Inter-frame References
Jul 20, 2005
Apparently, there is a page with multiple frames, where one of the
frames is a "hidden" frame, and is there just to contain one or more
"fields" that are referenced from other frames.
Supposedly, if a user "sits" somewhere in this set of pages for
several minutes and then tries to do something, the page redisplays,
but an inter-frame reference (to the "hidden" frame) fails with some
sort of a "No permission" error. If the user navigates through the
site with no real delay, they don't see this problem. This is the
situation I need to understand.
I'm assuming that the "No permission" error occurs when a frame that
was obtained from domain "foo" tries to reference a frame that was
obtained from domain "bar" (I'm not sure of the correct terms in the
context of JavaScript). Under normal operation, all of the frame
contents are obtained from the same domain (I believe).
My theory is (without much information yet) that there must be a
proxy/cache server in between. When the user navigates through the
site with no delays, all of the frames are obtained from the same
server (either the cache server or the target server, I don't know
which). However, when the user "sits" for a while, I'm guessing that
the cache server hits a content timeout, and a redisplay of the page
causes one frame to be obtained from the target server, and one from
the cache server.
Does this seem like a reasonable explanation for what we might be
seeing? What are useful strategies for fixing a problem like this?
View 1 Replies
ADVERTISEMENT
Jan 22, 2010
This may seem like an odd question but I was wondering if there was a way to use javascript to dynamically inter space characters in a string with other characters.
Basically i would want to take this:
"This is a string"
and replace it with this:
"T.h.i.s. .i.s. .a. .s.t.r.i.n.g"
I know it seems strange but I have my reasons
View 2 Replies
View Related
Jul 23, 2005
Is it true that Javascript has no clone() method, to pass an object by copy of value instead of reference?
If I have an object and want to make an array out of all of its instance variables, I can loop through it and pass its values to a new array, and the class instances will be passed by copy and not by reference?
Example 9.3: References Themselves Are Passed by Value
// This is another version of the add_to_totals() function. It doesn't
// work, through, because instead of changing the array itself, it
tries to
// change the reference to the array.
function add_to_totals2(totals, x)
{
newtotals = new Array(3);
newtotals[0] = totals[0] + x;
newtotals[1] = totals[1] + x;
newtotals[2] = totals[2] + x;
totals = newtotals; // this line has no effect outside of the
function.
}
Note that this rule applies not only to pass-by-reference, but also copy-by-reference. You can modify an object through a copy of a reference, but changing the copied reference itself does not affect the object nor the original reference to the object. This is a more intuitive and less confusing case, so we don't illustrate it with an example.
View 5 Replies
View Related
Oct 23, 2005
I'm currently engaged on a dissertation which is
investigating AJAX technologies and I was
wondering if anyone had any references that might
shed light on the subject?
I will of course carry out a literature review but
in the mean-time has anyone any (preferably print
based) sources of data on AJAX?
View 9 Replies
View Related
Dec 17, 2005
I am a bit new to JavaScript objects, I have the following object:
LinkTest=function() {
// init
}
LinkTest.prototype.eventHandler=function(){
// the call below fails, as 'this' refers to the link that
// generated the event, and not the instance of LinkTest object
this.doSomething();
}
LinkTest.prototype.register=function(link){
link.onclick = this.eventHandler;
}
LinkTest.prototype.doSomething=function() {
// do something!
}
So basically when you register a link, the onclick event handler gets a reference to LinkTest's eventHandler function. Now when the user clicks on the link, the 'this' refers to the link... how do I reference the instance of LinkTest object from within the eventHandler function?
View 2 Replies
View Related
Jul 20, 2005
I discover a strange bug in Konqueror 3.1.1.
I design a javascript application which acts in one file called
example.html. At the beggining of this js i write:
if (document.images)
{
folderopen= new Image(16,16);
folderopen.src="http://www.sergioamo.8m.com/buttons/folder_open.png";
folderclose= new Image(16,16);
folderclose.src="http://www.sergioamo.8m.com/buttons/folder_close.png";
}
functions....
....
...
..
and my javascript works perfect.
If i write:
if (document.images)
{
folderopen= new Image(16,16);
folderopen.src="./buttons/folder_open.png";
folderclose= new Image(16,16);
folderclose.src="./buttons/folder_close.png";
}
functions...
....
...
..
my javascript does not work properly. Does anyone knows if is imposible
to use relative references with konqueror 3.1.1 or which is the problem?
View 2 Replies
View Related
Aug 26, 2011
I have a domain: example.com; which is the parent.And a subdomain: api.example.com; which page 'receiver.html' is being loaded in an iframe, child of parent. Both pages set document.domain = example.com.
