Using Two Or More Images On A Page With Prototype Object?
Sep 8, 2010I am using this script.
[URL]
**It is not possible to apply Tipmage to more than one image in a single page**
Is this possible to apply this class to more than one image?
ADVERTISEMENT
Difference Between Object.prototype And Function.prototype?
Nov 25, 2011According to ECMAScript, the root of the prototype chain is Object.Prototype. Each object has an internal property [[Prototype]] that could be another object or NULL.... However, it also says that every function has the Function prototype object: Function.Prototype, it confused me, because a function is an object, for a function object, what is its function prototype and object prototype..For example:
var x = function (n) {return n+1;};
what is the relationships of x, Object.Prototype and Function.Prototype
How Come Object.prototype Inherits From Function.prototype
Dec 14, 2009I am trying to get to the bottom of javascript object, prototypes etc. I have a fairly good grasp of it, but I get confused the closer I get to the base object.prototype. FIrst of all, I was under the impression that all objects descend directly from Object. But some objects (like Array) seem to inherit properties and methods from the function.prototype. So does this mean that the chain is like this:
object -- function -- array Second, I noticed (on the mozilla javascript reference site that object.prototype inherits properties and methods from function.prototype and vice versa!? How can this be? I must be missing something important about understanding the chain?
Copying All Prototype Functions AND The Constructor From One Object Into Another Object
Apr 5, 2011How would I go about copying all the prototype functions AND the constructor from one object into another object, and then call them?
I know I can use this.example.call(this), but that's not an acceptable solution. I want to deploy this style over dozens, potentially hundreds of objects.
Object.prototype
Mar 15, 2006Lets say we run: window.alert = function() { };
Is there anyway to 'restore' the original alert() method or is it gone
forever?
I know you can do window.alert = Window.prototype.alert, but lets say
you also set Window.prototype.alert = function() { } or lets say we're
in Opera, which doesnt have a Window "class".
Object As A Prototype.
Jan 11, 2007I wanted to add an object as a prototype to separate my methods more
nicely, however, I ran into a couple of problems. Apart from the
obvious "scope" issues I found that any instances of my class shared
the objects methods and properties.
I realise (now) that this is actually how prototypes work, they share
functions and objects rather than create new instances of them for
every "class", but is there any way around it? (or shouldn't I be doing
things like this at all?) Code:
Having More Than One Object Without Using Prototype
Jan 23, 2007I am working on my own pop up calendar, mainly because the one I am currently using crashes the Safari browser at times.
So, I want to verify that what I am doing will work, in that I want to be able to have multiple calendars open at the same time, each independent of the other.
So, I start it off with:
var Calendar = {
dateSelected: null,
topPos:null,
leftPos:null,
somefunction:function(e) {
...
}
};
If I create more than one calendar object, will they have their own variables, in that the dateSelected, topPos and leftPos will be unique to that instance?
Or, is there a better way to do this, that is cross-platform.....
Prototype.js Object Persistance
May 25, 2006I've created a new class using prototype.js. After I make the ajax.request all references to this.myClassMethodorVariable are lost. Does the ajax method blow out the object persistance? I'm fairly new to OOP javascript so could be (and probably am) overlooking some detail. Code:
View 45 Replies View RelatedJQuery :: When Is Use Of The Prototype Object Appropriate, And When Is It Not?
May 7, 2009QUESTION ONE: When is use of the jQuery prototype object appropriate, and when is it not?
BACKGROUND:I am still trying very hard to identify the error that is prohibiting me from incorporating a jQuery plug-in into my site in a manner similar to the way that the author of the plug-in has incorporated it into his.Although I have sought consultation with the author, he appears uninterested in working with me.My still fledgling knowledge of jQuery tells me that the author of the plug-in and my implementation of his plug-in are constructed differently.Whereas I use jQuery's prototype property to reference my method and then assign my method anonymously to my HTML document as follows: $().myJQMethod().The author of the plug-in does something very different.I have extracted from the author's plug-in and my implementation of it. Links to the source pages have been included.
CONSTRUCT A (The jQ_Impromptu Plug-In):
(function($) {
$.prompt = function(message, options) {
})(jQuery);[code]...
QUESTION TWO: Although I am able to implement the author's method, it is not performing as it should. When the alert box appears with focus the hosting HTML page is suppose to show through with dimmed opacity.My implementation does not achieve this effect. Firebug has alerted to me to the following breakpoint, but I am poorly unable to interpret it.
Object.prototype, Getters And Setters
Jul 23, 2005I find the JavaScript's Object.prototype and getter/setter mechanism
very nice. However, I need some help with extending an object with
getters/setters in the derived class. For example:
A : function () {}
A.prototype =
{
a : null,
get a : function () { return a++; }
};
B : function () {}
B.prototype = new A;
Now, I would like to define a getter/setter in B. How do I do that?
There is no way to use the same syntax as in "A.prototype = ..." above.
Setting An Object's Prototype Directly?
Oct 14, 2005I was hoping I could do something like this in javascript:
var a = {x:1, y:2};
var b = {x:2, z:3};
b.prototype = a;
And then:
b.x => 2
b.y => 2
b.z => 3
The purpose is to set up "b" as an override of "a".
I know it doesn't work that way because "prototype" is not a magic property on any object but constructors only. Is there a way to implement the above without involving a constructor?
Object's Prototype Variable Inheritance
Aug 29, 2006I'm looking to do something like this:
function superDuperObject(range) {
this.startContainer = new superDuperObjectStartContainer(range);
}
function superDuperObjectStartContainer(range) {
this.calculatedContainerNumber = doSomethingAndGetSomethingBack(range);
return range.startContainer
}
function doSomethingAndGetSomethingBack(range) {
return
someCoolInformationThatICalculateInThisFunctionTha tNeedsTheRange;
}
var myObject = new
SuperDuperObject(DOMRangeObjectThatIDefindedEarlie rInCode);
// Show me the startContainer of
"DOMRangeObjectThatIDefindedEarlierInCode"
alert(myObject.startContainer);
// Show me the calculatedContainerNumber that I get from a function
that does stuff with the range passed to it
alert(myObject.startContainer.calculatedContainerN umber);
How Would The Relationship Between An Object And Its Prototype Be Depicted...
Jan 18, 2007in UML? I just found that UML is actually very class-based. It's
difficult to depict the relationship between a constructor function,
its prototype property, and objects that are created using that
constructor function using UML.
Have any of you ever attempted this? How would you do it?
Is It Not Well To Extend Object.prototype Derictly?
Aug 12, 2007As I know,it's not well to extend Object.prototype derictly.
In the Prototype(JS Framewoke),there is no extend Object.prototype.
It only add some static method for Object class.I want to konw the reason.
Parse Collection Object Using Prototype?
Jul 6, 2009I have the following nested javascript collection (below) and I'm trying to access the information within the collection using prototype so I can properly style and layout the data.
var teams = {
"team1:" {
"QB": "Alexander Hamilton",
"RB": "John Jay",
[Code]....
Missing Prototype Property In First New Object
Sep 28, 2009I've ammended my code now so that I'm using objects, constructors and prototypes.
If I use the standard constructor.prototype.functionname = (){......} type of setup it works okay.
However I'm now experimenting with overwriting the prototype with a literal. As in the code below. i.e. constructor.prototype = {functionname : function() .......
Doing it this way my first new object instance fails. The subsequent new objects are fine.
I ran a check on the properties of the 1st object with '!hasOwnProperty and name in' and the result is that the prototype (or pointer to a prototype) is missing.
So the first new object of FontTrans (oH) has
Code:
1 property is Heading
.
.
9 property is Delay
[Code].....
Prototype - Override Constructor For A Object?
Mar 23, 2011I have a requirement to override the constructor of a javascript class. I have to execute the current constructor code and then call a javascript method. Basically, I need to execute a javascript method whenever an object of that particular class is created in addition to whatever is being done now. I do not want to copy and paste the current constructor code and override the initcomponent method. I am looking for an alternative for that.
View 5 Replies View RelatedJQuery :: How To Create Prototype And Custom Object
Apr 17, 2010I am newer in Jquery. How to create the prototype object and custom object in Jquery.
View 2 Replies View RelatedPrototype :: Create A Reusable Object/class
Jul 4, 2011What I have been doing so far to make a "class"/Reusable object is this:
PHP Code:
function Dog(){
this.name name;
this.bark = function(){
[code]...
However, recently I have been reading a book on Javascript and it said that the problem with this way of doing it, is that the bark() function will be loaded into memory for each Dog object created this way, while the body of that function is the same for each object.
- A Person class with a name property and a jump() method.
- An animal class with a isMammal property and move() method.
- A Dog class with a numberOfLegs property and a bark() method which is a subclass of Animal (thus inherits the isMammal property and move() method.
- Each of those classes in its own file.
This book I've been reading is actually pretty good, but at some points it's explanation is not rich enough.It explains that functions are objects and that objects in javascript are just key-value pairs. It says that each function has a prototype property which points to a blank Object(), but you can make it point to something else? or maybe I misunderstood it. I still don't understand how it really works.
