When the return value of a function is another function like:
Code:
The normal method I've seen to invoke the returned function is:
Code:
In, JavaScript closure for dummies, in the 6th example the returned function is invoked using double brackets like:
Code:
This is working perfectly in firefox. This is the 1st time I'm seeing a function call like this.
Does this work in all browsers?
<button onClick="return popup('<span onClick='selectShape(1, 1, 1)'>test<span>');" tabindex=Ɖ' onFocus="setFocusColor(0,3)">....</button>
This will work perfectly, but as soon as I need to pass Strings inside the selectShape function, I get stuck.
So the question is, how can I create the following and have it working
......selectShape(2, 'Tricky', ཤx5°').....
I'm hoping that someone can help me with a question I have about javascript syntax.
I got an html page that uploads an image and some text field to a database.
What I'd like to do is modify the content of one of the textfields prior to it being submitted to the database. Specifically, I need to append the contents of one of the fields to another.
The problem that I've encountered is that the textfield name contains square brackets , ‘extra_fields[Price]'
I've identified the square brackets as being the problem by changing the textfield's name to one that doesn't contain square brackets ,extra_fieldPrice for example and the script works fine.
Unfortunately, in the real world application of this page, I can't change the textfield name.
The specific part of the html page that's giving me problems is:
I have the folowing string:
"url(http://www.somelocation/anaywhere/image.jpg)" stored in the variable
str_image and I want to extract the string between the brackets. I have:
ar_match=str_image.match("url([.]*)");
it returns
0=url
1=
How do I get this to work?
While trying to get a selector to work with ids that include square brackets, I searched the forum and found that I needed to escape the brackets with '\'. However, while this works with my fiddle: can't get the exact same selector to work within my page in either FF or Safari. I've triple-checked the id and it is correct; I know that jQuery is working on the page because changing the selector to$('.nameinput') gives the expected results. can't change the id because I'm working within an existing application; I know I could add a class to the input and use that as the selector instead. I'd prefer not to and would just like to figure out why this isn't working.
View 1 Replies View RelatedI do undersand the basic notation of jQuery selectors, but I don't understand what the [0] means in the following code snipet:
$("body").append(
$([
overlay = $('<div id="lbOverlay" />')[0],
[code]....
Any suggestions on how the javascript below should be changed so it will work with checkboxes that have brackets in the name? (I'm using foreach in php, and can't seem to get the php to work/work correctly without using them.)
View 3 Replies View RelatedCan't figure out why the pattern will match a period but not a square bracket.For example, it will match "See Jack run." but not "See [Jack] run.". Just ignores the brackets.
Code:
var title = note_title.value;
// validate periods and brackets
[code]....
I'm wanting a table cell click event to remove and replace the table it was clicked on, however I'm finding that as it's deleting the original table object the actual running event code is being replaced and the function is bailing.how I can call the delete/refresh function from outside the event's function scope?
View 1 Replies View Relatedhow I can accomplish wrappingrelevantparts of a script into a function then call that function within a success area on another page.
This is what I have so far: Script.js page - This page is longer but this is the relevant part that I would like to wrap:
$(".product img").draggable({
containment: 'document',
opacity: 0.6,
revert: 'invalid',
[code]....
I have just started learning JQuery and have a doubt in the below code. $.get('myhtmlpage.html', myCallBack);The doubt is should the 1st parameter of the get function be a HTML file or can it be a unction name?
View 1 Replies View RelatedI want to call java function in javascript.In which we pass one parameter to function and its returns String value which I want to display in alert message.
View 2 Replies View Relatedhow do I get the post data from html in jQuery which contains square brackets?
[code]........
I have a real perplexing issue. In two separate "projects" I had code that displayed checkboxes - when clicked, they would fetch information from a db and display it in the div below. I had code that displayed a jquery date-picker - when clicked, it would fetch information from a db and display it in the div below. My issue comes with this:
[Code]...
write JavaScript program for matching of parenthesis(opening and closing brackets) in a string
View 6 Replies View RelatedI have a document that can contain any number of iframes which have
further copies of the same document (and so on). In practice, we
shouldn't ever have frames within frames, but I'd like to make the
implementation a general case.
Various of the functions in the parent document need to call themselves
in the child documents with the same parameters as they've just been
passed.
Now, I can stick a loop in each function that goes throught the
window.frames array and calls the function for each frame, but for I'd
like to write a function to do this.
It's at this point that my brain explodes. If I limit it to a single
parameter we can do:
I'm in the middle of a JavaScript class, and I've run into a problem with one assignment. ^^; I've been given a pre-written script and HTML code to work with, and am required to modify it. Here's one thing I have to do, via my instructor:
Add an "email" field to this form. This field should also validate as a valid email address. (Hint: after adding the form field to the form itself, your next step will be to expand the function named submitIt() by adding a second if statement to confirm the contents of the email field. You will want to paste into the header and use the validEmail() function which you will find in Script 7.15, highlighted in red on pages 192-3 of your textbook.)
I know how to write the code to validate an email address, but I can't figure out how to call the validEmail() function in the submitIt() function. The code I have now just blanks out all the fields when I hit "submit." Here's the part of the script with the email validation:
window.onload = loadDoc;
function loadDoc() {
resetForm(document.forms[0]);
[code].....
<html>
<head>
<title>TESTING</title>
<script type="text/javascript">
[code]....
This is a very basic version of what I am trying to do. I have a dynamic list which is set in a table. When clicked, a function is run to set up a new list.. The reason I explain that, is that I need to keep it dynamic.Now for the problem:When I run this page, I have the button made right away, then when clicked it creates the new button. The new button should also run the function to create the new button again, but when I click it, I only receive "error on page".
I'm trying to "progressively enhance" one of my surveys using javascript. Basically, I have rating scales that make use of radio buttons as each point on the scale. Each radio button occupies its own cell in a table. I wrote some functions that will highlight cells on mouseover in a color corresponding to its position on the scale (e.g. the lowest point is red, the midpoint is yellow, the highest point is green). When a radio button is clicked, the background of the button's cell and preceding cells in the same row will be colored accordingly. The functions are working well in FireFox and Chrome (I just have to add a few lines using the addEvent function to make it compatible with IE).
The effect looks a lot nicer when I add a function that makes the visibility of the radio buttons hidden.
However, I want to make sure that there is a fallback option in case the functions that color the cells don't work for whatever reason. I would not want the radio buttons hidden in this case.
Is there a method whereby I can call the "hideRadiobuttons" function only if the other functions are successfully executed?
I am creating a little word guess game, with a random function which picks the word from an array of 10 words. The second function checks if the users' letter choice is part of the secret word. Currently, each time the checkGuess() function is called, the word is changed, probably because I am calling the wordPicker() function from within. The wordPicker randomly chooses the word, then returns that word. All I want to do is pull that word into the checkGuess function, without calling the wordPicker function as it currently does. Here is the code:
Create secret word array
var wordList = new Array("stealth", "telephone", "internet", "nickel", "marine", "instantiate", "method", "function", "television", "monitor")
[Code]....
I'm working through the sitepoint ajax book and had a problem with a particular chunk of code. I eventually tracked down the error and it was being caused because I had:
window.onload = Monitor.init();
instead of:
window.onload = Monitor.init;
Now, one of the sticky threads mentioned that the first is a function call and the second is a function pointer. My questions are:What's the difference between a function call and a function pointer? Why did it cause problems in this particular case? What are the general implications/issues with using one over the other?
A group of select inputs with identical options When an option is selected from 1 dropdown it is removed from the others (unless its a blank one)
Now I'm reusing the script in another application that has multiple sets of dropdowns (but only 1 that the script needs to apply to) It works fine except, all the options get jumbled up - in all the dropdowns.
The script is a little beyond my level of javascript - I think largely because it doesn't use 'sensible' variable names so its quite hard to follow. How can I modify the script to not mess up the order (most importantly of the other dropdowns that aren't having elements removed and added) Code:
Is this correct? The following three lines are equivalent, for
example, [1] can be replaced with [2] or [3] anywhere in a script
without changing the return value and without changing any side effect.
[1] var r = o.f(a,b);
[2] var r = o.f.call(o,a,b);
[3] var r = o.f.apply(o,[a,b]);
( o is an object and o.f is a function. )
The following three lines are equivalent:
[1'] var r = g(a,b);
[2'] var r = g.call(this,a,b);
[3'] var r = g.apply(this,[a,b]);
( g is a function, for example,
var g = function(a,b){return [this,a,b];}. )
How do you call a function within an implementation that's in this form:
(function () {
var G_vmlCanvasManager_ = {
init: function() {
...
},
initElement: function (el) {
...
}
...
})();
I'm trying to call the initElement function that's within excanvas.js
which its comment says is public.
If I try calling initElement(c) or G_vmlCanvasManager_.initElement(c) IE
gives errors.
I'm not sure if this is a style sheet issue or a Javascript issue.
I'm trying to work out a new design for my software's control panel.
The idea is that there are images on the left that you click and that
as you do, DIVs with option links appear and disappear on the right.
Because I want each of the DIVS to appear in the same place, I use
Javascript to set their padding and their height to 0px when they are
invisible. This is working the way I wish in Netscape 7.1 but it is
not working the way I want in IE. Can anyone give me a hint about why?
Basically, if a value is a member of all the arrays passed to the function, this function will add that value to a response array. The function returns the response array.
/**
* Return an array of members existing in all argument arrays.
*
* @param aSet(n) JSArray.
*/
function getSetIntersection(aSet1, aSet2) {
var temp = [];
var offset = arguments.length - 1;
var response = [];
for (var i = 0; i < arguments.length; i++) {
temp = temp.concat(arguments[i]);
}
temp.sort();
/*
* The goal is to find an ordered sequence of n identical members of temp,
* where n = arguments.length. For this, we just need to check the start
* and end points of the sequence, and if they match, push them on to the
* response array.
*/
for (var i = 0; i < temp.length - offset; i++) {
if (temp[i] == temp[i + offset]) {
response.push(temp[i]);
i += offset;
}
}
return response;
}
The assumption is that no member of the original arrays is repeated. I'd welcome a sanity check for that.