In class based languages you can override methods in subclasses like so:
class BaseClass{
methodA(){
print( name() );
}name(){
return "--base--class--";
}}
class SubClass extends BaseClass{
name(){
return "--sub--class--";
}}
So the following code prints "--sub--class--"
(new SubClass).methodA();
So even though methodA belonged to the BaseClass, it called the overridden version found in SubClass. Would the equivalent code in Javascript print "--sub--class--" or "--base--class--" ?
I have a Jar file that contain several classes. Is it possible to call the classes methods from JavaScript? If so can you point me to a document or an example.
How can i override all the styles being cascaded applied to some HTML element?
For example:
I have a stylesheet where DIV styles are described DIV { padding: 10; margin: 10; }
and have HTML code:
<DIV><DIV style="override:all">Test</DIV></DIV>
I would like to not have the inner DIV padding, margin and other directives described in styles above. Actually I would like to discover some directive line "override:all"!
I am using the "lightbox" effect to open my images which uses javascript. I am also using jQuery for the changing banner at the top of the page. Ever since I put the jQuery script in, the "lightbox" script stopped working. When I remove the jQuery script, the "lightbox" script works again. Obviously they are conflicting for some reason. I have included the relevant code below.
to append a parameter string like: '?key=val' to the currenturl and the value for the key changes based on the user input. Isthere any jquery utility that does the base url extraction fromwindow.location, so that I can append the '?key=val' to that?
I am trying to think of a good way to write some javascript that checks to see if the url entered by a user is base directory url and not an individual page. For example,
I am using a generic Template in a site where different domain names may enter at different levels of a web site.By using some CSS in my <header> to set the base url.I am able to refer to the address of an image by just having.By changing the BASE URL I am able to change which image will display.So I need to obtain the URL address that the viewer, came into the web site on, and then set the BASE URL.
I need to make a drop-down menu for my multi-level website. I need all the links on this dropdown to work on every page, no matter on what level (subfolders, sub-subfolders etc.) it's called out.
i have a base href tag on every page set to my index page the links in my drop down menu look like this location='supplies/painting.htm'
where 'supplies' is the folder contained in the main root folder, so it should be working but it's not. Whenever i click on this link while i'm in the 'about_us' folder, it tries to bring out the page 'about_us/supplies/painting.htm'
Only thing left to add is that this script is included "as is" with dreamweaver, and thats why i have no idea how it works. I'd code it myself, but the client wants it that way Code:
var parent_child = function(po, ps, co, cs){ var url = 'http://xyz.com/abc/'; var pars = [], childs = {}, tmp; this.p_added = function(urlFrag){
[Code]....
What i want to do is to create a new class with the above one as the super class, pass in one more variable to the constructor and override the p_added function. I thought of doing something like xpc = new parent_child(); and override the function with xpc.prototype.p_added = function(){}
how to pass in another variable to the constructor and make it private to the new class.
I believe there is a nice and concise way to achieve what i want to, but i can't find it. And the fact that OOP in javascript can be implemented in several different ways doesn't help my cause.
I'm trying to use javascript to control a table's td styles. What I want to achieve is to
- apply style A onmouseover - apply style B onmouseout - apply style A onfocus
The problem is that the mouseout event overrides the focus event. Also I'd like each element to stay on the focus state until another element gets clicked.
This is my code:
<script language="javascript" type="text/javascript"> function HoverStyle(element) { document.getElementById(element).style.backgroundImage = "url(images/arrow1.jpg)";
I have been developing a website in html and javascript for people to play the game Runescape (www.runescape.com) on.
It uses a textbox and array to open the page of the selected server into a frame, but they have recently added this little bit of javascript to the pages on which the game is embeded.
Does anyone know how to suppress the default messages?
1. "Are you sure you want to navigate away from this page?" 2. "Press OK to continue, or Cancel to stay on current page"
I need to provide the user a custome message. I tried many approachs, but non of them seem to work. I tried to use a confirm box instead, but for some reason, the return value for onBeforeUnload event seem to be used as string, so return false to the event CANNOT stop the page from refreshing.
I want to turn all text on a page black when the user clicks a print icon. (Along with that I also remove some DIV's so only the information someone would want to print is visible)
If I add * {color:#000000} to my CSS it does exactly what I want. Now I need to figure out how to apply this rule dynamicly to my document object or perhaps the body when a function is run.
JQuery and have a problem with an expandable menu I have created for a new Wordpress theme.
With my expandable menu I am simply (slide)toggling the children <ul> by clicking the parent <li>. This should work fine but jQuery is overiding the default event for the anchors in the children resulting in me having a nice expandable menu that animates well but with its links disabled.
As far as I can tell this should work as I am targeting one level of anchor beneath the parent and not any other more deeply nested children.
The problem only applies to the followning browsers - Firefox 3.5, Safari 4, Chrome and ie 8.
It works fine in ie 6 and 7, Firefox 3 and Opera 9.
The jQuery is as follows:
The html structure is as follows:
I left the anchor details (href, title and so on) out just to make the html code a little easier to scan.
