Is there a way to make one property an alias for another? This would
mean that if the value of the original is changed then so is the value
of the alias. I tried the following example and it does not give this
type of behavior, of course. Code:
While reading on $() function, i read that it is alias of jQuery function. Can you prove or show me how $ is an alias of jQuery function . Actually in the library file there is jQuery function defined in the top level [URL]
View 4 Replies View RelatedI am writing a Javascript UI component. I have already written a
"disable()" method for it, but I would like to go one step further in
order to make my component as compatible with existing HTML controls as
possible.
With standard HTML controls we can do this:
myTextField.disabled = true;
and as soon as this property is set, I assume there is a property
listener of some kind that is invoked to change the appearance and
value etc of the control.
I want to write my own 'property listener' to do this with my control.
Can I do it in Javascript or is this too "low level", requiring code at
the browser implementation level?
I have several tags on a webpage of the same class. If the user clicks a
specific checkbox I'd like to be able to alter the display property of the
class, affecting all objects of that class.
This is an intranet application so we know that javascript will be enabled
and the browser will be IE.
How can I affect all the members of this class? Is there a way I can toggle
the DISPLAY property of a class so all the elements using that class would
be affected? Code:
I have situation that when my page is loaded i create js object
<html>
...
<script>
function Page() {
this.page = 0;
this.result = 0
this.resultCount =1;
this.currentPage =1;
}
MyPage= Page()
</script>
then in my javascript function i use object like this:
function getPage() {
if(!MyPage) {
MyPage = new Page();
}
return MyPage;
}
but there is one problem: MyPage lost one of the property, currentPage.
When i do alert(MyPage.cuurentPage) shows mi undefined. After object
initialization everything seems to be alright, currentPage is set to 1
but when i Try use MyPage in my js code is already set to undefined.
What happen? What I'm doing wrong?
I have following css code in a html file:
<style>
.myClass { color:red; }
</style>
How can I extract the value of the property "color" from the class "myClass"?
Pseudo-code (which of course doesn't work), so you get the idea:
<input type="button" onclick"alert('The CSS color is '+document.style.myClass.color)">
I have a word bank for a javascript crossword puzzle I'm working on. What I
want to do is when a user clicks on a word in the word bank, it crosses
itself out. I have tried:
<a href="javascript:this.style.textDecorationLineThrough">text here</a>
to no avail. does anyone have an idea on how to do this?
For a application I am writting I need to make some table columns apear and disapear by clicking on a link. I do this by changing the "style" property in the <td> tag.
The HTML is generated by ASP.NET, which automaticly sets the style property of the <td> tag to the right value. and makes links to the right Javascript function call to change a specific property.
This is the HTML output of 2 table columns: Code:
I'm sending arrays of results from my server in response to an xmlhttprequest like so:
array({key:value[,...]}[,...]);
I know I could use an associative or indexed array, but this is just how I wrote it as I'm using the prototype library and I'm in the habit. Anyway, I want to know if I can reference 'key'. If so, umm, how?
I'm using javascript to dynamically make controls show up or disappear on a form. For some reason, if I load a control (in this case a select control) into the Div it shows up perfectly. If I load text in there, it is fine too. However, if I programmatically try to go from the select control content and cover it with text afterwards, that won't work.
If I change the content from one string to another, it works as well. I just cannot remove a control I've put down and replace it with text or "" or whatever.
I just wrote this script which loops through all of the CSS properties for an element, and dynamically generates an HTML document using a for/in loop in a new window which is a table of all CSS properties and values for the element. Some may find it useful.
You can see the demo here:
({}["toString"]) - function
alert("toString" in {}) - true
But I want to only find a property that is defined in the object - not in a prototype.
for(var prop in {}) { alert(prop); }; // toString not found.
It seems that operator 'in' is overloaded. 'in' during iteration: look in the property. 'in' in a boolean conditional: look in the object, then up the prototype chain.
I want a way to get only properties defined within the object itself, not it's prototype. Is there no simple way?
Is there some way to add a property to a object ?
Code JavaScript:
if (Object.__count__ == undefined)
{
Object.property.__count__ = function {
// [url]https://developer.mozilla.org/En/Core_JavaScript_1.5_Reference/Global_Objects/Object#section_8[/url]
count and return
}
}
i am developing an application , we have to run it for Netscape
V4.76(!!) , the problem is it seems that Netscape V4.76 does not
support 'disabled' for form elements for example something like
<INPUT class=f2 type=checkbox value="C" name="chkAttr" DISABLED />
is not working for netscape whereas its working fine for IE.
