Passing Anonymous Function From SetTimeout() - IE Doesn't Like - FF Does

Jun 6, 2009

I did search the forums but couldn't seem to find anything on this specifically. I basically need to pass a key event and a 'name' to nameCheck() after 3 seconds. This works fine in Firefox but Internet Explorer gives the error: Member not found. I'm more of a PHP guy than a JS one

<input type="text" onkeyup="nameCheckTimer(this.value, event)" value="" />
function nameCheckTimer(name, evt) {
setTimeout(function(){return nameCheck(name,evt)}, 3000);
}
function nameCheck(name, evt) {
//need name and the key event to be available here. I have code to handle the key codes which works fine
}

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Passing 'this' To Anonymous Function In Event Listener

Jun 10, 2010

I'm working with nested functions and trying to pass a 'this' value to an anonymous being used in an assignment for an event listener.So, this should plop a button inside our DIV and when clicked I'd like it to run the alert-ding; unfortunately it seems to want to run the function as defined under the buttons object which doesn't work out too well.

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JQuery :: Calling An Anonymous Function?

Feb 3, 2011

I have a problem with understanding jQuery. In my case I have this JS file with following content (see below). This is an anonymous function, isn't it? The problem is this line:

[Code]...

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Getting Return Value From Post Anonymous Function

Jan 8, 2011

I have been struggling with a form wizard all day. I'm using jquery stepy (form wizard) along with validation plugin. To cut a long story short, my first step is to get MySQL connection from form controls details. On submit ('next' button) a check is made on an empty hidden control ('hid').

rules: {
hid: {
required: function(){
return checkDBData();
},
messages: {
hid:
{required: 'SQL not available'},
...(etc)...

So, if the function checkDBData passes, false should be returned, so that the form can progress to the next step. If the connection details fail, true is returned so that an error msg is posted.

Here's the checkDBData function:
function checkDBData(){
var host = $('#mysql_host').val();
var username = $('#username').val();
var password = $('#password').val();
var dbname = $('#dbname').val();

$.post("install/sqlcheck.php",
{"host": host,"username": username, "password": password, "dbname": dbname},
function(msg){
if(msg.required == false){
return false;
}else{
return true;
}},
"json"
);
}

The return values don't find their way back to the rules. However, if I hard code false and true to the function...
function checkDBData(){
var host = $('#mysql_host').val();
var username = $('#username').val();
var password = $('#password').val();
var dbname = $('#dbname').val();

$.post("install/sqlcheck.php",
{"host": host,"username": username, "password": password, "dbname": dbname},
function(msg){
if(msg.required == false){
return false;
}else{
return true;
}},
"json"
);
return false; //or return true for testing purposes
}
This works. I assume it's due to the asynchronous nature of the ajax call.

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Creating Anonymous Function With Variable?

Mar 20, 2010

I'm having trouble with something that I can't explain outside of an example. Code:

Code:
$js_info_tabs = json_encode($valid_array);
$script = <<<JAVASCRIPT
<script type="text/javascript">//<![CDATA[
function changeTo(id) {

[Code]....

I have the code this way in order to consolidate it since I would prefer to do that instead of checking the selected ID and manually checking against all possible IDs (which works flawlessly, it just takes up about 5x the lines and is not modular). What I have above also works, but there is one fatal flaw:

It seems like the anonymous function that is the onclick for each unselected element becomes "return changeTo(tab + '_id')", but I don't want it to be that. I want the argument to actually be what tab is instead of the variable.

What ends up happening is that after changeTo() is called for the first time, any element you click will result in the last element being the selected one, as if it's using the final value of tab as its return value.

This doesn't make any sense, though, since tab is local, and deleting it before the function exists doesn't work. Deleting elem at the end of the for loop doesn't work. I honestly don't understand what's going on or why it doesn't set the new onclick value correctly.

Basically I just want changeTo(tab + '_id'); to turn into changeTo('MYID_id'); instead, but it simply doesn't do that and I can't figure out a way how.

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Giving AddEventListerner An Anonymous Function?

Nov 3, 2011

var name = "good";
load_image( name );
function load_image( name )

[code]....

I've tried giving addEventListerner an anonymous function

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Passing Values With This Keyword Using SetTimeout

Jun 14, 2010

This following script changes style when mousing over a paragraph:
Code:
<html>
<head>
<script type="text/javascript">

[code]...

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Passing Var Valuable To SetTimeout Not Working?

Sep 8, 2010

I hav a setTimeout at the tail end of a function. On time out I am running a function and passing argument values but they do not seem to be passing to the setTimeout.

For example (snippet from full code to save you time)

Code:

var billboard_number_new = 3;
setTimeout("rw_billboard_num_chooser(billboard_number_new)", 5000 );

Even if I test with an alert it still will not acknowledge the value of billboard_number_new

Code:

var billboard_number_new = 3;
setTimeout("alert(billboard_number_new)", 5000 );

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Returning ResponseXML, Set Within An Anonymous Function, Only Once ReadyState = 4

Dec 4, 2006

I have several functions with code along the lines of:

var xmlDoc = requestXML("ajax.asp?SP=SelectRelatedTags&tag=" +
array[i]);

The requestXML() function includes the code:

var xmlDoc = null;
http_request.onreadystatechange = function() {
if (http_request.readyState == 4) {
if (http_request.status == 200) {
xmlDoc = http_request.responseXML;
} else {
alert('There was a problem with the request.' +
http_request.status);
}}};
http_request.open('GET', url, true);
http_request.send(null);
return xmlDoc;

However, the last line (the return) executes before the readyState
reaches 4. How do I return the xmlDoc to the functions only once the
xmlDoc has been assigned? I tried putting the return statement in a
while loop with the condition that the readyState must = 4 - this
worked, but makes the browser popup a message saying the script is
slowing down the system.

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JQuery :: Pass Reference To An Object To Anonymous Function?

Aug 2, 2010

I would like to know how to pass in a reference of this to anonymous function so I can access parameters from anonymous. Here is my code:

[Code]...

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When Closures, Loops, Function References, And Anonymous Functions Interact

Oct 16, 2010

I am confused about the true difference between the two below examples.

first example:

// Demonstrating a problem with closures and loops
var myArray = [“Apple”, “Car”, “Tree”, “Castle”];
var closureArray = new Array();

[code]....

Here we iterate through the length of myArray, assigning the current index of myArray to theItem variable. We declare closureArray 4 times as an anonymous function. The anonymous function in turn declares the predefined write() function, which is passed parameters. Since write() is in closureArray() a closure is created??? During each iteration, theItem is reassigned its value. The four closures reference this value. Since they reference this same value and since this value is reassigned ultimately to the value of the fourth index position, tHe time we execute closureArray later on, all four closures output the same string. This is because all four closures are within the same scope "the same environment" and therefore are referencing the same local variable, which has changed.

I have a couple of problems with this example:

1) I thought a closure is a function that is returned - the inner function is not returned above.

2) theItem is not even a local variable of the parent function (closureArray) - I thought in order for a closure to work, the inner function only accesses the local variables of the outer function, but in this case the local variable is defined OUTSIDE of the parent function.

3) the "the four closures are sharing the same environment." The thing is even in the second example, they are sharing the same environment.

Second example:

// A correct use of closures within loops
var myArray = [“Apple”, “Car”, “Tree”, “Castle”];
var closureArray = new Array();

[code]....

Here we iterate over the length of myArray (4 times), assigning the index of myArray to theItem variable. We also return a function reference to the closureArray during each iteration (closureArray[i]), where i is index number so we assign 4 functon references. So when we iterate through myArray, we immediatelly call the writeItem() fucntion passing an argument of theItem at its current value. This returns a child anonymous function and when that child function is called, it will execute a block that calls the predefined write() method. We assign that returned anonymous function to the variable closureArray. Hence, closureArray holds a reference to that anonymous function. So closureArray during each iteration holds a reference to the anonymous function and we later call closureArray, which in turn calls the anonymous function, therefore calling the predefined write() function to output the local variable of the parent function. This outputs each distinct index of myArray.

