So, we have the JavaScript native objects: Object, Function, Array, String, Number, Boolean, Date, Math, RegExp, Error Then we have the DOM interfaces... the most important object that applies those interfaces is the document object...
But also, there are the Browser Objects: window, location, screen, history, navigator.The JavaScript objects are defined in the ECMAScript standard, the DOM interfaces are part of the DOM standards, but where are the Browser Objects standardized? Nowhere?
Is there a way in Javascript or Jquery to return an array of all objects underneath a certain point, ie. the mouse position. Basically, I have a series of images which link to various web pages but I have a large semi transparent image positioned over the top of the other images. I want to find the href of the background image that the mouse pointer clicks over.
The following code is working fine in firefox n not working in IE8... I get the Object Expected Error when the code hits the if(GBrowserIsCompatible())..... line in the javascript code. Clear cache and browser history does not work. Does anyone have a resolution for this?
Is there a way in Javascript, or perhaps in HTML, to force a browser to re-render an image on an HTML page after a round-trip between the client and the server ?
In my particular case, the image is changing on the server although the URL for it remains the same, but the browser is still displaying the old image from its cache rather than the new image from its URL location.
I want to use jquery to detect what type of browser you are using and display a link to a .wmv file if you are on IE or display a link to a .mp4 file if you are any other type of browser.I have this script declaration in my <head> section.
On my site i use a lot of features that are unsupported by older browsers, and right now it looks pretty stupid when the features are only partially shown. So i was wondering if there's a way of making the browser look to different css files depending on which browser and version it is. For example, css3 gradient backgrounds are supported in firefox 3.6 or something, but not in 3.0. All the hacks out there is to 3.*, so it changes for the allready working 3.6 too if i hack it. I want to controll it so that i have a specific css file for the none-supporting version and lower and one for the supporting and above. I looked at a bad browser plugin (because it has some of the basic features im looking for)
is it possible to scroll / jump to say, 10px above a div? i tried adding padding, but it doesn't work.also, when I use <a href="#xxxx">, is it possible to prevent the browser from adding #xxxx to the url in the browser?
I need a script that will redirect to a specific page is the browser is safari version 4. if the browser is NOT safari 4 I want the browser to stay on the current page.
I have to open a new window when user closes the browser window. But the problem is that on browser close unload event calls and the same event is called with we refresh the page. So it is opening the popup window on both window close and window refresh.
$.browser is being deprecated however I still need to know what browser is hitting the page. In some cases I need to modify a layout or position an element by some pixels. The number of pixels is different for different browsers.How can I detect the browser using jQuery without using $.browser?
I am trying to figure out how to use objects properties in my code so when the page loads All my properties are in object where I can use elsewhere in my page. Code:
I'm trying to use the following code to load xml files:
ImportXML = function (ts) { this.file = ts; if (document.implementation && document.implementation.createDocument) { this.doc = document.implementation.createDocument("", "", null); this.doc.obj = this; this.doc.onload = this.callBack; this.doc.load(this.file); } else if (window.ActiveXObject) { this.doc = new ActiveXObject("Microsoft.XMLDOM"); this.doc.onreadystatechange = this.ready; this.doc.obj = this; this.doc.load(this.file); } else { alert("Error"); } } ImportXML.prototype.ready = function () { if (myDoc[counter].readyState == 4) this.obj.callBack(); } ImportXML.prototype.callBack = function () { alert('loaded'); }
var xmlDoc = new ImportXML("bar.xml");
The problem I'm having is with the second line that reads this.doc.obj = this;
IE tells me that object doesn't support this property or method. How is it possible to get a reference to the object (xmlDoc) in the prototypes 'ready' and 'callBack" with IE?
If you have a javascript interpreter running in an environment unknown to you (as in what objects it exposes to the language) is it possible to loop through all objects in some way?
This is a non-browser environment, specifically the scripting engine for doing xslt extensions in msxml.
"When we combine FUNCTIONS with OBJECTS we get METHODS". Then he creates an empty ARRAY:
var a = [];
then he uses the "push() method" to add elements to the array.
a.push(1,2,3);
uh, methods are for *objects* right? Yet he is using them on an ARRAY.how an array can magically becomes an object that is manipulated by a "method"?I mean, the array is still an array, no? It never actually becomes an object, right? Yet we still use a *method* to manipulate it. See my conceptual quandry?
I've often write javascripts that use this rather common code to get all tags in an XHTML document:
var alltags = document.getElementsByTagName('*') ... and then use a for loop to access the elements as an array, for example: for (i=0;i<alltags.length;i++) { elementClass=alltags.className [i]Do stuff }
This has always seemed to work in the past, but I recently learned that the getElementsByTagName method returns a DOM NodeList, not an array. I'm currenly working on a project that needs to access the children of an element conditionally upon its class.
I have three questions. First: How do I declare a global variable to be a DOM NodeList object? It wouldn't be assigned until called from a function, so something akin to var elementList = document.getElementsByTagName() in my global declarations is out of the question. Is there something like var elementList = new NodeList() in javascript? (I know that I can assign it in a function without the var and it will be global, but other people may have to work with this code, and I'd like to have it clearly declared at the head of the program.)
Second question: Assuming alltags is a NodeList returned from a getElementsByTagName call, which of these is proper? This:
childElements = alltags[i].getChildNodes() ... or this: childElements = alltags.item(i).getChildNodes() And finally, which of the above techniques has better browser support?
I recently had a problem where I needed to build up an array of strings, that would be join()ed into a string when the array building was complete. however, each value could only be in the array once.
This was a problem for a few reasons. Once a value has gone into an array the only way to check for it that works cross-platform is to scan the array looking for the value. FireFox has the every() and some() functions but they don't work in anything else.
Using an object to simulate an assocaiative array would allow me to avoid this problem by storing key/values with the keys having the same value as the value I was storing. I could then use the (a in b) construct to check that I had not already added a value.
However, array type methods won't work with objects, so I had no access to size () or join () meaning I'd have to manually build the string by iterating over the object.
My solution was to use an array object, but to store the provided data i nboth the array proper and as a property of the array object.
var myArray = new Array;
function addVal (val) { if (!(val in myArray)) { myArray [val] = 1; myArray.push (val); } }
This approach does use up more memory but it does give me the advantages of both arrays and objects for little extra work. (if you don't have FireBug then replace console.log with alert)
That arrTD will have an array of "HTML DOM TableData Objects".
Now what is the best way to access each object and see what it contains. I would like see which properties each object has and what their values are. I also guess there could be some other objects within the TD object and maybe even some events and methods.
Now I have been reading an on-line reference about DOM, but I think it is a little dated.
http://www.w3schools.com/htmldom/default.asp
For example I know that a <TD> can contain class="something" but I could not find a property called class, but it did list others like id, align etc.
I would like to learn how to access and view the contents of a DOM object.
I would like to have page which uses a few xhr objects and automatically (after 30 seconds) starts the same few requests again It works for me well in IE7, IE8, but not IE6 (where is in browsing history chosen option "automatically" ). It works there only for first time and I can't set it for circular reloading. It looks like page is reloaded, but xhr objects are not doing their job ...only - as I wrote - for first time after page load.
where node_b is a pointer to a DOM object: node_b = document.getElementById("a") The reason I passed a DOM object into a variable, was to avoid searches document.getElementById() each time. However, it will not work. I am confused I cannot figure out if it a a mistake of mine or just the way javascript works.
Could anyone explain why I cannot use variables as DOM objects in order to avoit each time a tree search document.getElementById("a")? Bellow is given the code with explanation when it works and when it fails.
Does anyone know of any generic code to clone an object (which only contains properties), which copies by value, not just reference?
It seems as though there should be some sort of prefab recursive function that could work for any old object, so I didn't want to re-invent the wheel Code:
I am dabbling with objects and have successfully created an object with various properties, one of which is an Array, and all is fine. the Question I have is can I make an Array of objects? I have the following object:
dataSeries.Type = value dataSeries.Name = value dataSeries.dataPoints[n] = Array of values dataSeries.color = value
What I would like to do is have an Array of multiple objects supposedly like:
dataSeries[0].Type = value dataSeries[1].Name = value dataSeries[2].dataPoints[n] = Array of values dataSeries[3].color = value
