Avoiding Eval, Properly Referencing Object?
Aug 24, 2011
I'm trying to build a simple "where's the meeting room" page for my work. This consists of a background image of the map, and (right now), a red block absolutely positioned on the map to show where the room is.I'm using an object to keep track of x/y positions for the rooms, i.e.
Code:
var rooms = {
a123: {
x: 100,[code]....
This works, but uses eval() a lot, which doesn't seem like best practice. What's the appropriate way to get the info?Here's the whole page code:
Code:
<!DOCTYPE HTML>
<html>
<head>[code].....
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Jan 5, 2010
An application under development has a set of core functions that carry out common tasks and a 'machine' that animates panels of lists of names and menus and provides another panel for action calls. (see attached pic). Selection of a name identifies object(s) to be worked on and menu couplets like "Name+Edit" call devices (each in a separate js file).
Each js file replaces any files in the deviceScript holder in the hta file. I used to use eval(couplet+"Start")() to initiate the device, but having read about the evils of eval it dawned on me that it was unnecessary and just gave each device a start() function ... and also an optional refresh(), and compulsory finish() to pick up results and clean up.This seems to work well on my machine. The hta is intended to run locally picking up json type data and devices locally and via the net.
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Nov 12, 2010
I am trying to use some really simple jquery in a rails 3 app. I am trying to get a function to run whenever a rails 3 js callback is fired, the function is to add or remove css classes from link elements. But so far I keep getting errors in the console (chrome) stating that the object defined by my css selectors doesn't have the addClass and removeClass methods.Here is my code:
$(function($) {
var resetArtistTabStates = function () {
$("#artist-tabs li a".addClass("current"));
[code]....
The ajax:success event come from rails.js jquery file, which contains the following:
callRemote: function () {
var el = this,
method = el.attr('method') || el.attr('data-method') || 'GET',
[code]....
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Jul 23, 2005
if i have this code: <form><input type=text name="id1"></form> then with
javascript i can reference this with this.form.id1, how can i reference
something like this:
<table>
<tr name="id2">
..
..
</table>
?
this.id2 doesn't work
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Apr 12, 2006
A have an array of objects defined like this:
var collegas =
[{smtp:'alberic.verhelst@king.dom',voornaam:'Alberi c',famnaam:'Verhelst'},
{smtp:'anita.dierens@king.dom',voornaam:'Anita',fa mnaam:'Dierens'}, etc
I iterate over this array with this code :
for (var i = 0, stop=collegas.length ; i < stop ; i++) {
for (var veld in collegas[i]) {
etc
I would like to check whether a particular veld instance's name is smtp. In
code what I want is this :
if (veld.fieldName=="smtp") { do something ...
But this syntax doesn't work.....
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Dec 9, 2010
I have a table which I would like to be highlighted with the click of a button, but I can't seem to reference it correctly. I can make the <td> clickable and function, but when I try to apply it to the button I can't make it reference the td cell, rather than change the background color of the button.The function is:
function roll(obj){
obj.style.backgroundColor == "pink" ? obj.style.backgroundColor = "#e5e5e5" :
obj.style.backgroundColor = "pink";
[code]....
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Jan 8, 2011
I have created an object called list. the object has a method called load and a method called setSelected (it has more, but they arn't impotant here).
The load method prints out table rows like this:
str+="<tr>"+data+"</tr>";
and in the end, inserting str as the body of a table.
what I want to do now, is have an onclick event for each of these table rows, that calls the setSelected method of the current object. so for example, if I'd write this on my page:
mylist = new list(args...);
mylist.load();
<div id='associated-div'></div>
that if someone clicks a row in the table that is created in the div, the setSelected method of my list oject will be called.
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Dec 3, 2009
What I'm trying to do here is even possible.
I've tried numerous variations of the alert line with evals, brackets and jQuery syntax but always seem to get the error:
XML filter is applied to non-XML value ({one:["1", "2", "3"], two:["a", "b", "c"]})
Which makes me think I'm either attempting something stupid or only missing my target slightly.
The code will be running within a jQuery project up if that helps in any way.
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Apr 22, 2010
I am having trouble changing the value of a flash object using JS in IE. The flash code is below
<object id="FlashID" classid="clsid27CDB6E-AE6D-11cf-96B8-444553540000" width="721" height="423">
<param name="movie" id="movie" value="../../flash/world.swf">
<param name="quality" value="high">
[code]...
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Apr 2, 2009
This has really got me stuck. Below is a distillation of my problem:
This is my function:
function Clear(form) {
???.checked = false;
}
<form name="myform">
[Code]....
How do I execute the function to clear the checkbox the moment it is clicked? How do I reference that specific checkbox, when there are multiple checkboxes with the same "name"?
The rules (the above is a simplified version of my actual problem. There is much more to my script, which means other possible solutions cannot be considered):
1. I am aware of onclick="this.checked=false", but I cannot use it.
2. The ID for the checkbox is dynamically generated, whereas the entire onclick command must be the same for all checkboxes.
3. All checkboxes must have the same name, and the name must have square brackets.
4. "this.form" must be in the onClick, as it is used by the rest of the function.
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Jul 23, 2005
My HTML pages have a <SCRIPT SRC=http://remote/script> at the top'ish
of each page. Sometimes the remote host (probably due to heavy load or
flaky network connectivity) doesn't respond for a long time. This
causes the whole page to appear hanging without anything loading.
Is there some trick I can use with settimeout() so that if the remote
script cannot be loaded after, say, 30 seconds, then I can tell the
page/browser to cancel loading that script?
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Jul 28, 2009
What can I do to avoid animation repetition? because when I write an function and put to be executed onclick, if the user click more than one time it start to repeat...
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Aug 26, 2009
How can i get around of avaoiding a promplt when trying to close a window?