This is because since we created the closure, when we call writeItem, passing theItem argument, since theItem is a local variable of the parent function of the closure, it is never destroyed when we later call closureArray (the reference to the child anonymous function)? Yet weren't we using a closure in the first example as well? So whey wasn't those variables preserved?

I don't think it has anything to do with assigning a returned anonymous function to closureArray. Even though an anonymous function creates a new memory position in the javascript engine, therefore not overwriting the other function references we create during the iteration, it's still referring to a local variable declared outside the reference. So if it's about the closure retaining value of parent's local variable even after exiting the parent function allowing for the current indexes to be preserved, then why did the closure in the first example fail to retain each index?

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Create An Anonymous Function For Onchange Event Of File Field?

Feb 28, 2010

I am trying to create an anonymous function for onchange event of file field, so that when a file is selected, the covering text field gets that value. I know how to accomplish this by adding onchange="", but I'd prefer not do that. The code that I have almost works, except that the function in the for loop can't call on the "i" variable that the loop uses.

for( i = 0; i < source.length; i++) {
source[i].onchange = function() {
name[i].value = this.value;
}
}

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JQuery :: Related To Setting Global Variables From Anonymous Function (valid = False;)?

Oct 22, 2010

//<input type="text" id="s_field" value=""/>
var valid = true;
var div = $("#s_field");
$.post("index.php",{id: 6}, function (data){

[Code]..

When posting data, and getting response need to set valid to false - email is not valid.

1. in function it alerts valid is false
2. outside function it says valid is still true!

even i didn't wrote var valid = false;, but valid = false;I need to set Global "valid" variable to false.

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Accessing Class Member Using This Inside An Anonymous Function Call In A Class Method?

Mar 28, 2010

I'm using jquery to make it easy for AJAX calls.

So I create a class: function cMap(mapID){//vars and stuff}

I go and prototype a function: cMap.prototype.loadMap = function(){ //jquery AJAX call }

Now in the jquery $.ajax({...}); call, I use an anonymous function on the "success:" call: success: function(data){ this.member = data; }

My problem is that inside this anonymous function call I'm trying to call a class member of my cMap class to store the data in from the AJAX call, but it's out of scope. So the JS console in FF/Chrome throws errors about bad value/doesn't exist.

How can I access this class member from inside an anonymous function? Or at least what's a good way to go about doing all this?

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Settimeout Function In Elements Mouseout Function

May 10, 2006

I want to change the elements class name dynamically when mouse is out with respect to that element.I want to change the class name after some delay (i.e, i am using settimeout function).

var ulNodes = getElementsByClass("nice-menu");
var liNodes = null;
for(var i = 0; i < ulNodes.length; i++) {
liNodes = ulNodes[i].getElementsByTagName("li");
for(j = 0; j < liNodes.length; j++) {
if(liNodes[j].className == "menuparent") {
liNodes[j].onmouseout=function(){
timer = window.setTimeout(function (){
this.className = "menuparent"; //My problem is with //this line
},4000);
} } } }


I need to set the elemets class name to "menuparent" after some delay after the pointer moves away form that element.

-> When ever i say alert(this.className); in the setTimeout function, the alert box says undefined.
-> I can succesfully alert any where else in the mouseout function except within the settimeout function in mouseover function of that element.

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Use SetTimeout In A Function?

Sep 13, 2011

I want to design a page flashes 4 digits when loaded, press submit to stop, and starts when press again.Below is the script:

Code:
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

[code]....

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Multiple SetTimeout In Function?

Oct 10, 2006

I'm not exactly sure why this doesn't work. I'm basically just trying a
simple approach at a slide down div.

function slide_div {

setTimeout("document.getElementById('mydiv').style.length=ཆp x'",1000);

setTimeout("document.getElementById('mydiv').style.length=ཐp x'",1000);

setTimeout("document.getElementById('mydiv').style.length=ཚp x'",1000);

setTimeout("document.getElementById('mydiv').style.length=ཤp x'",1000);

setTimeout("document.getElementById('mydiv').style.length=཮p x'",1000);

setTimeout("document.getElementById('mydiv').style.length=ླྀp x'",1000);

}

It seems like it just runs the last setTimeout line and pops out all at
once. I've even tried adding a=, b=, c=,. etc at the begining of each
line to no avail.

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Function As A Function's Parameter Like SetTimeout()?

Mar 7, 2011

How can I have a function parameter in a function?

Something lke setTimeout();
setTimeout(function() {
how can I do it like this?

[code]....

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SetTimeout() Function Not Supported In An IE Version

Jul 30, 2009

does anyone know if the setTimeout() function in js has been just recently supported? i created an online demonstration of a product that uses this function to delay the playing of .wav files after various second intervals. i know that Opera doesn't support this function because when I click my button, all of the .wav files that i have in the function that runs behind the button play at once. i have probably 10 wav files that are played throughout the function, at various conditional statements. does anyone know if earlier (like REALLY old) versions of IE do not support this function? or maybe ie8 doesn't support it? i developed this and tested it in all major browsers except IE8 and any version earlier than IE6.

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Passing A Variable From Php To Script Doesn't Work / Sort It?

Jun 21, 2010

I have this part of php code...

when I click an unitid, The alert message doesn't work

what's wrong? (i'm newbie to javascript/php/....)

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Passing The Width And Height Into The Dialog Box But It Doesn't Take The Variable?

Aug 26, 2009

Code:

$('.openDialog').click(function(event){
var width=$(this).attr('width');
var height=$(this).attr('height');

[code]...

I'm trying to do something like above, where I pass the width and height into the Dialog box but it doesn't take the variable.It only works if I put an actual number here instead of a variable.

$('#dialog').dialog('option', 'width', width);

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Window.setTimeout With Confirmation Message Function?

Jan 16, 2010

I am trying to use the window.setTimeout feature so that a message pop-up with yes/no appears on the screen asking whether to extend the session.*If yes is clicked, the current page reloads.*If no is clicked, nothing happens. (the session will expire anyway).

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JQuery :: Function With Multiple Parameters As Argument In SetTimeout

Feb 22, 2011

I have written the following code (quite meaningless. Just to check why setTimeout is not working in a similar real-life code) to enable the user to input a given time interval (hh:mm:ss) when a p is clicked, and then alerting the user with the time entered in the seconds portion one second after the div is clicked. But it is not working. I think the setTimeout is the culprit, the way I am passing parameters to the function inside it, but don't know where exactly am I erring.

<html>
<head>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">

[Code]....

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SetTimeout For Script Function Error ID Not Defined / Resolve This?

Oct 31, 2010

I have a button that when you click it displays the results of my db in a div. What I am trying to do is to get the results to update every five seconds.

I thought setTimeout was the best way to achieve this. However I am getting the error message that ID is not defined on the setTimeout line. I thought it would automatically input ID into the fields marked ID when the onloadXMLDocRefres ('File.php','txtHint') button is clicked?

The button works to load the script, but the refreshing the div is not.code...

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Function Defined In Global Scope Not Being Called By SetTimeout

Feb 2, 2011

I wanted to write my own script for a fade-in animation, since the ones I have found have got too many options or need some framework, which makes them unnecessarily big. I wanted to learn too.Unfortunately, the code didn't work as I wanted, and I commented some things so as to find out what's happening.Why is an object reference assigned to what was previously a string?

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Simple Animation - SetTimeout Function And Paint Method

Dec 24, 2009

I'm trying to graph line with a delay between each line drawn - my code is:
var jg = new jsGraphics('Canvas');
jg.setColor('maroon');
jg.drawLine(40,130,80,120);
setTimeout('jg.paint()',10000);
jg.drawLine(80,120,120,110);
setTimeout('jg.paint()',10000);
Unfortunately it draws all the lines at the same time i.e the setTimeout function doesn't like the paint method.

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