Change CSS Properties Of Each New Instance Of Class?
Dec 14, 2009
I need to change the background-image (or possibly background-position) property of each new instance of a div with a particular class. I will have a set of images to choose from, or could create a sprite with all of the images.
I'm trying to make a webpage where you can change the colour of various elements within the page, which has numerous div classes in the css and numerous divs all with different names. What I'm trying to work out and can't find anywhere is can you change the properties of a css class using javascript, and if so, how?
I have a javascript object which dynamically generates a table adding, deleting and moving rows as the user clicks on buttons or links. Problem is when I generate a table row and add the javascript method call to my class, I have to put the object instance name variable of the class in order for it to be called from the onclick=function(). This is seriously limiting, but I'm stuck for a way round it. Heres a edited of the code so you get the idea....
Instantiating the object :-
var dtl = new DynamicTableList("table1", $ {myObject.allFieldsAsJavaScriptArray}, true, true, true);
My javascript class DynamicTableList, note the dtl javascript object instance variable being referred to in the addRow function. How can I avoid this???
if (showDelete) { var cell2 = document.createElement('TD'); var inp2 = document.createElement('IMG'); / ************************************************** ***********************************************/ inp2.onclick=function(){dtl.delRow(this);} // Have to specify dtc!!!!!!!! / ************************************************** ***********************************************/ inp2.title='Delete' inp2.alt='Delete' inp2.src='images/delete.gif' cell2.appendChild(inp2); row.appendChild(cell2); }
...
tbody.appendChild(row);
this.processRows(); };
this.moveRow = function(node, vector) { }; }
Obviously the code dtl.delRow(this); is being dynamically generated, but how do I replace the dtl instance name with something that'll work whatever the user of this class calls the instance of it!
I am embedding Spidermonkey in a C app. and I'm having trouble setting class (not instance) property values. For example, I am setting up the class as follows:
The above code correctly (verified through a JavaScript program). creates a new class with the Prop1 class property.
The following code correctly adds an _instance_ property:
jsval val = INT_TO_JSVAL(42); JS_SetProperty(cx, proto, "MyProp2", &val);
After three days I still can't figure out how to set the value of the class property, or, for that matter, create a new class property with a particular value. I am looking to do something like this:
jsval val = INT_TO_JSVAL(88); JS_SetProperty(cx, ???, "Prop1", &val);
i'm looking for the best way to use global properties that defined at class level insid event handler functions.
for example : function MyClass() { this.v1 = "hello"; this.v2 = {name: 'joe', age:'30'}; this.link1 = $("<a/>", {id: "link1"});
[Code].....
actually, in link1Handler 'this' returns to link1 not to main class. so how to get class properties or functions inside the private functions of the same class?
how the class attribute works in CSS: I can specify that every attribute with class="foo" be italicized with: .foo {font-style: italic;}
What if I want to do the same sort of thing in Javascript? Is there something built-in like document.GetElementsbyClass("foo").style = "italic" (I'm just making this code up of the top of my head, I don't know how javascript works.)
It seems to me that with JavaScript you're supposed to use the name="" attribute instead of class="". Why the diference?
I looked at webmonkey that had an article about this, but their writing style is simply confusing and I can't make heads or tails of their articles.
Not sure if this fits in JavaScript, but I remember seeing some sites where you would right click an image to see the location properties, and the url that was stated was not where the image was actually hosted and they were essentially cloaking the url. How would you go about doing that? I realize doing this you can still get the image url via other methods, but still interesting in knowing.
how to add extra properties to html elements as I was storing data in html attributes. After looking at some others code including Raphael and this addEvent code. [URL] They seem to treat objects just like an array. obj[property] = value; This would have been extremely helpful to know previously as I have needed to be able to include variables in property names - but have resorted to making the whole thing a string and calling exec() on it.
What trying to achieve is to have a div which when you mouseover a div and h4 within will change properties.This is working but when you mouseover the div and pass over either the border of the containing div or the h4 text the animate/fadeTo repeat again. Is someone able to tell what Im doing wrong? Also you may notice the function is effecting more than one container div at a time which is not what Im going for. Is there a way to seperate them like this or somehow?
I have a form with a list of things. The number of things in the list is variable, depending on certain factor, different things, different numbers of things. Next to each thing is a radio button.
There is a question with two radio buttons, "yes" and "no".
When "no" is selected, I want the radio buttons to be disabled, and the color of the text to change to gray.
For the radio buttons, I have a simple JS function:
javascript Code:
function enableCFFID() { document.cartform.cffid.disabled=false; }
[Code].....
For the test that goes with each thing, obviously I don't want to have to assign unique ID (perhaps in a span tag that encloses the text). I would want a common name for all of them.
But this would mean I can't use getElementById.
What other method can I use to change the class for a group of span tags who's number is variable?
I have created the no.of div tags in my website applications. Now i want to change the class name of the tags. How should I? Below is some code which i want to change:-
I've been going out of my mind trying to get this to work, and now I'm out of time! It seems like it *SHOULD* be simple! All I am trying to do is get all of the <li> items that belong to a particular UL ID, and change the class name onmouseover. I've cut down the code to bare-bones to try and isolate the problem. I can get it to work if I use unique IDS for each list element, but that seems silly. The latest piece of code I am working with:
<script type="text/javascript"> var mylist=document.getElementById("mylist") for (i=0; i<mylist.childNodes.length; i++){ if (mylist.childNodes[i].nodeName=="LI") { mylist.onmouseover=function() {
I have a drop down menu with a few options of delivery method. One option is "other" and when a user selects other a new text box appears for them to specify. this is using javascript to change the css class of the div containing textbox. all this works fine and user can change between options resulting in textbox appearing when selected other and disappearing when selecting anything else. however if the user selects other and enters text into textbox then chages their mind and selects a new option the textbox will disappear but the value that was entered remains the same, i need to default when textbox is hidden to reset value.
