I'm confused about declaring variables. I see variable explicitly declared with the keyword var, both inside and outside of functions, and I suppose that depending on where it is declared relates to variable scope. BUT, I also see variable used that have not been explicitly declared with var. What determines if a variable needs to be declared?
View 4 RepliesI have a situation in javascript where (this is inherited code, so I gotta deal with it) a variable is being used without being declared, as
someVar = someExpression ;
The original developer was relying on IE which automagically creates javascript variables for the IDs of all HTML elements, so somewhere in the HTML, there's
<someTAG id='someVar' >blah </someTAG>.
Unfortunately, in Mozilla (Firefox), I get a javascript error indicating that 'someVar' is not defined.
I wanted to check to see if the variable was undefined, then define it
if (undefined == someVar) someVar = document.getElementById("someVar") ;
this gives the same error in Mozilla (undeclared variable). I saw a thread with this exact problem, but it looks like its been archived. Does anyone have the solution to checking in javascript if a name is "undeclared" as opposed to "undefined"???
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.
Does anyone know how to list all declared variables in JavaScript ?
View 4 Replies View RelatedI need a way for a html page or something similar be able to determine what it's full path is. It must self-determine this. Any recommendations of what route I should take to figure this out?
View 2 Replies View RelatedIm trying to write a program that determines if an array is Ragged or not.
document.writenln("Ragged or not<br />")
if (raggedOr(a))
document.writenln("Array is Ragged");
[code]....
I have a successful php-based login screen for users. There are two radio buttons the user can select.
1) Login into Account Page (on my server).
2) Login into Affiliated Page (not on my server -- another website).
Now by default the radio button for the Account Page is selected. My question is, if the user selects the second radio button, how do I tell the form to now process the username/password for the affiliated site?
Currently, the action attribute in the form tag is set to "process.php" when the first radio button, Account Page, is selected. No big deal there.
But when they click the second radio button, I need the action attribute to process on the affiliated website by sending the username and password to this page: "http://www.affiliatepage.com/process.aspx"
So the issue is how does the login page know which form action to take?
Do I need to create two forms? If so, should the form for the Affiliate Page login be hidden? Code:
I just started a programming class and stuck in a section of my assigment. Last instruction: "Write a script that reads an integer and determines and output XHTML text that displays whether it it odd or even.{hint: use the remainder operator. An even numder is a muiple of 2. Any multiple of 2 leaves a remainder of zero when divided by 2.}
View 1 Replies View RelatedI 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.
Ok, so I've built a member search using ajax to change the results each time a filter is changed. It works great, except one minor issue that I'm struggling with...I just can't specify dynamically in the parent file that linkclass$id opens linkclasscontent$id as I don't know of any way to pass that $id variable back over to the parent.
View 3 Replies View Relatedi'm not really sure how to explain this, since I know nothing about javascript, so i'll try and illustrate by the use of php (hope it makes sence)
I have a set of different links, like:
<a href="link.com?page=text1">text 1</a>
<a href="link.com?page=text2">text 2</a>
<a href="link.com?page=text3">text 3</a>
etc, where page is dynamic and can be anything I chose..
Another place in the same document, I echo out what the page variable is, like:
echo "$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?
a.) specify two parameters for the changeYear function: today and holiday.
function changeYear(today)(holiday){
b.) in the first line of the above function, use the getFullYear() date method to extract the 4-digit value from the today variable and store the value in a variable named year.
first line
c.) in the second line; use the setFullYear() date method to set the full year of the holiday date object to the value of the year variable.
second line
d.) in the third line, use a conditional operator on the year variable. The test condition is whether the value of the holiday date object is less than the today date object. If it is, this means that the event has already passed in the current year and the value of the year variable should be increased by 1.
third line
e.) in the fourth line of the function, again set the full year value of the holiday date object to the value of the year variable.
Code:I am having problems with the following. I am wanting to hide <tr> in my table (employees) and only show employees that are in the selected department (selected via dropdown box).I need to set a javascript array to a php array. I am looping and assigning the array and am wanting to pass a javascript variable as the index in php array. I have marked my problem lines in red. Thanx for any help.