I'm trying to adapt this code:[url] but Idon't want to load jQuery from the <iframe> again but I need to have the method $.ajax() working from the <iframe> otherwise it would be a cross-domain request and the browser would abort it. I tried ingenuously to set via $('iframe')[0].contentWindow.$.ajax = $.ajax() and I just got a shortcut to the parent page jQuery method. I also tried to "clone" it using $.expand (true...) but the method doesn't work for me; probably because of the complexity of the objected I'm trying to clone. So is there a way for me to use jQuery to have only a $.ajax() method in the <iframe> ? I've thought even about creating a XHR in the child-iframe and then use that in the $.ajaxSetup ({xhr: THATNEWXHR}) but I couldn't do it. I mean, I want to use the XHR factory from jQuery (which has fallbacks for IE, etc) but it has to be created from the iframe-child.
Maybe there is other way to make the AJAX call come from the child-iframe.
If you're wondering "why don't you load jQuery from <script> in the child-iframe", there is a reason... As I'm using jQuery plugins + my own custom javascripts + other independent scripts I created a compiler which minifies each file and bundle them in one. The advantage of this is the reduction of HTTP requests. So "why don't you load that bundle inside the child-iframe?", because it's ugly and Twitter doesn't... Yeah, I like to take Twitter as a reference and I think if they were able to make it so can I;
I got to work in most browsers except IE and Operaby doing it with pure javascript.
I'm "attaching" the code for you guys to test. If you open it with Chrome, Safari or Firefox you will receive 2 alerts one with the return of $.get() and another with the return of a request made via XMLHttpsRequest object. Otherwise (if you open it with IE or Opera) you'll get 'undefined' in the first alert but the real return in the second.
This is the example.com/index.htm:
View 4 Replies
View Related
Mar 9, 2003
I am trying to make a function that checks/unchecks a checkbox when a specific <td> is clicked. I need to use this same function for several checkboxes in the page so I want to just pass it the name of the checkbox I want to affect as a variable and use it in the object reference lines. BUT, this doesn't work. I can pass the variable to the function as I've used alert(variable) to test this. But it doesn't work when I put it in a line like this "document.forms[0].variable.checked=true;". Code:
View 4 Replies
View Related
Dec 5, 2010
is there a way to shorten something like:document.scoresheet["HomeTotalHCaps"].valueto a simple short name like var1.value ?
View 8 Replies
View Related
Oct 15, 2001
Im trying to make a back button that reloads the previous page the user was at.
The back button will be on a small top frame and the page that needs to be controlled will be in the main frame.
The top frame is just a navigation system, and all pages will be loaded in the main frame.
Im trying to use this Code:
<FORM>
<INPUT TYPE="button"
NAME="back"
VALUE="BACK"
onClick="history.go(-1)">
</FORM>
Does anyone know how I could accoplish the desired result using this code, or any other code? And what about a foreward button?
View 2 Replies
View Related
Feb 27, 2007
THE QUESTION: How do I get a reference to my Object when processing an
event handler bound to an html element ?
CONTEXT:
Sorry if it is a bit long.
I am developing a JS calendar tool. One of the requirements is that the
calendar will need to display a varying number of months (1..3)
depending on the calling page. Imagine 1, 2 or 3 calendar pages side by
side as required.
I have built a grid object that will contain one month's dates with the
day names at the top. The calendar object inherits the grid object as an
array of "calendar pages" - one grid per month and the calendar provides
the content for each grid. I will use the grid object for another
completely different object later and so I want to use good OOP
encapsulation. The grid is a table generated on the fly and is "dumb" as
far as what it is used for.
I have attached an onlick event to each cell of the grid. Using OOP
priciples I want the calling program (the calendar object in this case)
to provide a function to handle the click and the grid object will
provide to the calendar the row and column of that cell as well as the
grid number (so the calendar can work out which date was clicked since
it knows what the data means and the grid doesnt). Code:
View 6 Replies
View Related
Aug 11, 2009
I'm working on a project that I want the user to be able to change the color theme of the site. For some reason if I go over about 20 themes or css references it breaks the site. Any idea why this is? if so, how can I get it to accept say 50 themes?
View 2 Replies
View Related
Aug 22, 2010
I have some confusion about the scripts below:
1) is getRule a local variable or global variable, as it has no var keyword, yet it is an inner function of Validation? So without var, I think global, but being an inner function, I think local. So I'm not sure which.
2) In this line of code: var rule = $.Validation.getRule(types[type]), getRule returns rules, which is just a local variable in Validation. I always see that you return functions, but how does returning a local variable that's just an object literal and not a function be able to return true or false? Now the value of rules is an object literal, and this object returns true or false. So we are basically allowed to use return keyword with local variables that are object literals and not functions?