I have an editable div, when clicked displays two buttons - save and cancel. When either button is pressed the respective function takes place. The problem I'm having is with the onblur function. When a targetElement loses focus, I want to figure out which new element gained the focus - if it is the save button then I want the save function to fire. However, if it is any other element then I want the cancel function to fire.
I'm trying to figure out once an editable div is selected and the user clicks the save button, how do I determine that the save button was clicked and trigger the save function - because with the onblur method attached to the editable div any click outside the div is interpreted as a call to the onblur method, even if the save button is clicked.
I have a site with the main content displayed in an iFrame. The problem is the outside frame is not exactly rectangular so the iFrame corners go over the corners of frame. I solved this by having the pages in the iFrame transparent and this works fine. However, I wish to only have the iFrame displayed when it is fully loaded. I have pretty much worked this out but there is just one problem. I cannot work out how to set the iFrame to not display initially so I can then change it from Javascript. In other words, I have the following function that shows or hides the iFrame. I simply parse "none" or "block":
Code: function showHideFrame(display) { Frame = document.getElementById("frameContent"); Frame.style.display=(display); }
I then have this function that is called from Flash to change the page. Before the page is changed I hide the iFrame: Code: function changeFrame(page) { Frame = document.getElementById("frameContent"); showHideFrame("none") Frame.src = page; }
I then have the iFrame set up as follows: HTML Code: <iframe src = "[URl]" id="frameContent" allowtransparency="true" frameborder="0" onload="showHideFrame('block')></iframe>
The problem with this is that it starts visible. I have tried adding a HTML Code: style="display:none;" To the iFrame but then the javascript cannot set it to block it stays hidden the whole time. I have also tried putting it on the CSS but the effect was the same. So how can I override the CSS? Or set it to be invisible initially?
I have an image that is encoded as a base 64 string, and I'm having trouble passing that a WCF service using $.ajax(). I initally tried using JSON to pass the argument to the web service, but I kept getting 400 Bad Request errors for anything of reasonable length (if I just pass a test string in, it makes it through, of course). I've tried calling encodeURIComponent on the string before stringifying it, but that hasn't helped. I've also tried various content types ("application/json; charset=utf-8", as well as whatever the default is) and that hasn't made a difference either. Unfortunately, the request is being made through a mobile phone, so debugging options are few. Is there an upper limit to the size of the argument that I'm passing in this? The strings can be a few hundred kb at the low end up to maybe 1 or 2 mb at the high end.
Got an assignment for a javascript class and I have been banging my head against the wall for a week now.[code]In the main page I have tried several different ways to access the "src" property of the image, none of which I am 100% sure is correct. I think the problem is in the main page, in that I am not accessing the image right, but I could be wrong. I have spent hours on google and digging through the book, but I am still coming up empty handed.
I'm redesigning a large website right now, and the problem i'm having is that there is already a CSS class called "required" that has been used extensively all over the site. However, I want to use the jQuery.validate.js for the forms. is there any way to override this?
Check out the official blog post on the 1.4.3 release:[URL]..I am thoroughly confused by this sentence (under "Events"): "jQuery has already had setData and getData events (which are broadcast whenever data is set or gotten through the .data() method) overriding these methods makes it possible to override the default behavior for those features (namely you can return a different value or prevent a value from being set."
1. had setData and getData events overriding these methods" -- which methods? 2. "makes it possible to override the default behavior" I have looked into the source and I cannot think of any way to either "return a different value" or "prevent a value from being set."
Can anyone assist me with what I am trying to do with the following code (six different scenarios to try to make the functionality work correctly)?
I want to always (and ONLY) display in the status bar 'Symantec Corporation' whenever anyone mouses over (onMouseOver) my image or link OR when one clicks while holding the left mouse down (onClick) on the same image or link. Upon releasing the mouse (onMouseOut), the status bar should be 'blank'. I need the link to open in a new window via my function openWindow(URL) code.
What is happening in most of the six scenarios, is that when one clicks the link, either the function doesn't engage, but rather the <a href= takes effect instead OR that status bar shows 'javascript:openWindow('http://www.symantec.com/');' when one clicks while holding the left mouse down (onClick) on the image or link.
Additionally, for only the link, I need the CSS/style to show 'red' when one mouses over (onMouseOver) it and then change to 'blue' upon releasing the mouse (onMouseOut).
How about integrating 'style="cursor:hand"' into the code or perhaps setting some of the data via a <div> or <span> snippet? Code:
I came across a very odd browser behavior when trying to modify a css class using javascript and at the same time having a base html statement in my html file.Without the base html statement, all browsers work fine and I can change the css class definition using javascript easily.With a base html statement, only FireFox still works while Internet Explorer and Google Chrome dont work anymore. If there is a cross-domain issue, while one browser does work and the others dont? An example of what I'm talking about, with the base statement:
http://freebsdcluster.org/~casaschi/tmp/example-base.html Without the base statement: http://freebsdcluster.org/~casaschi/tmp/example-nobase.html
how to tweak the code in the case with the base html statement in order for the javascript to work with all browser (modifying the class definition) ?I want to be able to manipulare css classes with javascript when a base html statement is in my html code.This is essentially the code:
