtracting Discount On Order Form?

Jan 3, 2011

I have a custom order form that will add up and show the total but I'm having trouble getting it to subtract the discount. What changes do I need to make to my javascript?

The form is here: [url]

This is the javascript I'm using which is also viewable in the source code of the above form:

Code JavaScript:

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Logic Error In AcroJS - Subtracting Instead Of Toggling

Feb 4, 2011

Putting some javascript into a pdf file and can't get this to work out right.

Basic setup:

Field X = checkbox;
Field Y = numeric input field;

Here's what should happen (increment is toggled):

Y has a value. When X is checked, Y is increased by 5. When X is unchecked, Y goes back to its original, unmodified value.

Here's what really happens (increment is subtracted):

Y has a value. When X is checked, Y is reduced by 5. When X is unchecked, Y is reduced by 5 again. Anytime X is clicked on, Y is reduced by 5 yet again.

Here's the code:

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Declare A Variable Inside A Function - Returns White Space - Not Variable Value

Aug 17, 2010

I am trying to declare a variable inside a function and use it later on in my code... but it just already returns white space... i.e. not variable value. I am setting it within this function:

function show_video1(){
document.getElementById('video1').style.display="block";
var video1Name = "Education World News (Part 1)";
document.getElementById('video2').style.display="none";
document.getElementById('video3').style.display="none";
document.getElementById('video4').style.display="none";
[Code]...

and trying to call it later on with this: <script type="text/javascript">document.write(video1Name)</script> It might be worth noting that each one of my 11 videos will hace a different name.

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Dom Onclick Variable Value

Jul 24, 2006

I am trying to apply the current value of variable i to the links onclick event
I've even tried assigning it to variable j but the only values I get when any link is clicked is

i = 5
j = 4

The "page"+i and "Link"+i show as they should with variable i showing the correct value. Code:

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How To Put Variable In Onclick?

Feb 20, 2005

I have a JS variable I want to write inside of a onclick="" attribute. Example:

<script>
var cool = "hello";
</script>
<a href="#" onclick="RunFunction(cool)">Text</a>

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Send Variable To Url Using Onclick?

Jan 16, 2009

I know how to pass a variable to a url using href.

(href="thisurl.php?thisvar=thisvalue")

now I want to do this using onClick, how do I?

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Passing Variable In Onclick?

Apr 2, 2009

Basically, I have a form with some text fields, and I want to put a button next to each text field, so that when a user clicks on the button, it increments the value in the field by 1. I know how to do it if I know the id of the text field, but what if the id of the text field is a variable? How do I do it? Here's my code:

<script language=javascript>
function process(v){
document.getElementById('order_item' + v + '_quantity').value++;

[code]....

My issue is with my onclick statement:

<input type="button" value="Add +" onclick="javascript:process(0)">

This works fine for my first field, but I need to have one for every text field, so how do I pass my counter variable (which determines the id of the appropriate text field) to the process function?

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Pass Variable With Onclick?

Apr 17, 2011

I have a book on my page consist of 3 iframes, 1 iframe opens the table of contents and 2 iframes to open 2 pages at the same time, also i have 2 buttons to navigate pages next and previous through this function

[Code]...

the problem starts here, if i click on next-previous button I want it to continue from page 36,37 but what happens it continue from pNum in the function, how to update the pNum from onclick ?

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Changing Variable Value With OnClick?

Nov 13, 2011

I am building a site where I want all links to partial page reload using xmlhttprequest and innerhtml. I have done this before, butI always had to have a seperate xmlhttprequest function for each link. So this time I am trying to write just one function, and have the onClick change which document the request is getting. It is not working and I appear to novice to figure out why. Here is the code, i have bolded some relevant lines:

<script type="text/javascript">
function ChangeContent()
{
var whichPHP;

[Code]....

Also, if I use the innerhtml function to write another of these hrefs, will that link be able to access the function if it is in the header, or should I put the entire function in a .js file on the server? The point of all this would be that the entire page never reloads and all the text content is swapped out on demand.

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Url Variable To Onclick - Can't Get The Next Page To Load

Sep 22, 2009

I am trying to use an onclick statement to go to an alternate web page displaying a different version of tha file being displayed in the current page.

In the HEAD section of the current page I have a global variable named currentfile that contains a file name. This function is also in the HEAD section immediately below the variable's declaration

I have tried every combination I can think of in the onclick code to get it to work but, no joy. here is an example:

I just can't get the next page to load.

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Pass Dynamic Variable To Another Div With Onclick?

Aug 30, 2010

I am trying to access a dynamic asp variable with onclick either in a javascript function where I can use it globally or set another div id with this dynamic variable.

<script>
function doSomething(article_id)
}

[code]....

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OnClick, Create Php Variable And Echo Out

Sep 27, 2010

I have a form, that when the user click Submit, I need a php variable to be echoed to the page. This is for an upload page. So when they are waiting for the file to upload, it will say "Uploading..." until the upload is complete.

All I know so far is I need to create a javascript function and include it in the submit button. This is all I have so far in the submit button tag:
onClick="Transferring();"

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Onclick Display Variable Content?

Nov 4, 2010

I'm trying to make a basic rss reader with a google reader-esque functionality of clicking on article names and being able to expand/collapse that article. I'm working on the expand part and am going crazy. I am having no trouble getting content and displaying it without the onclick function but when I try to integrate onclick I can just get the titles.

[Code]...

