I am trying to add onclick event handler to many objects but I can't understand why it doesn't work. To assign event handler I use traditional approach as described in [URL]Heres the code (extract.js):
Code JavaScript:
//the class
function extract(){
[code]....
I know that both select tags don't have options, but I generate them with JS because they hold sequential numbers and this part has no impact on the problem at hand.Both functions help select next or previous index in a given select tag for greater comfort
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.
This is not the way I want to handle events. I checked MSDN and it seems to indicate that the first way should work. Is there something I can do to get the first way (event handlers?) to work in IE5?
I have a script in which a function launched by a START button continuously calculates and writes a value to a text box. The calculation is done in a for loop. In the loop is a conditional that is a global variable, a boolean. If the boolean is true, break ends the loop (or is supposed to!). A STOP button has an onclick function that sets the global variable to true.
What happens, though, is that the function for the STOP button is not executed until the for loop reaches the maximum value set for i. Anyone know how you can get one button to stop a process started by another?
Is it necessary to return a value from the event handlers? For instance, what does the return value in the following code signify? What will be its impact if it returned otherwise (true)?
<html> <head> <script type="text/javascript"> function BodyClick() { // How to access the event object here? alert(window.event.shiftKey); } function WindowLoad() { document.body.onclick = BodyClick; } window.onload = WindowLoad; </script> </head> <body></body> </html>
It does not work in FireFox. How to make it work?
My only requirement is that I need to assign the BodyClick() handler dynamically in script (not statically in HTML). So I cannot use this solution: <body onclick="BodyClick(event)">
I've been teaching myself javascript and I'm a bit confused about the whole events business. I've been reading the Sitepoint book (among a bunch of others) and when it gets to Ch 4 things get down right confusing. They claim that inline event handlers are "so 1998", something I've heard before and then they proceed to write some pretty complex library files to get around the fact that IE <= 7 doesn't support much of the alternative ways of handling events--a familiar enough story. Anyhow, it seems that many many tutorials all over the internet (and countless pages) resort to inline event handlers as the standard. So, I'm confused. I obviously need to know inline event handlers if I intend to work as a web developer even though it's so 1998. Obviously inline even handlers are not quite on par with inline font attributes and transparent gif files despite the language one often hears. Can someone set me straight, and if possible suggest a brilliant tutorial, book chapter, or website that lays everything crystal clear for me?
I wanted to add a onclick event handler to an image in a loop cos I have a dynamic number of images. The problem is I also need to pass a parameter. This works in Opera 8, but doesn't work in IE:
document.images[i].onclick = "javscript: ShowDesc(" + i + ");";
I've been reading this page on accessing event handlers and avoiding the inline ones. Suppose I want to hover over a link and make it display something else, I thought this is what I would put in the <head>:
<script type="text/javascript"> var x = document.getElementById('question'); x.onmouseover = function() {document.getElementById('answer').style.display='inline'} x.onmouseout = function() {document.getElementById('answer').style.display='none'} </script>
The HTML being:
<a id="question" href="#">Question</a> <span id="answer" style="display:none;">The answer is 42</span>
I've reread the article in the link but to no avail, I don't know what is wrong.
I am really hoping someone is willing to take the time to read this post and take a minute to take a look at my code. What is happening is there are some matches for a script I made and then an area for segments during an event. If you notice on the segment part of the form is that there is a dropdown that asks for where in the event that segment needs to go. With the Introduction or the different numbered matches. What I need to happen for a subArray I need it to take the introduction, all the matches, and all the segments and order them accordingly. With the introduction first, the matches in order based off there match number and then the segments in between the introduction or matches based off the user's input.[URL]..
<HTML><SCRIPT LANGUAGE="JScript"> function mouseclick() { alert("I was clicked on " + window.event.srcElement.tagName); } </SCRIPT> <BODY <H1>Welcome!</H1> <P>This is a very <B>short</B> document.
</BODY> </HTML>
The above script works fine in IE But not in Netscape 7.2 :((
I have written a script that gets trigered by IE's toolbar button. In this script I would like to asign an event handler to an element of the document currently open in IE. The way one access the document object from a toolbar button script is:
var doc = external.menuArguments.document;
Now assuming the document has an element called TextArea1, the logical thing to do would be:
parentwin.document.all('TextArea1').onkeypress = new Function('window.alert('asdf');');
Which goes compiles and runs, except the event handler does not get triggered.
Another trick i tried is as follows:
var s = parentwin.document.createElement('script'); s.text = 'window.alert('asdf')' s.htmlFor = 'TextArea1' s.event = 'onclick' parentwin.document.scripts[0] = s;
I want to build a table that knows where it has been clicked. I found the following solution myself. Are there better ones?
http://www.student.oulu.fi/~pkarjala/question1.html (tested on Mozilla 1.7.8/Linux)
It sets the event handlers for each TD in the build() loop, including a parameter in the function call that is different for each TD.
The whole thing is a simple example with a table with 5 by 5 cells. If you click on a cell it's supposed to change color. Naturally, my question is one more general terms. How to make big tables that associate various event handlers with various cells, and where you will know exactly which element triggered the event? How to make it simple and maintainable?
I am writing a javascript code that parses dom and finds event handlers attached to mouseover events. Then i will replace the existing handler say B() with my own function say A(). When the event happen and control comes to my function A(), after doing required processing i will call B() as shown below
<a href = "abc.com" mouseover = "B();"link </a>
while parsing i will have (trimmed down version)
var oldHandler = node.onmouseover; node.
function A() { / * my code */ oldHandler.call(this); }
This was working fine as long as B() was a global function. I started getting problems when B was a member function. For eg:
function Alerter(text) { this.text=text; var me=this; this.invoke=function () { alert(this.text); } } var sayHi = new Alerter('Hello, world!');
The web developer would have code like <a href = "abc.com" mouseover = "sayHi.invoke()"link </a>
But this time around, my function A() fails since although i have handler to sayHi.invoke(), it has to be executed in correct context. Other wise "this.text" is giving me error because when i say oldHandler.call(this), i am executing the sayHi.invoke() with the html element being passed as this.
I want to create a HTML Table and correspondingly have 2 buttons. One would be add button and other would be remove button. I have few text boxes where I will fill the data and later on clicking Add these text boxes details would be added to the Table. I am using javascript code to handle the event (on click event handler) Similarly I wanted to delete an entry from the table. This is where I am having a problem. The requirement is: In the table if I click on any row I want that row to be highlighted. I can use any color to highlight the row. Then on clicking Remove Button I want to delete that row that is highlighted. I am unable to solve this as I dont know what event handler to use to perform this action and also how to code for this. I am not sure about the events the HTML table can handle and how the selected row can be deleted.
When I register an event handler directly into the HTML tag everything works fine, but I'm trying to register them from the external JS file where the function is, and that doesn't work at all. I've read that this is called the "traditional method" and that it should work.
I've tried it a million different ways, but what I'm putting below AFAIK is correct... but it just doesn't work. I've tried it in Firefox, IE, and Chrome - and used the "Inspect element" feature in Chrome, and am not getting any error messages.
Here is just a simple example of what I'm trying to do - its extremely basic, I know, but I just can't figure out why it won't work.
HTML:
JS:
(Again, it works perfectly when I stick the onclick="message()" event handler directly into the HTML h1 tag, but not when in the external file.)
I'm trying to figure out a way to put this in all js code with the onclick event handlers and the parameters. I have 3 links that switch the style of my page. Right now I have them working with inline event handlers. Here are my code snippets below.
I'm trying to create links that onclick sort a table by title, author, etc. How would I pass an argument to an event handler? Right now, it just executes the sort function. It doesn't wait for me to click the link.
I am new to HTML and I am finding HTML and javascript extremely interesting. I have a problem at hand and I wanted to know how to solve it. I want to create a HTML Table and correspondingly have 2 buttons. One would be add button and other would be remove button. I have few text boxes where I will fill the data and later on clicking Add these text boxes details would be added to the Table. I am using javascript code to handle the event (on click event handler) Similarly I wanted to delete an entry from the table. This is where I am having a problem. The requirement is: In the table if I click on any row I want that row to be highlighted. I can use any color to highlight the row. Then on clicking Remove Button I want to delete that row that is highlighted. I am unable to solve this as I dont know what event handler to use to perform this action and also how to code for this. I am not sure about the events the HTML table can handle and how the selected row can be deleted.
I'm trying to retrieve the "onchange" event handler for a Select that I've retrieved via a call to getElementById() and when I view the element in FireBug there is no value for onchange.
I know the handler is part of the Object because it runs like it is supposed to earlier in my program run, but when I try to retrieve it later through the getElementById(), it's not there.
Do the event handlers get passed with the getElementById() call?
I am dynamically creating page elements by looping through an array and adding them to the DOM. Each element has an action that should be performed when it is clicked. This action (or a reference to it) determined by the current array value as well. Because the code called in the onclick handler is not executed until the event fires, the value of the current array item (at the time the onclick handler is attached) is not preserved resulting in the expected behavior not happening.Here is an extremely simplified example of the problem I'm facing:
Code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
I recently "inherited" a project which involves an applet on a web page, and some Javascript event handling functions. The handler definition looks like this:
where Foo is an applet with parameter FiresScriptEvents set to TRUE. The function Foo_mouseReleased() is a simple javascript function that just alerts a fixed message so I know it's been called.
When I run this applet in a vanilla IE5.5 or IE6, it does exactly what I expect - when the mouse is released, up pops my alert. BUT when I run it on the same browser with Java Plug-In 1.4.2 installed, I don't see it. Is there some compatibility issue with 1.4.x? Can the code be changed relatively simply to work with both VMs, or am I looking at a big rebuild to support browsers both with and without the plug-in?
THE QUESTION: How do I get a reference to my Object when processing an event handler bound to an html element ?
CONTEXT: Sorry if it is a bit long.
I am developing a JS calendar tool. One of the requirements is that the calendar will need to display a varying number of months (1..3) depending on the calling page. Imagine 1, 2 or 3 calendar pages side by side as required.
I have built a grid object that will contain one month's dates with the day names at the top. The calendar object inherits the grid object as an array of "calendar pages" - one grid per month and the calendar provides the content for each grid. I will use the grid object for another completely different object later and so I want to use good OOP encapsulation. The grid is a table generated on the fly and is "dumb" as far as what it is used for.
I have attached an onlick event to each cell of the grid. Using OOP priciples I want the calling program (the calendar object in this case) to provide a function to handle the click and the grid object will provide to the calendar the row and column of that cell as well as the grid number (so the calendar can work out which date was clicked since it knows what the data means and the grid doesnt). Code:
Trying to add new HTML elements to the document using the jQuery append() function it seems it doesn't add event handlers to the newly created elements.jQuery only seems to add these in Internet Explorer:
