Suppose I have global variables: x1, x2, x3
and I have a function that needs to assign a value to a new global variable
x4
something like
function foo ()
{
count = 0;
do {
count ++
varname = 'x'+ count
} while (globalExists (varname)
eval ( varname + ' = "I am new in the x-series" ' )
}
how would the function globalExists () be implemented ?
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?
View 1 Replies View RelatedI have some code that does this:
function openWindow(windowName){
timeStamp = new Date();
var timeStamp = timeStamp.getTime();
document.getElementById(window).style.display = 'block'
}
blahblahblah . . .
openWindow('order'); // calls openWindow function and sets timeStamp variable.
alert(timeStamp);
then I get error: timeStamp is undefined. Why? I defined it as a global variable within openWindow. Am I just doing this wrong?
I`m building a site with html and GIF files on one server and audio files on another. That means I have to use absolute references to the audio files.
Problem is, the site will probably dwell some day in other server(s), and may also use a different audio format. I like to be able to globally change url strings and suffixes of the referenced files.
I think I can`t use "base href" because relative references (to files that are on the local server) would be affected.
The code looks something like this:
<a onclick=document.all.music.filename="URL/FILENAME.ZZZ" ...
I like to set "URL" and "ZZZ" on a separate file.
I prefer to keep all my scripts in an external '.js' file. I am currently loading the external '.js' file from the header. Problem is I would like to declare a global variable in the external file, but I keep getting an error about the object does not exist.
Can someone tell me where or how to declare a global variable in an external file that is available after the page is loaded.
Is there a way to "pass" an XMLHttpRequest object to the callback
function for onreadystatechange? Or a way to access it from
onreadystatechange? I would like to avoid the use of a global
variable...
Example:
/* How do I get rid of this global variable? */
xmlHttp = new XMLHttpRequest();
function myFunc()
{
...
xmlHttp.onreadystatechange = myCallBack;
...
}
function myCallBack()
{
if (xmlHttp.readyState != 4)
{
return;
}
...
}
Any ideas?
Here's my code:
//document.write("Test");
//Declare arrays
stats = new Array(6);
statMods = new Array(6);
/*
//Populate stat and statMod arrays
[Code]...
without first calling the other function that actually assigns values, it still works. As I said, though, if I assign values outside that function, then it all falls apart.
I've googled this and found a few different explanations that (as a PHP developer) are making absolutely no sense to me. I'm a total beginner with Javascript (not just jQuery) so a little help would go a long
[Code]...
i am having two global variables and i m setting their values on calling some function. After setting the values, i call a function in an object ...
if MyHint is an object and i am calling the function in it, but i am getting the values of global variables as undefined in the function of object MyHint. Is there any way to access the value of the global variables.
I'm new to javascript, but I need help and really hoping for a reply. I was trying to find an answer in Google but no result. So I have two table containing images, at the beginning only first table is displayed. Then when one of the images in the first table is clicked, a second table should appear, and user should click one of the images on that table. And that image should replace the one that was clicked originally in the first table.
So the question is, when the user clicks an image in the second table, how do I know what was originally clicked in the first one? I tried to use global variable but that doesn't work.
I am totally new to javascript..
1. I am taking data by opening text file from the server using javascript XMLHttpRequest
2. Using that, i am planning to plot data....
In the following code , i am setting global variable inside for loop .
[Code]...
I cannot findout how I can write to global variables in a a JQUERY function.
<script type="text/javascript">
function checkusername (username ) {
$.post("[URL]", {
action: 5, username: username },
function(xml) {
result = $("apot", xml).text();
//<-- this variable is not global... why ??
message = $("message", xml).text();
//<-- this variable is not global... why ??
alert(message); //<--here variables are shown ok
alert(result);
});
alert(message);
//<--here variable is NULL !!
alert(result);
//<--here variable is NULL !!
}
</sctipt>
I'm having trouble letting functions I defined in jquery read javascript global variables I defined elsewhere.. for example I have a function defined within my jquery
$(document).ready(function(){
function performTabSlide() {
// do something with currentPosition;
[code].....
i have this problem in passing values to a variable in a jquery function.
i have a js variable that accepts a certain value and then i want to pass this variable in the jquery function.
For example, this is my script:
var autoScrollBool = "true"
var autoScroolInt = "10" (seconds)
stepcarousel.setup({
[Code].....
i want to replace the value of autostep: {enable:true to enable: utoScrollBool(the variable i created) , when i tried to assign it as is, its not working.
I have an HTML page which loads another page inside an IFrame. Each of the two pages has its own javascript code.
I would like to be able to define one global variable which will be accessed from functions in both scripts. The variable must be single. That means that if a script in one of the pages changes it, the change will be seen by the scripts in the other page.
I have an external js file used by an html page but I want to use global variables defined in the html page in the js file. for example...
<html>
<head>
<SCRIPT type="text/javascript"
var test = "1";
</SCRIPT>
<SCRIPT type="text/javascript" src="jscript.js">
</SCRIPT>
</head>
So I have var test which is defined in my .html but my jscript.js also uses the variable. I am doing it this way because I have a lot of pages that are simular using the jscript.js functions but each page has different quantities and values of variables used.
I'd like to move the global variables vertexBlaBuffer to the scope of the Geometry prototype [code]...
View 1 Replies View RelatedI've got a function displayResults(imageArray); that first calls removeElements(); to get rid of the currently displayed list items. Both functions are part of class function eventBox(array, string, date). both displayResults(imagearray); and removeElements(); have been bound to eventBox(); by e.g. this.removeElements = removeElements;
However, from within displayResults(imageArray); this.removeElements(this.identifier + "eventsul"); evaluates to "undefined". Also, this.identifier called from within the function also evaluates to undefined (it doesn't in other functions). For some reason I can't access global functions and variables from displayResults(imageArray);. Any ideas?
Here is the code for displayResults(imageArray); :
//<input type="text" id="s_field" value=""/>
var valid = true;
var div = $("#s_field");
$.post("index.php",{id: 6}, function (data){
[Code]..
When posting data, and getting response need to set valid to false - email is not valid.
1. in function it alerts valid is false
2. outside function it says valid is still true!
even i didn't wrote var valid = false;, but valid = false;I need to set Global "valid" variable to false.
I have the following HTML code which is doing a GET to a page, say
MyUrl.aspx :
<body>
<form name="form1" method="get" action="MyUrl.aspx" id="form1">
<input type="hidden" name="ClickedElement" id="Messenger" />
</form>
</body>
where the the Submit() is done within a javascript function invoked at
onclick on some element.
My question is: How can I prevent form submission when MyUrl.aspx is
not available? The javascript function is:
function Clicked(MyControl)
{
var _CellContent = document.getElementById("Messenger");
_CellContent.value = MyControl.id;
document.form1.submit();
Is there any possibility to check the existence of XML?
View 2 Replies View RelatedHow do I check if a certain word exists in a text box? For example, if I set the word to be found to "word1", if the text box is "This is word1", and alert would come up saying that "word1" was found.
View 2 Replies View RelatedI am creating this Javascript/XML HTA that is basically a project tracker. I recently added some new fields in the form that are written to the XML file for the project being tracked. This makes the files neither backwards compatible if I use it in a previous version nor forward compatible for future versions. This means if a user is using version 1, I create version 2, he wants to import his old tasks to Version 2, it throws an error. For example if I have a <status> element written in the newest version, but no <status> in the previous, I can no longer use that projects XML file in a previous version.
I tried to use the following code to validate existence of the tag and assign whatever outcome as the variable to write, but it's not working. Theres a few different ways I tried.
1st Way:
Code:
2nd Way:
Code:
3rd Way:
Code:
Here's the XML file for reference.
Code:
Is it possible to check for the existence of an element? I have a dynamic
page which may or may not have a <div> holding a bunch of thumbnails, and I
want a function to check for the existence of the <div>. Doing:
blah = getElementById("thumbnails");
Generates an error.... I was hoping it would just return false or
something... Is there a way of doing this?
I'd like to be able to toggle the existence of a DIV using the onclick attribute.
HTML Code:
<input type="radio" value="1" checked="checked"
onclick="document.getElementById('div').style.visibility='hidden';"> 1
[code]....
I have the following code:
Code:
<script language="javascript">
<!--
// Max number of items to show/hide
[Code].....
Which is designed to hide all but one of a group of DIVs with consecutive IDs in the form "listings_stations_<number>". The problem is, I won't know how many of these DIVS there will be. I know a maximum possible number though.
The script as-is works, but obviously throws up errors trying to get handles to non-existent elements/objects. How can I check an element exists before getting and setting style properties for it? I'd like a solution that works for all three browser-types the script currently works with.