<script type="text/javascript" >
function display_elements()
{
var departments = new Array;
[code]....
I am simply trying to use a global variable in javascript, but can only access the variable on the second call. I can't find anything that relates to this through my searches. My application is supposed to query the server for XML that tells me which years and months are available to put into combo boxes. I want to store this xml in a global variable to access it later.
[Code]....
I start outside of the external JS file by: reviews.init(); reviews.initialiseContent('comment'); This loads my data and loads + sets the comment tab as default. My problem is that in the external JS file (shown below) the loadTabs variable will not allow me to pass it a variable: contentDiv.onclick = this.initialiseContent; Whenever I pass a variable here it errors, am I setting this up correctly, should I be using prototype for my this. variables? Interested to hear back on if this structure of code is the right way to go about this and also how I can pass a variable in this way :)
[Code]....
I am trying to define a variable as follows:
var music_id = $(this).attr('id');
var mix_class = $('#le' + music_id);
In other words, if music_id is mix3, I want mix_class to be #lemix3.The above code is not working for me and I would like assistance as to the syntax to produce such a result
I tried this code but i got an error on the it said Syntax error code...
View 6 Replies View RelatedI have a php page in which I declared a js variable... right at the top of the page...
<script type="text/javascript">
var tester = 0;
</script>
[code]....
I have a programing problem that have been around for ages. I have search on google using several expressions and words and after hours of digging i'm still unable to do it.I would like to get a value from a HTML page hosted remotely with an inconstant value. Then define this value and name as a javascript variable and apply or show in my page.P.S. Is there any way to make a domain lookup in javascript? I mean a user enters a domain and the script converts to an ip and shows to the user. If not thanks, probably it can only be done in the server side...
View 6 Replies View RelatedI want to load an html div in a variable, modify it in another variable; and then change the document injecting the contents.
1. I load the html to be changed in a variable (code)
2. I modify an attribute of <param> using attr() and I put the result in a var (newcode)
3. I change the html in the doc
I've used the debugger, and all steps give the expected results, except of newcode.html(), which is a null string. Why?
[Code]....
I have a javascript in the head of the document which has a variable named "ref2" ... ref2 is already working as I can see its value working in another function. I need to send this variable as the value of a hidden field in the form which is in the body of the document.
This is my JavaScript Code:
Code:
And at the end of my form, before the submit button, I have the following code:
Code:
When I execute the form, it doesn't work the way it should, plus, gives me a word "undefined" next to the "Submit" button .....
I'm trying to create an array of dates two weeks apart from an arbitrary startDate, and I've noticed some odd behavior in my variables. I did a little experiment on my JS console and here's what I got. My inputs are in blue, the output is in black.
Code:
Everything's good so far, but here's where it gets odd. I try to add 14 days to cur.
Code:
Why is it that when I make changes to cur, the same changes are made to startDate?
Is it possible to assign a javascript variable to a php variable without using forms?
I want to display the variable address where I have stored the users address which I got from the google maps geocode and I want to display it inside a div. code...
I want to add the values of several variables in one variable and then use this variable, which contains the values of variables
You can see the following example
HTML Code
PHP Code:
Javascript Code
PHP Code:
After executing this code I find that the variables are not displayed values
As in the following picture: [url]
I am creating a survey. I want to set a variable, which is sent to google analytics, as the current time. this is the code and works fine:
HTML Code:
<script type="text/javascript">
<!--
var d1 = new Date();
var curr_date = d1.getDate();
var curr_month = d1.getMonth();
[Code]...
I have a javascript in the head of the document which has a variable named "ref2" ... ref2 is already working as I can see its value working in another function.I need to send this variable as the value of a hidden field in the form which is in the body of the document.This is my JavaScript Code:
function WriteContactFormStatement1 () {
var ContactFormValue = ref2;
document.write('<input type="hidden" name="UReferrersName" value="' + ContactFormValue + '"
[code]....