[code]
function NoConfirm(){
window.opener = top;
window.close ();
}
[Code]...
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Jan 19, 2010
I am building a website with a very plain main page. It displays some text but it also displays a random background avoiding scrollbars, etc. I've managed to do the random image thing, but I also want it to scale the random image. Also I have tried this same thing and I got it working but in a different file, I just don't know how to combine this two solutions. I attach the code of both files:
[Code]...
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Jan 7, 2011
I have a spam problem with my online form in [url]
I keep receiving spam and what puzzles me is that the spam script does not need to fill the required fields to send the form.
I tried to add a math puzzle by inserting:
and
However, the hidden field still shows on the browser (it doesn't show the value but it shows an empty square) and I can't get the form check to compare the values of "Filtro" and "Solucionfiltro".
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Apr 29, 2010
I have following code, that i am sure can be done in 1 single function, which will ease extending it in future.
Basically when a link is clicked, i wante the upload form to apear....and any other upload forms to disapear.
How can i put those 3 functions in 1?
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Oct 6, 2004
I'm trying to get a value from a link that a user click on in a pop up window and send it back to the parent window. It's working fine in mozilla and some IE but i'm having problem in IE 5 and some IE 6.
<a href="javascript:opener.document.getElementById('<?php echo $_REQUEST[partid];?>_partremoved').value = '<?php echo $partnum;?>'
opener.document.getElementById('<?php echo $_REQUEST[partid];?>_partinstalled').value = '<?php echo $partnum;?>'window.close();">
<?php echo $partnum;?></a>
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Sep 3, 2009
Has anyone now how to simplify the following expression by avoiding
using attr("id")
alert($("#"+$(obj).attr("id")+"~p:last").attr("id"));
I need this because not every image could have an id.
<script language="javascript" type="text/javascript">
function ExpandCollapseOnLeftPanel(obj) {
if ($(obj).attr("src") == "/Content/Images/arrow_bot.gif") { //
[Code]...
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Jul 23, 2005
given that I have a js file included which is written programatically and I
can't change it. I would like to know how to do the following using
something other than the deprecated eval().
whats in the js file
var numArrays=something;
var data0 = new Array();
data0.name="name";
data0.data="some data";
var data1 = new Array();
data1.name="another name";
data1.data="some more data";
etc ....
function getData(arrayName) {
for ( var i=0;i<numArrays:i++) {
var el=eval('data'+i);
if (arrayName = = el.name) doSomething(el.data);
}}
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Jul 23, 2005
var fns = ['orde', 'no', 'kml', 'snf', 'td', 'ty', 'tn', ...up to 21
elms...];
var snv = new Array();
var vals = new Array();
for (i = 0; i < N; i++) {
for (j = 0; j < fns.length; j++)
vals[j] = some value;
snv[i] = new makeData(vals);
}
function makeData(vals) {
for (k = 0; k < vals.length; k++)
//the following line doesn't work
eval("this."+fns[k]+"="+vals[k]);
//neither this one
this.eval(fns[k]) = vals[k]);
}
how can i make it without writing it the long way:
this.orde = vals[0];
this.no = vals[1];
this.kml = vals[2];
and so on?
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Nov 16, 2006
how comes the following doesnt work
fieldNotes2=eval("Message.notes["+id2+"]");
i believe it's because of the [] but i need to keep them!
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Jan 28, 2004
I've made a funny program using eval()...it will let the person(on the page) to write javascript and have it compile(if thats the right word for it)! its quite cool, i dont know how handy it might be, but here it is none the less...
code:
<html>
<head>
<title>test</title>
<script language="JavaScript">
function submitCode(){
var the_code = window.document.form_1.textarea_1.value;
var run_the_code=eval(the_code);
}
</script>
</head>
<body>
<center>
<h1>write some code!</h1>
<form name="form_1">
<textarea name="textarea_1" rows=10 cols=40>
</textarea>
</form>
<form onSubmit="return false;">
<input type="submit" value="submit your code" onClick="submitCode();">
</form>
</center>
</body>
</html>
very simple stuff, but for those of you who are unfamilir with eval, its pretty cool, huh?
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Oct 29, 2009
whenever I run the below code I am unable to hide my <DIV>. I have posted a previous post regarding hiding DIVs however as this is slightly different I thought I would create a new topic here to allow for easier searching for other users.
The below code works if the DIV is outside of the form however if I enter it within the form nothing happens.
<form name="formcreate" method="post" action="">
<table width="80%" border="0" cellspacing="2" cellpadding="2">
<div id="div1">
<tr>
[Code].....
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Aug 28, 2007
Is there a way in the Javascript to reference the dom of another page that is online. An example would be if www.cnet.com has an element with an id = money can I reference that page with an object that and get a value from the money element and display it on my page. I know this sounds confusing but really i just want to be able to save a xhtml page that is not on my website. Create a input filestream from that page and use data from the filestream to make data on my own page.
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Sep 22, 2010
In my application i use window.showmodaldialog() to pop up a window. When i run it in IE pop up blocker wont blocks the window... But when run it in FireFox pop up blocker will blocks the pop up window.. is there any way to open a window with out blocking(avoiding ) by the pop up blocker?
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Aug 23, 2005
I'm having some weird problem with evaluating the continue statement.
Within a for loop I'm trying to evaluate a string (generated somewhere
earlier) which basically has the continue statement in it. IE6 seems to
have major problems with that as it generates an error "Can't have
'continue' outside of loop". Does anyone know why and/or have a
workaround? I haven't tried any other browser since this one is the
only one available (company policy).
I have included some code to reproduce this behaviour. The first and
second if statements of the testeval function behave as expected. The
third one however produces the mentionned error. Code:
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