Constructor Property Of Object - Inherited From Its Prototype - Changed Dynamically ?
Nov 19, 2009I had read from books that the constructor property of object is inherited from its prototype. And the prototype can be changed dynamically. New property can be added to or deleted from object even it was created before the prototype change.
But I got confused on below codes.
But the actual result (both IE and firefox) is
Prototype & Multiple Forms On A Page?
Mar 26, 2007The page I'm working on has a week's worth of data blocks like this - pseudo code & markup:
<form 1>
field a 1
field b 1
submit 1
response 1
</form 1>
<form 2>
field a 2
field b 2
submit 2
response 2
</form 2>
and so on for either 7 or 14 days.
I'm trying to conceptualize an prototype based js function that can handle all the forms to submit the data to the backend.
What I have now, that works is like the following
Event.observe(window, 'load', ajax_init, false);
function ajax_init () {
Event.observe('form_1', 'submit', send_form_1);
Event.observe('form_2', 'submit', send_form_2);
}
function send_form_1 (e) {
$('response_1').innerHTML = 'doing the deed for 1!'
var myAjax = new Ajax.Updater('response_1', 'ajax_server.php', {method: 'post', parameters: Form.serialize(this)});
Event.stop(e);
}
function send_form_2 (e) {
$('response_2').innerHTML = 'doing the deed for 2!'
var myAjax = new Ajax.Updater('response_2', 'ajax_server.php', {method: 'post', parameters: Form.serialize(this)});
Event.stop(e);
}
But, in my mind, there has to be a way to streamline this so that one function 'send_form' can do the magic rather than having multiple iterations of it. I was looking at the bind functions in prototype, but perhaps it was the late night and lack of coffee, but I wasn't seeing the application of bindAsEventListener in this context.
RFI - Include HTML Fragment On A Page - Prototype.js ?
Jan 29, 2009I'm trying to embed an HTML fragment from one web page into another web page, using AJAX (as the fragment will change frequently). I'm using prototype.js for AJAX.
I've managed to fetch the HTML content of the slave page, but I can't figure out how to get just the part I want from the XML string returned in the AJAX request. The prototype.js AJAX function just returns a text sttring that I need to parse...but how?
Child Page: hello.html
Code HTML4Strict:
I want to include the <h1>Hello</h1> in the parent page.
Parent page: demo.html
Code JavaScript:
Obviously it's the fragment = resultDoc.getElementByClassName( source_fragment_name ); part that I'm having difficulty... It may not even be the right function - HELP.
The resultDoc=parser.parseFromString(transport.responseText,"text/xml"); seems to work, because the subsequent alert() works fine, but how do I get the page fragment identified by the source_fragment_name.
The alert("Fragment = " + fragment ); never happens, so the previous line has serious problem.
So, just to clarify, I simply want to parse the content out of one page, and embed it into another, in real-time, using AJAX.
Refresh Multiple Images - Every Time Page Gets Refreshed The Images Need To Change
Oct 5, 2009I need to refresh multiple images on my site. So every time the page gets refreshed the images need to change. It worked fine with the script below, but this is only related to 1 image
I tried to copy the script and change the "ID's" but this does not do the job.
What should I change/add to the script below?
In head:
In body:
Images Object
May 16, 2007i'm trying to access a certain image object without using IDs... document.images array allows me to do it...
but is there a way for an image to identify its own number....given that there are 3 images, can the second image know that it is image 2?
<img onclick=alert(this.image.number)>
something like that...
[object Object] Error On Photo Gallery Page Load?
Sep 23, 2011I am using a Photo Gallery script called Galleria which uses jQuery/JavaScript to display photos. On my index page load (only in Internet Explorer), a message box pops up saying "Message from Web Page [object Object]". After clicking OK the photo gallery loads and there is no problem.No idea how to fix this, or really what the error means. You can view the error from my site here
View 3 Replies View RelatedReplace Images On A Page With Other Images?
Mar 28, 2011All I've been able to find everywhere for this is examples of changing images when rolling over them or clicking them, and I don't need that.
What I need is a bit of javascript that will recognise some image paths on a page and replace those image paths with other ones.
It's for an ecommerce website on a certain platform, using a customer reviews section which outputs star images based on the customer's rating. So, the images used (which look awful) are, for example, "sourcehere/stars_5.gif", "sourcehere//stars_4.gif", and so on. Just 5 of them.
I want to design my own 5 images, upload those images, and then have the javascript replace the rubbish looking ones on the page with my own images.
I thought I'd be able to find something quite easily, but so far all I can find is examples of mouseover events and so on, and I don't need any of that, just the entire image replaced with my own image.