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Variable Scope In Onclick Event

Oct 17, 2010

I have this web application where users are able to fill out and submit reports. The reports and scripts are part of a whole system, that is, they are used on a couple of different clients written in both vb and c#. This is the web-version of those clients.The scripting language is javascript and is executed using different script engines on the different systems. But for the web-version it is just executed in the browser.The different fields in the report can be accessed by typing:ID1.value. To get ID1 to apply for the input-field with id ID1 I had to in the initfunction of the page write a window["ID1"] = document.getElementById("ID1");

But my problem is when this element change. Cause in the report I have a special element that in the browser is translated to a table-element with a report-field in each cell.When I switch the current row, I need to update the window["ID1"] to equal the correct report field on the selected row. But when trying to access the new variable ID1 from a buttons onclick event it is undefined.<input type="text" id="test" onclick="alert(ID1.value);" />What I think happens is that when the page is first drawn the onclick event is created and as I understand, variables inside an event has the same value as when the event was created.

So if ID1.value was something when the page was created it will be the same when it is called even if the value of ID1 is different. And that seems to be the case. When I debug the page, before entering the event, ID1.value has the correct value while inside the event it is undefined and after the event it has the correct value. If I write window["ID1"] correct value is also shown.But a weird thing is that in another place in the code I had the same problem but instead of having the code inside the onclick event I first had a global function changeActiveRow and inside that I had an eval, eval(document.getElementById("ID1_script")) where ID1_script is a hidden element whos value is a script using ID1.value and that works.

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Retrieving A Variable And Then Incrementing And Displaying Onclick?

Feb 10, 2010

Simply put, I need to take a variable (The number '20' in this case) that is displayed by an input box on my web page and plug it into a function so that whenever I click on a button, the number in the input box will decrease by 1.

Seems simple enough, though for hours I've been going at it with no luck. Skipping the rest of my code - I currently have:

<head>
<title> Online Slots </title>
<script type="text/javascript"
src="http://dave-reed.com/book/random.js">

[Code].....

The entire code is a slot machine project that's supposed to be extremely simple where you hit the button and it spins 3 wheels, 3 of the same image and you win. Every spin takes $1, every win gives $13.

The majority of the code is already working, however for some reason I appear to be failing badly at getting the read out to show a decrement of $1 every time you push the button.

I've tried so many different ideas that I've found across w3schools, webdevelopersnotes, dave-reed, ect - and so far I haven't been able to get any of them to work correctly.

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Onclick Not Working If Form Id Has Same Name As Js Object Variable?

Aug 6, 2010

Below is the code that is using the name FFF in various places. The effect of all this is that the onclick function is not executed. I would expect a pop up alert when clicking the submit button. This only happens if I rename either the form id or the js variable. Can anyone explain what is going on here ?

[Code]...

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Setting Cookie OnClick, And Or Passing A Variable?

Sep 21, 2009

I'm more of an actionscript person but got roped into an html/javascript job.What I need to do, and it shouldn't be that difficult is this:page1.html - there is a yellow button and a red button - if the user clicks on the yellow button I want to set a cookie with the value "yel" then load the next page - if they click the red button set that cookie with the value "red"page2.html - 'onload' i want to read that cookie and load up the main image to match, something like this maybe?... document.mainimage.src='img/main_' + variable + '.png'so that the path would be for example 'img/main_red.png'f you think this would be easier sending that variable in the URL instead of as a cookie please explain. I'm having a very hard time searching for tutorials that are any good and that do exactly this kind of thing.

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JQuery :: Set An Onclick Event With Passing A Variable As A Parameter?

Mar 20, 2011

what i want to do-

$
(
"#temp"
).

[Code]....

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OnClick Event Images Deliver A Variable To Another Page?

Sep 11, 2009

I have a html page with a lot of thumbnails. The idea is that when the user clicks on an image the onClick event is to display another detailed form and deliver to that form the name of the image in a variable. In the detailed php-form there is a query to MySQL to retrieve a record. The record will be retrieved by a Query based on the name of the picture. Apparently the PHP cannot do the job. I had an idea to make the thumbnail page as a form and to use use a hidden field with the thummnail name which should be carried on with the $_POST array through the submit button but i do not want to have a submit button. The more elegant way is just by clicking the picture the detailed page is opened and the variable is transferred where my php code can make use of the variable for the query. I have never used java before so you have to excuse for the lack of knowledge.

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Onclick Accordion Works In IE7 But Not IE8 (variable Is Null Or Not An Object)

Apr 28, 2010

Hey all, I'm using a fairly simple accordion script. When I went to take a gander at the page in IE I found that the onclick function of the script doesn't respond. It works in FF, Safari, Chrome and Compatibility Mode in IE 8

the error message IE gives me is

Message: 'h' is null or not an object
Line: 13
Char: 77
Code: 0
URI: http://proposalfor.us/js/script.js

The problem line (as far as I can tell) is:

this.a[s]={}; this.a[s].h=h=T$$(e,v)[0]; this.a[s].c=c=T$$('div',v)[0]; h.onclick=new Function(this.n+'.pr(0,'+s+')');

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JQuery :: Use A Variable Declared In A Function Outside A Function?

Nov 17, 2011

So I've got this checkbox thing going on, where an array converted with the value of each checkbox in it.It looks like this:

[Code]...

What I want out of this function is the variable newworkdays to use in another function.

How do I access the "newworkdays" outside the function? I've already try to declare the variable outside of the function, though that resulted in that I didn't get the value of the variable inside the function.

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