I would like to override the "disabled" property of a hidden field. When
disabled is set to "true", it would call a function to disable 2 other text
fields on the form. When disabled is set to "false", it would enable those
2 text fields. You should also be able to get the value of it as if it were
a property:
alert(my_hidden_field.disabled);
Is there any way to do this?
Is there a way to determine the object that a property is in? For
example:
function MyClass() { ... }
MyClass.prototype.myFunc = function() { ... }
var obj = new MyClass();
var sameobj = SOMEFUNCTION(obj.myFunc);
So my goal is to get a reference to the object by just having the
property.
I have a script that I want to run only when my input box IS NOT
disabled. Can someone tell me if something is wrong with my script? Is
"disabled" the correct property to use?
function TextChanged(i){
if (!document.ScheduleForm["txtGrossPayroll" + i].disabled) {
document.ScheduleForm.txtRecordStatus.value = "Changes Made; Record Not
Saved.";
document.ScheduleForm.txtRecordStatus.style.color = "#FF0000";
}}
I've code like this:
var x =window.open('http://localhost/canvas.html','myokno')
var w =x.width
Permission denied to get property Window.width
var w =x.innerWidth
Permission denied to get property Window.innerWidth
why i can get properties of new created window???
The second problem is much more important:
i want to get element which id is "canvas" and it is in new window so i do
like this:
var canvas = myokno.document.getElementById('canvas')
ReferenceError: myokno is not defined
var canvas = x.document.getElementById('canvas')
Permission denied to call method HTMLDocument.getElementById
so i start working on the problem and:
var can = x.document
can
[object HTMLDocument]
var can2 = can.getElementById('canvas')
Permission denied to call method HTMLDocument.getElementById
what i doing wrong?
To stop the keyboard event for the F4-key from propagating in IE I need
to set event.keyCode to 0. But setting keyCode to 0 in Mozilla/Firefox
will throw an exception since it is a read-only property.
So, how do I check if event.keyCode is writable?
(I could do some check to see if the script is run in IE or add a
try/catch for Mozilla, but I would like to know the 'correct' method)
Some of the object properties in the Dojo Toolkit are set to objects but they are using syntax like this:
object.property = new function() {
this.property = someValue;
this.property = someFunction;
}
Is the property set to a new object and if so what is the "new function()" statment doing?
Is there a way to access the value assigned to onmousedown for an
object? I've been searching online but can only seem to find how it is
assigned via html. What I need to do is access the value (the script
string) in javascript.
For example, I'd like to try to do something like this:
function virtualClick(objectName) {
eval(document.getElementById(objectName).onmousedo wn);
}
I am of course not explaining the full problem in detail, but would
appreciate any input on how to access the onmousedown value (or to know
if it even exists as a property).
Can someone please explain why the following code works in IE but not firefox please.
In ie I get an alert box with "mynewprop" but in Firefox I get "undefined"....
I have developed a script that change the font size in css, but only
the attribute "font-size" on the body tag, not change the entire
active stylesheet.
When i click to change the size
<a href="#" title="Change Font Size"
onclick="cambia_font_size(2);">A</a>
It works fine, but when i try to check the cookie to set the default
font size, it does not work.
The cookie stores the value correctly and i can read the value. The
problem is when i try to change the value:
document.getElementsByTagName("body")[0].style.fontSize=tam;
I have tried also writing this code at the end of the html document
but it doesnt work
<script type="text/javascript">inicializa_fontsize();</script>
What could happen? Code:
With something like this : <form name="a"><input name="name"></form>
Is it possible to get the name of the form (a) and access the input object
(name) too?
I'm trying to figure out how to use a variable as a css property. For example: $('.name').animate({variable : 100}); I wrote up a quick example script. My goal is to switch the animation direction depending on the link that you click. Either have the object animate from the left or top. Any ideas how this could be done? Or why this isn't working as
[Code]...
I'm using ccs3PIE with my site. What I want to do is check if a DOM element has a css property like border-radius and then add a class to it.
The problem I'm having is that I don't know how to check for the css property. I've been searching for it for a couple of hours now and I can't find anything that seems to work.