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JavaScript - Get Variable Name Of An Object From Inside The Object
Hello.
Is there any way to get the variable name of an object from inside the object? E.g. PHP Code: function Bla(){ this.write = function(){ document.write(<objectname>); } } obj1 = new Bla(); obj1.write(); //Outputs obj1 Here is my script: PHP Code: function myTimer(seconds, obj){ this.seconds = seconds; this.obj = obj; this.startTimer = function(){ if(this.seconds>0){ this.seconds--; this.obj.innerHTML = this.seconds; this.timer = setTimeout("Timer.start()",1000); } } } Timer = new Timer(10, obj); Timer.startTimer(); Now the problem is that the variable that contains the object must be named "Timer". This way I cannot create new timer objects with different variable names I have tried: this.timer = setTimeout("this.start()",1000); but it doesn't work. That's why it would be good to detect the variable name and instead use something like this: this.timer = setTimeout(varname+".start()",1000); I would rather not have to pass the variable name through a parameter like this: Timer1 = new Timer(10, obj, "Timer1"); Thanks in advance. Similar TutorialsHi, every time I try and alert: [ { number:0, secondnumber:0 }, { number:2, secondnumber:1 }, { number:1, secondnumber:2 } ] it just shows [object object], [object object], [object object]. Why is this and what can I do to make the record be shown as it is above in an alert? Thanks. I have created this svg color picker : Edit fiddle - JSFiddle I want that each color can be clicked and if each of them clicked, it will rotate the selected image to the top while the rest of the color will be moved accordingly clockwise (like a wheel). I have something that's called with AJAX when the user enters some text (http://askvoke.com). What I want is to execute some javascript within this "frame". If the frame calls something, with say
Code: <script type=\"text/javascript\">
document.write('h');
</script>
in it, then "h" doesn't appear, and neither does anything besides what would normally be shown if I didn't add that. Anyone have a solution? Here's my object constuctor: Code: function suggest_object(result_id)
{
this.in_result_div = false;
this.search_element = document.getElementById(result_id);
}
And the execution code: Code: var suggest = new suggest_object(result_id);
document.getElementById(result_id).onmouseover = function(){suggest.in_result_div = true;}
It works as is, but i'd really like to be able to set the onmouseover inside of the object. Something like Code: function suggest_object(result_id)
{
this.in_result_div = false;
this.search_element = document.getElementById(result_id);
this.input_element.onmouseover = function()
{
this.in_result_div = true;
}
}
So how can I get the 'this' inside the onmouseover function to refer to the object? I created a method for displaying an object's properties: Code: renderfunction = false;
function showProperty (object, property)
{
document.write ('<td class="type">' + (typeof object[property]) + '</td>'
+ '<td class="name">' + property + '</td>');
document.writeln('<td class="value">' +
(
(typeof object[property] != 'function')
? object[property]
:(
(property != 'showProperties')
? (
renderfunction
? object[property]()
: ('<span class="self">NOT RENDERED</span>')
)
: ('<span class="self">THIS</span>')
)
)
+ '</td>');
document.writeln('<td class="hasOwnProperty" >'
+ (
object.hasOwnProperty(property)
? "Local"
: "Inherited"
)
+ '</td>');
if (typeof object[property] == 'function')
{
document.writeln ('<td class="function">' + object[property] + '</td>');
}
else
{
document.writeln ('<td class="function"> </td>');
}
}
As long as renderfunction = false, the object is fine coming out of this function. However, if I change renderfunction to true, all my properties become undefined. Why isn't this working as I expect it to? How should I fix it? Thanks in advance, -Brian. I can't get any info from Firebug except that one line, uncaught exception [object Object]. The code fully worked, then I needed to make it dynamically create Sortables from the scriptaculous library based on how many X were in a table in my database, which I've done, and I'm thinking it may be a simple slight parse error of some type, I'm not too good with Javascript, because now my script barely works. I've double checked the script's source code, the PHP variables are exactly what they should be. Code: print<<<HERE
Sortable.create('sortlist$box', { tag: 'img', overlap:'horizontal',constraint:false, containment: $list, dropOnEmpty: true,
onChange: function(item) {
var list = Sortable.options(item).element;
if(changeEffect) changeEffect.cancel();
changeEffect = new Effect.Highlight('changeNotification', {restoreColor:"transparent" });
},
onDrop: function(item) {
var thing=Sortable.options(item).element.identify();
var anchors = document.getElementById(thing).childNodes.length-2;
if(anchors > 20){
alert('This box had 20 creatures in it already, your last action has not been saved.');
window.location.reload();
}
else{
new Ajax.Request("saveImageOrder.php", {
method: "post",
parameters: { data: Sortable.serialize("sortlist$box") }
});
}
}
});
HERE;
$box++;
}
?>
});
</script>
if you solve this I'll send ya $10 via paypal Hello together! I generate html code with jsp. In that jsp there a several framesets and frames. And yes i know, frames are not really up to date but it's an old program and i have to deal with it now. Anyway, in the top frameset i have an onload attribute like onload="load()". In the function load i want to access the Element.prototype object. But unfortunately typeof Element gives me "undefined". So i looked a little deeper and found that window.toString() gives me "[object]" and not as expected "[object window]" so somehow my window doesn't know that its construcor is Window. window.construcor is "undefined" as well. And i don't have access to the Element object. I really don't know where the error could be. When the page is loaded and i access the same window over the console, then everything is right. But in my function a can't get access to the objects i need. I also don't know what part of the code could be useful to post here, but maybe someone had a similar problem before? i should say that this problem only occurs in IE8. In IE9 it works perfectly. Has anyone any idea?? Hi all, I'm stumped on finding a way in javascript to create an object factory whose instances are also object factories. In short I want something like that below, but no joy ... any clues? Code: function createClass () {
return new createClass()
function createClass() {
return new createInstance ()
function createInstance () {
//Default properties, values and methods which might later be extended
}
}
}
var createDoor = createClass();
var door1 = createDoor();
var door2 = createDoor();
var createChair = createClass();
var chair1 = createChair ();
var chair2 = createChair ();
Ignore post (if mod, please delete)
I'm writing a program that involves a network of interconnected nodes (or simply objects in my example below). It depends on being able to access properties of an object's linked objects (a bit oddly worded, sorry)... Problem is I'm not sure how to properly access those properties... see below please. <script> //This is an example of a problem im having in my own code... //I want to access the name of the object within the links array wintin the object... var objA = {name: "Object A", links: [objB, objC]}; var objB = {name: "Object B", links: [objC, objD, objE]}; var objC = {name: "Object C", links: [objB]}; var objD = {name: "Object D", links: [objE]}; var objE = {name: "Object E", links: [objD]}; //ex: I want to access the name of Object A's first link... console.log(objA.links[0].name); </script> I'm hoping to get "Object B"... But instead I get: TypeError: Result of expression 'objA.links[0]' [undefined] is not an object. Is there another way around this? Any thoughts are appreciated. ... at least that's what I think I'm trying to do... what I have is this function which reads the JSON attributes of crab_house, a JSON object: Code: $.getJSON( '../map/clients.json', function(data) {
$.each( data. crab_house , function(i, m) {
bizAdd= new google.maps.LatLng(m.lat, m.lng);
var message =m.html;
createMarker(bizAdd,message);
});
but what I would like to do is something like: Code: var bizId='crab_house';
$.getJSON( '../map/clients.json', function(data) {
$.each( data. bizId , function(i, m) {
bizAdd= new google.maps.LatLng(m.lat, m.lng);
var message =m.html;
createMarker(bizAdd,message);
});
is it possible? thanks in advance... Hi the Is it possible to probe the name of the variable assigned to an object instance in JavaScript? For example: Code: function house(){
}
var bobhouse=new house()
if (instancename=="bobhouse")
//do something
In other words, can I do some sort of string comparison on the variable name "bobname", so I know it's actually called "bobname"? I feel I'm asking how to have a variable recognize itself as a variable. Hello. I have a youtube video that autoplays everytime one opens the webpage containing the video. The only extra parameter that causes the video to autoplay is having the following added at the end of the embed src link: "&autoplay=1" If that is not present or if a zero is present in place of the 1, the video does not autoplay. I would like the video to play only once per session. If one is visiting the webpage a second time, the parameter above should not be present or the 1 should be a zero. I am modifying attempting to modify this code: http://www.javascriptkit.com/script/...2/postit.shtml and I am able to get differnt urls to print on screen depending if it's a first visit or not. Problem 1: I cannot however get this to work in Google Chrome. Problem 2: When I attempt to get the url to be printed inside the embed src [/B]link, which is inside the object tag, the javascript either gets printed or that portion is ignored. I don't know if this is because of the quotations and the way I am handling them or if because javascript cannot be inserted inside an object tag. Here is the code: Code: <html>
<body>
<br><br>
<script type="text/javascript">
//Post-it only once per browser session? (0=no, 1=yes)
//Specifying 0 will cause postit to display every time page is loaded
var once_per_browser=1
///No need to edit beyond here///
/* var ns4=document.layers
var ie4=document.all
var ns6=document.getElementById&&!document.all
if (ns4)
crossobj=document.layers.postit
else if (ie4||ns6)
crossobj=ns6? document.getElementById("postit") : document.all.postit
function closeit(){
if (ie4||ns6)
crossobj.style.visibility="hidden"
else if (ns4)
crossobj.visibility="hide"
} */
var url = "\"http://www.youtube.com/blah/version=3&hl=en_US&fs=1\"";
function get_cookie(Name) {
var search = Name + "="
var returnvalue = "";
if (document.cookie.length > 0) {
offset = document.cookie.indexOf(search)
if (offset != -1) { // if cookie exists
offset += search.length
// set index of beginning of value
end = document.cookie.indexOf(";", offset);
// set index of end of cookie value
if (end == -1)
end = document.cookie.length;
returnvalue=unescape(document.cookie.substring(offset, end))
}
}
return returnvalue;
}
function showornot(){
if (get_cookie('postdisplay')==''){
showit()
document.cookie="postdisplay=yes"
}
}
function showit(){
url = "\"http://www.youtube.com/blah/version=3&hl=en_US&fs=1&autoplay=1\"";
/*if (ie4||ns6)
crossobj.style.visibility="visible"
else if (ns4)
crossobj.visibility="show" */
}
if (once_per_browser)
showornot()
else
showit()
</script>
<b>Outside the Object Tag:</b> <br>
<script type="text/javascript">document.write(url);</script>
<br><br>
<b>In the Object Tag</b>
<br><br>
<object width="570" height="250"><param name="movie" value="http://www.youtube.com/blah?version=3&hl=en_US&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src=<script type="text/javascript">document.write(url);</script> type="application/x-shockwave-flash" width="570" height="250" allowscriptaccess="always" allowfullscreen="true"></embed></object>
</body>
</html>
Below is the code that is using the name FFF in various places. The effect of all this is that the onclick function is not executed. I would expect a pop up alert when clicking the submit button. This only happens if I rename either the form id or the js variable. Can anyone explain what is going on here ? Code: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Title</title>
</head>
<script type="text/javascript">
function newobject(){
this.exec=exec;
function exec(){
alert("exec");
}
}
FFF = new newobject();
</script>
<body>
<form id=" FFF " name="somename" action="" method="GET">
<input type="text" id="someid" name="somename" value="value">
<input onclick=" FFF .exec()" type="submit" id="submitid" name="somesubmit" value="xxx">
</form>
</body>
</html>
Regards Heinz Quote: menu: function( a, b ) { $( b ).observe( 'click', function( event ) { event.stop(); if( $( a ).visible() ) { $( a ).hide(); $( b ).removeClassName( 'selected' ); document.stopObserving( 'click' ); } else { $( a ).show(); $( b ).addClassName( 'selected' ); document.observe( 'click', function( e ) { if( e.target.id != a && e.target.id != b && !Element.descendantOf( e.target, $( a ) ) ) { $( a ).hide(); $( b ).removeClassName( 'selected' ); document.stopObserving( 'click' ); } }); } }); $$( '#' + b + ' > a' ).each( function( element ) { element.observe( 'click', function( event ) { $( a ).hide(); $( b ).removeClassName( 'selected' ); document.stopObserving( 'click' ); }); }); } This work's perfrect accept when i use it with others on the menu it leaves the other ones open, how do i get it to close the open one when i open a new menu.. Thanks. Hey all, I'm using a fairly simple accordion script. When I went to take a gander at the page in IE I found that the onclick function of the script doesn't respond. It works in FF, Safari, Chrome and Compatibility Mode in IE 8 the error message IE gives me is Quote: Message: 'h' is null or not an object Line: 13 Char: 77 Code: 0 URI: http://proposalfor.us/js/script.js The problem line (as far as I can tell) is: Code: this.a[s]={}; this.a[s].h=h=T$$(e,v)[0]; this.a[s].c=c=T$$('div',v)[0]; h.onclick=new Function(this.n+'.pr(0,'+s+')');
Any help would be greatly appreciated! Thanks friends! I am trying to troubleshoot my javascript function below. Code: <script type="text/javascript">
function txtboxfill(fillobj) {
var rChar=String.fromCharCode(13);
var myVal = "To: " + this.form.to.value + rChar;
myVal = myVal + "From: " + this.form.from.value + rChar;
myVal = myVal + "Subj: " + this.form.subj.value + rChar + rChar;
myVal = myVal + "Message: ";
fillobj.value = myVal;
}
</script>
Then I have a text box input field with an Code: <input type="text" id="tp" name="to" size="34" class="totext" onkeyup="txtboxfill(this.form.msg_area);"> and when I enter text in this field it gives me a 'this.form.to' is null or not an object and does not populate the textarea. BTW, msg_area is the id of my textarea. Thank you. Hi All, (Another Post LOL) Ive been getting alot of help with js recently THANKS! One last thing and i shouldnt be on here for a while How would i go about doing this Code: <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="750" height="550" codebase="http://active.macromedia.com/flash4/cabs/swflash.cab#version=4,0,0,0"> <param name="movie" value="SWF/helicopter.swf"> <param name="quality" value="high"> <param name="menu" value="false"> </object> into JS using .innerHTML = "Above Stuff"; I always get an error + i dont know how im going wrong with the quotes :S ANY HELP (GOOD STUFF); Thanks In Advance, Jamie. NOM NOM NOM! Code: function globals()
{
this.states = "";
}
now I can: Code: globals.states = .... how to extend first code to be able: Code: globals.states.something = .... ? Hello, below you will find two objects, background and photo1, which I need help cleaning up a bit. This will eventually be imported using Json but for now during development it sits as is in my script. I need help with a couple things: - You will notice the 'val' property is identical in both objects. How can I move this into an outside function that each object can share? I'm having trouble bc I couldn't get 'this' to work outside of its current context. - Second, how can I restructure this so that I can instantiate a new object. So if I wanted to add a new layer I'd like to do something like importLayers.push[new Layer('photo2')] Code: var importLayers = {
background: {
layerType: 'background',
index: 0,
layerContent: {
content: function() {
return $(element).find('#background_Content');
},
width: 850,
height: 530,
xPos: 0,
yPos: -150,
skewX: 0,
skewY: 0,
angle: 0,
originX: function() { return (this.sWidth() / 2); },
originY: function() { return (this.sHeight() / 2); },
scaleX: 1,
scaleY: 1,
sWidth: function() { return this.width * this.scaleX; },
sHeight: function() { return this.height * this.scaleY; },
aspect: 0,
opacity: 100,
val: function(prop, val) {
switch(prop)
{
case 'width':
if(plugin.constrain)
this.scaleX = this.scaleY = val / this.width;
else
this.scaleX = val / this.width;
break;
case 'height':
if(plugin.constrain)
this.scaleY = this.scaleX = val / this.height;
else
this.scaleY = val / this.height;
break;
case 'angle':
this.angle = val;
}
buildTransformation(this, this.content());
}
},
},
photo1: {
layerType: 'photo',
index: 1,
layerContent: {
content: function() {
return $(element).find('#photo1_Content');
},
width: 1920,
height: 1280,
xPos: 0,
yPos: 0,
skewX: 0,
skewY: 0,
angle: 0,
originX: function() { return (this.sWidth() / 2); },
originY: function() { return (this.sHeight() / 2); },
scaleX: .15625,
scaleY: .15625,
sWidth: function() { return this.width * this.scaleX; },
sHeight: function() { return this.height * this.scaleY; },
aspect: 0,
opacity: 100,
val: function(prop, val) {
switch(prop)
{
case 'width':
if(plugin.constrain)
this.scaleX = this.scaleY = val / this.width;
else
this.scaleX = val / this.width;
break;
case 'height':
if(plugin.constrain)
this.scaleY = this.scaleX = val / this.height;
else
this.scaleY = val / this.height;
break;
case 'angle':
this.angle = val;
}
buildTransformation(this, this.content());
}
},
}
}
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