JavaScript - Declaring And Using Variables In Javascript

Hi, I am doing a Validation for Form "Text input". If the user leaves the input empty, a function is starting to run. If the field is bigger than 1 - so it doesn't get into the function.

The problem is: The first time, the user left the input empty, function ran, and I got the alert - that's OK. Second time, The user added 10 in the AGE input - And again he gets the Alert - But he should not.

Note: Age input value, returns from a different function (calc) to a var called: result.

this is the code:

Code:

$(document).ready(function(){
	$('#btn_send').click(function(){
		//var result gets the value from another function of input "Age" value. -> return thisform.Age.value
		var result = calc(document.getElementById("campaignform"));	
			if (result<1)
			{
				$("#campaignform").submit(function(event) {
				event.preventDefault(); alert ("prevent default");
				});
			}
			else{
			return true;
			};
	});
});

so if you try the second time to click on Submit, then you get into $('#btn_send').click(function() and eventhough you added for example 67 in the AGE (return as result) input, you get into the IF statement which is: if (result<1)

I'm pretty new to developing, so I hop you will understand me. Sorry if I have mistakes. Can you advice what could be a better TITLE for this question?

thanks in advance, Shai

All --

I have a JavaScript config file called gameSetting.js which contains a bunch of variables which configures a particular game.

I also have a shared JavaScript library which uses the variables in gameSetting.js, which I include like so:

<script type="text/javascript" src="gameSetting.js" ></script>
<script type="text/javascript" src="gameLibrary.js" ></script>

In gameSetting.js I have:

$(document).ready(function()
{
// call some functions / classes in gameLibrary.js
}

in Firefox, Safari, and Chrome, this works fine. However, in IE, when it's parsing gameSetting.js, it complains that the functions that live in gameLibrary.js aren't defined. When it gets to parsing gameLibrary.js, the variables in gameSetting.js are reported as not being defined.

I've tried dynamically bootstrapping the gameLibrary file using this function in document.ready for dynamic load...

$.getScript("gameLibrary.js");

However, the same problem still happens in IE, where when it parses the files individually it's not taking into context the file/variables that came before, so it's not an out of load order problem.

My options a

1) collapsing all the functions in gameLibrary.js and variables in gameSetting.js into one file. However, this is not practical because this is dealing with literally hundreds of games, and having a gameLibrary.js in ONE location for ONE update is what makes most logical sense.

2) figure out a way to get this to work where variables in file1 are accessible to file2 in IE (as it seems they are in other browsers).

jQuery seems to be able to have multiple plugins that all refer to the based jQuery-1.3.2.js, so I know there is a way to get this to work.

Help appreciated.

Nero

Hi, Ive got a iphone based website im writing in html/javascript, it all works perfectly well apart from an issue with a javascript variable and i cant figure out what im doing wrong

At the start of the code i declare a variable

var jpgname='blank'; - its blank for testing


I then have a href which attempts to change this variables value when clicked

<li class="flip"><a onClick="jpgname='test'" href="#page">Cars</a></li>

If i replace the jpgname='test' with confirm('test) i get a popupbox so i know its running this code

under my #page section (just a div named section) i have

[<h1><script>document.write(jpgname);</script></h1>

however this always has the value 'blank'

Im sure im doing something stupid but im not sure what

Any help gratefully recieved

thanks

Mike

Hi,

I'm looking to use the document function in javascript to change the TYPE of an INPUT.

However I want to change the TYPE of the INPUT according to a variable passed to the javascript button, so i use:

document.formname.inputname.value="newvalue";

I want to be able to change what inputname is depending on what is passed to the function, but right now firefox is telling me that it's undefined.

Is there any way I can do this?

Thanks in advance,

Daniel

I am perplexed about this one.
Not sure if php is the best solution or maybe javascript.
( or both.)

I am writing a litle script that will go to my mysql table and take out
20 rows ( from about 10,000 rows ) based on the WHERE statement.

Then I want to step through these 20 rows displaying
just two filds in this fashion:

First, I want to display one field in a "box" ( using divs and css )
then wait for a form input.
Then while keeping the first displayed box and field
display the second field in a similar box a fee lines below.
Wait for a form input
update some data.

Then onto the next row.

If I use javascript then I could keep all the processing on one page and not have
to have server refreshes.

But how do I get these those array elements from
$row['field1'] and $row['field2'] into javascript vars ?

Is this the best way to do this ?

Or would php and having a couple of extra trips to the server
for form processing be better ?

Thanks for any input.



.

Hi,

I hope someone can help me!

I have a list of buttons, each with a different id which is taken from the ids of these values from the database. When I click one of the buttons it shows the items that correspond to this id in the database. Therefore, when different buttons are clicked the display changes to match the objects relating to this particular button.
When a button is clicked, this shows various other objects which I can then select (using a checkbox). When a checkbox is clicked, a Javascript function is called to change the html text next to the appropriate button.
However, I can't get this to work as I need to pass the id of the button, and the html span, to the Javascript in order to change the correct text.

Here is my Javascript :

Code:

    function questionnum(checkbox) {

        if(checkbox.checked) {
        
        
		 	
            var qdesNumElement = document.getElementById('<?php echo $q;?>');
          
            var qdesNum = qdesNumElement.innerHTML;
            qdesNumElement.innerHTML = ++qdesNum;
            

    }

This code only gets the last button.

Please help.

Hi

is it possible to compare 2 php variables with javascript and hide-show a div according to the result?

lets say php variables are

Code:

$a
$b

and if ($a > $b) show the div

can anyone please help me to do this?

Sorry for language errors

Thanks

How can I have global variables and global arrays whose value(s) can be modified and accessed by all the Javascript functions in my HTML document as well as by the HTML code?

Thank You
CGG

Hello
Im using javascript and cookies to send to another page in my site some variables

In the other page i recieve them like that :
Code:

<script language="JavaScript"> 
if (widget_array != ""){
for (i=1; i < widget_array.length; i++){
document.write("<h3>" + widget_array[i] + "</h3>");
}//ends diplay FOR
}//ends widget display
 
if(ninja_array != ""){
for (i=1; i < ninja_array.length; i++){
document.write("<h3>" + ninja_array[i] + "</h3>");
}//ends FOR
}//ends ninja display
</script>

Now my question is ....(and this is the php - sql question)
how can i make the variable the i passed to stay a variable , e.g.

variable page 1:
id=123
*i entered the number 123 into the cookie
variable page 2:
now this page will show me ALL the array ( 123...134...156...etc...)
but i dont want it to print it on the screen i just want to get variables that i can use php-mysql
e.g. $id=123
in order to print the specific data from my data base

hope u got it....

Danny

Hi,

I am using javascript to collect hidden form elements and then send the values to a php page, without reloading or changing the page. Basically i have a list of job vacancies, with just an apply button, when a person clicks on the apply button, the form collects some information from their account and sends it using the javascript code.

Now this works fine, except for if somebody then clicks on the second job it sends the information from the first form again. And it seems to remember the information.

What i am trying to find out is it possible to have multiple forms on one page which once submitted send variables to javascript which then send them to a php but clear themselves so that it doesn't remember the previous values.

Here is the code for the form:

Code:

<form id="submit" method="post">
                            <fieldset>
                       <input type="hidden" name="usern" id="usern" value="php variable" />
                       <input type="hidden" name="joborder_id"  id ="joborder_id" value="php variable" />
                       <input type="hidden" name="site_id"  id ="site_id" value="php variable" />
                       <button class="button positive">Apply For This Job </button>
                       </fieldset>
                       </form>
                       <div class="success" style="display: none;">Your Application has been sent.</div>
                              &nbsp;
                            </form>

And the Javascript code is he

Code:

$(document).ready(function(){
	$("form#submit").submit(function() {
	// we want to store the values from the form input box, then send via ajax below
	var usern     = $('#usern').attr('value');
	var joborder_id    = $('#joborder_id').attr('value');
	var site_id    = $('#site_id').attr('value');
		$.ajax({
			type: "POST",
			url: "apply.php",
			data: "usern="+ usern +"& joborder_id="+ joborder_id +"& site_id="+ site_id,
			success: function(){
				$('form#submit').hide(function(){$('div.success').fadeIn();});

			}
		});
	return false;
	});
});

Any ideas or suggestions would be appreciated,

Thanks

Lee

I am about to translate some C++ code to JavaScript.
In C++, it is straightforward to declare and use a Boolean variable; all I do is swap it between true and false and back again as needed.
For example,
Code:

// C++ Code
. . .
bool na = 1;
. . .
na = !na;

. . .

I am wondering if JavaScript offers boolean variables. As far as I know, it does not, but I thought I would confirm by asking around.

At the moment, I am planning to code the comparable block in Javascript using an "if" statement or a ternary operation.
For example,
Code:

JavaScript Code
. . .
var na = 1;

// Option 1
if (na) na = 0;
else na = 1;

// Option 2
na = ((na) ? 0 : 1);
. . .

Is one of these options recommended as the best way to simulate a boolean variable and operation? (I would like the fastest-executing code possible.) Or is there another--better--way to do it?

All advice and recommendations appreciated.
Thank-you in advance.

I have jQuery like:
jQuery(".forms_1_1").validate({

rules: {
inputname1: {
required: true,
},

or
inputname1: {
required: "Requested field!.",
},
Is it technically possible to add
1. PHP variable like $_SESSION and
2. Smarty variable into Javascript like {$global.variable1}

inputname1 is value for each variable (PHP, Smarty).

Need help how to include variable values into Javascript code.

Hi, in PHP I can assign a variable do...
PHP Code:
function setvar($anyvar,$val){
    $$anyvar=$val;
}
setval('myvar',$whatever); 


how to do in javascript ... I thied window.anyvar= and this[anyvar] and several other combinations but no joy

Edit:
fixed, my bad, was being a muppet, was calling setvar(varname,val) instead of setvar('varname',val);

I'm working on this website and some contents are set up in arrays. How do you refer variables to work with arrays. I need the correct syntax.