3) In this line, is foo(age) being called, or is it just being assigned to bar OR is it being called and THEN assigned to bar: var bar = foo(age);
4) Now for the most confusing: age is obviously an object reference as opposed to a literal in the example. Does that make a difference in regards to closures?
Note that I read a number of books, including JavaScript Programmer Reference and Object Oriented JavaScript and jQuery cookbook, which compare primitives vs reference types and how primitive types store directly in memory whereas reference tpyes reference memory, so if one reference changes, they all change where primitive remains ingrained. But when assigning a function as a reference like this, how does that affect the object "age" when passed into bar?
Code:
(function($) {
/*Validation Singleton*/
var Validation = function() {
var rules = {
email : {
check: function(value) {
if(value)
return testPattern(value,".+@.+..+");
return true;
}, .....
$.Validation = new Validation();
})(jQuery);
Code:
function foo(x) {
var tmp = 3;
return function (y) {
alert(x + y + tmp);
x.memb = x.memb ? x.memb + 1 : 1;
alert(x.memb);
}}
var age = new Number(2);
var bar = foo(age); // bar is now a closure referencing age.
bar(10);
View 3 Replies
View Related
Jul 20, 2010
I want to have a main image in place and when you click on 1 of the 3 frame options the frame changes showing a preview. Also I would like the add to cart button change its code to add the correct item as well.
View 2 Replies
View Related
Sep 20, 2006
I've spent several days trying to work this out. Maybe I'm just
searching for the wrong keywords/phrases.
I have some code that looks like:
[-- snippet starts --]
Console = new Object();
Console.init = function() {
this.STDIN = document.getElementById('console0_stdin');
this.STDOUT = document.getElementById('console0_stdout');
// set styles on the element references, eg:
this.STDIN.style.width = �`%'
this.STDOUT.style.width = �`%'
}
Console.focus = function() {
this.STDIN.focus();
}
Console.writeln = function(buffer) {
this.STDOUT.value += "
" + buffer;
}
[-- snippet ends --]
I'm not sure why, but the Console.focus() and Console.writeln() methods
just don't seem to be able to use the DOM references stored in
Console.STDIN and Console.STDOUT. Everything's fine in the
constructor, but other methods can't seem to use them.
View 8 Replies
View Related
Sep 19, 2010
My site's working perfectly in the other browsers, and when I delete line 28 (see below) it works in IE but not exactly how I want. Is there a way to retain two jquery references on a single page in IE?
This is the head section of my code:
View 3 Replies
View Related
Jan 29, 2009
Is it possible to test whether two objects are equal using the data they contain inside and not comparing their pointers with ==?
Well actually of course there is but...
Is there a way to do it without actually looping through the object, instead maybe something that came with JS? (something like a .equals() method from other programming languages.)
View 5 Replies
View Related
Oct 16, 2010
I am confused about the true difference between the two below examples.
first example:
// Demonstrating a problem with closures and loops
var myArray = [“Apple”, “Car”, “Tree”, “Castle”];
var closureArray = new Array();
[code]....
Here we iterate through the length of myArray, assigning the current index of myArray to theItem variable. We declare closureArray 4 times as an anonymous function. The anonymous function in turn declares the predefined write() function, which is passed parameters. Since write() is in closureArray() a closure is created??? During each iteration, theItem is reassigned its value. The four closures reference this value. Since they reference this same value and since this value is reassigned ultimately to the value of the fourth index position, tHe time we execute closureArray later on, all four closures output the same string. This is because all four closures are within the same scope "the same environment" and therefore are referencing the same local variable, which has changed.
I have a couple of problems with this example:
1) I thought a closure is a function that is returned - the inner function is not returned above.
2) theItem is not even a local variable of the parent function (closureArray) - I thought in order for a closure to work, the inner function only accesses the local variables of the outer function, but in this case the local variable is defined OUTSIDE of the parent function.
3) the "the four closures are sharing the same environment." The thing is even in the second example, they are sharing the same environment.
Second example:
// A correct use of closures within loops
var myArray = [“Apple”, “Car”, “Tree”, “Castle”];
var closureArray = new Array();
[code]....
Here we iterate over the length of myArray (4 times), assigning the index of myArray to theItem variable. We also return a function reference to the closureArray during each iteration (closureArray[i]), where i is index number so we assign 4 functon references. So when we iterate through myArray, we immediatelly call the writeItem() fucntion passing an argument of theItem at its current value. This returns a child anonymous function and when that child function is called, it will execute a block that calls the predefined write() method. We assign that returned anonymous function to the variable closureArray. Hence, closureArray holds a reference to that anonymous function. So closureArray during each iteration holds a reference to the anonymous function and we later call closureArray, which in turn calls the anonymous function, therefore calling the predefined write() function to output the local variable of the parent function. This outputs each distinct index of myArray.
This is because since we created the closure, when we call writeItem, passing theItem argument, since theItem is a local variable of the parent function of the closure, it is never destroyed when we later call closureArray (the reference to the child anonymous function)? Yet weren't we using a closure in the first example as well? So whey wasn't those variables preserved?
I don't think it has anything to do with assigning a returned anonymous function to closureArray. Even though an anonymous function creates a new memory position in the javascript engine, therefore not overwriting the other function references we create during the iteration, it's still referring to a local variable declared outside the reference. So if it's about the closure retaining value of parent's local variable even after exiting the parent function allowing for the current indexes to be preserved, then why did the closure in the first example fail to retain each index?
View 7 Replies
View Related
Aug 30, 2010
i need to pass the data in the textfields from the left frame to the textfields in the right frame of my frameset. (ex: dslnum of frame1 will be pass to txtDSLTN of frame2)[URL]
View 19 Replies
View Related
May 22, 2011
I have two frames (frameset, let's call it frame1 and frame2). Frame1 has links..., and frame2. When some link in frame1 is clicked, it must be changed content of the frame2. Here's example: click. How to do that? (I don't see any javascript code)
View 2 Replies
View Related
Jul 19, 2006
I have a parent document that has a frameset with two frames in it. The first frame is a "header" that runs across the top of the site, and never changes. The second frame contains the "content" of the site. Essentially, I am trying to figure out how to prevent the header appearing above external sites when the user clicks an external link in the "content" frame.
Every time the content frame changes to a new URL, I would like the check that URL and determine if the content frame is changing to an external URL (i.e. different domain in URL) or to an internal link (same domain in URL). If the content is changing to an external link, I want to break out of the frame and just load that external link in the top most document.
I would like all of my javascript to be in the parent document, not spread throughout the individual pages of the site. I was trying to approach this by setting the onunload event handler of the content frame, but I am left with a couple of specific questions:
1. In handling an unload event, can you determine the next URL that the document is loading? Code:
View 6 Replies
View Related
Jan 10, 2011
I have a little problem, I structure my site with a main page index.html with a frame in the central whit name CENTRALE, so every other page I will open within this frame. Now I need to have a direct link to these internal pages, give an example I wish it were possible to go to the page clothing giving a direct link to that section of the site type www.indirizzo.com / clothing.html because the state of things if I take the 'direct address to that page I open only the part inside of the frame, but I wish I would open inside the "main frame, there is a solution in javascrip to overcome this problem?
View 4 Replies
View Related
Sep 8, 2010
I have a frameset with two frames; topFrame and mainFrame. I have code in topFrame and wish to print the contents of mainFrame. The code that I have used has worked for many years and still works on my localhost Apache Server. However, it has now "stopped" working. When I press the button in topFrame it prints the contents of topFrame The code that I am using is
Code:
window.parent.mainFrame.focus()
window.print
I have tried to replace the first line with..
[Code]...
View 1 Replies
View Related
May 13, 2009
I use dreamweaver mx html editor to make web sites. I think I know enough Html to get by. My new site uses a frame set so the head and controller don't change reload or move. This works nice, now all I have to do to make a new page is make the content page. But my problem is if I send out a link for someone to look at, it only loads the content page and not the frame set. I thought I could use javascript to determine if the frame set is present and if not load it. But I can't seem to find a way to sent variables from one frame to another. Also if a user clicks a link I would like my flash controller to reflect it.
[Code]...
View 1 Replies
View Related
Aug 9, 2004
I need to know how to refresh a bottom frame TO a specific dynamic URL from my top frame (meaning the code has to be in the top frame) say every 5 seconds. The top frame will be a php file as I need DB values. But I believe the frame thing is done via javascript. This ain't working so far, it only loads the first URL at not the rest. Is there the ability to refresh to a specific url in a target frame. Code:
View 5 Replies
View Related
Feb 19, 2009
One more question about manipulating iframes. In a script I've looked through to investigate AJAX file uploads, there is this technique for accessing the contents of an iframe:
Code:
if(frame.contentWindow)
{
var thebody = frame.contentWindow.document.body;
}else if(frame.contentDocument)
{
var thebody = frame.contentDocument.document.body;
}
I haven't been able to find much info on contentWindow and contentDocument. In fact, other sources I've found talk only about using contentWindow to access an iframe's contents, ignoring contentDocument completely. What is the difference between the two, and what browsers is the contentDocument check targeting? Any modern browsers, or is this a backward compatibility thing?
View 8 Replies
View Related
