Iterating Through List Of Inputs Is Too Slow?
Feb 15, 2010
The web page I'm fixing up has a list of radio buttons that can be very long (10,000+). We have to loop through the list to find the one that has been toggled, but this results in IE throwing the error stating that the script is taking "an unusually long time to finish." I've added a break to the loop which should get triggered once the selected input is found, but that doesn't seem to have made a difference. Is there a better way to handle this scenario? My code is as follows:
[Code]...
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Aug 3, 2011
Basically I have a unordered list with LI's and form/inputs within the LI's. Looks kinda like this...
<ul><li>
My LI
<form><input name='input_1'>
<input name='input_2'></form>
</li><li>
My second LI
<form><input name='input_1'>
<input name='input_2'></form>
</li></ul>
What I want to be able to do it loop though each of the li's, grab the values from the form inputs and serialize themas JSON.
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Nov 1, 2007
I'm trying to iterate through nodes in a Selection Range, but I'm having a bit of trouble determining why all nodes in the range aren't being hit. It seems like deeply nested nodes aren't being hit for some reason.
Here's the code I'm using.
var n = startNode;
while (n) {
this.visited.push('[' + n.nodeName + ']');
if (n == endNode) {
break;
}
if (n != startNode && n.hasChildNodes()) {
n = n.firstChild;
} else {
while (!n.nextSibling) {
n = n.parentNode;
}
n = n.nextSibling;
}
}
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Jul 21, 2009
How do I iterate through an XML and get each tag name, without knowing in advance what these tag names are?
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Oct 20, 2009
I have this code:
$("form.uplform").live('submit', function(){
if($(this).attr('validate')=='true'){
$("#testform>input").each(function(){
[code]....
What I'm trying to achieve is alert all the name attributes of allinput boxes belonging to form.uploform but this does not seem tohappen. although i did get past if validate==true thing..
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Oct 15, 2007
I have a page that dynamically draws checkboxes with a combo. I'm
then attempting to use the following code to iterate through each combo
box and change the value to match the text box. Code:
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Mar 4, 2010
I'm creating a simple gallery as a way to dip my toes into jQuery. I have thumbnails, each of which link to an image file, and when the user clicks on them the main image in the center is swapped. This works fine.
I'm now coding the "previous" and "next" buttons. They will work the same way -- they just link to a photo, and when clicked the main photo is swapped. However, the link needs to update whenever a new image is displayed.
The way I am doing this now is to: 1) Go through the list of thumbnails and work out which thumbnail in the list is the one that points to the current main image, 2) find the previous and next thumbnails (if they exist), 3) update the links and show the previous and next buttons as required.
[Code]...
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Jan 4, 2011
I have a question about iterating through an HTML table with jQuery.
I have a table that I populate with AJAX and only stores the data. However I would like to now stylize each cell according to the data that is inside and its position in the table.
I have come up with something like this to iterate through each row and cell
Code:
I am wondering now, how do I reference the very first column once I am inside the inner .each() loop? The very first column of this row contains information on how to stylize this cell.
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Dec 14, 2011
I have a php file with an almost-standard html form. The not-so-standard part is that the name-attributes of the form elements are dynamically generated as such:
<? for($i=0; $i<5; $i++) { ?>
<input type="text" name="field_<? echo $i; ?>" />
<? } ?>
Now I want to do some javascript validation on the fields, but I'm having a bit of trouble accessing the values of the fields. My current code is as follows:
[Code]...
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Jul 24, 2010
I have created a JSON object through a PHP script. The code is as follows:
$result1 = array();
$i = 0;
hile($row = $result->fetch_assoc()) // $result contains result from a database query
[code]....
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May 22, 2010
I have a for loop where I am applying a fadeIn for each element in a div group. As I'm for looping through each element, the loop doesn't wait till the fadeIn applies completely on one element .. before going to the next iteration.
So what I'd want as a step by step fading in is now happening all at once.
Here's my code.
So tmp_id is the variable that stores the id of each element in that group.
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May 7, 2009
I'm just starting to pick up on jQuery and I'm a bit stuck.What I am trying to do is take the following XML response and obtain the src attribute from each image. I then want to append that value to an array.
XML
Code XML:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
[code]....
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Aug 30, 2009
I have a form of data I am working on where I may have *nearly* the same thing appear with a checkbox appear multiple times.
For example:
<input type="checkbox" name="blah" value="widget1||123456">
<input type="checkbox" name="blah" value="widget2||123456">
<input type="checkbox" name="blah" value="widget3||123456">
<input type="checkbox" name="blah" value="widget4||123456">
<input type="checkbox" name="blah" value="widget5||123456">
So, if checkbox #1 (widget1) is checked, it will either disable all other ones containing the sku 123456 OR replace the others in the form having sku 123456 with an image of a sort. Is there a way to select this without iterating through every checkbox in the form and looking at it's value?
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Sep 17, 2007
We're developing an ASP.NET / C# intranet application. All users use
Internet Explorer 6.0 and JavaScript is always enabled.
In a HTML table, we use an onclick event on each tablerow and in that
onclick event (javascript) we save some values in hidden fields.
Most of the time, this works very fast, but it also happens a lot of
times that the internet browser respons very slow or gets stuck. We
really don't know what causes this, because in the javascript we do only
simple things such as setting values in hidden fields.
Is there anyone who recognizes this problem and knows some possible
solutions?
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Nov 8, 2007
Images are cached by the browser depending on the headers sent by
the server. If the server does not send sufficient information
for the browser to decide the image is cacheable, the browser
will check if the image has been updated every time you change the
src of an image (in some user settings). To overcome this you
must send suitable headers.
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Jul 20, 2005
Has anyone else had this issue? Basically, the preload of images for a
rollover effect for the navigation is really really slow when using IE
6.0 but when i view the site using Netscape, it's fast like it should
be(no lag!)
My problem is that since 96% of users use IE, i need to figure a way
to fix this. Below is the javascript currently being used. The
arguments are passed in before the script is called.
MM_preloadImages(
'<%=assets_path%>/left_nav/manage_view_wthr_on.gif',
'<%=assets_path%>/left_nav/manage_admin_guide_on.gif',
'<%=assets_path%>/left_nav/manage_terms_cond_on.gif',
'<%=assets_path%>/left_nav/manage_reports_on.gif',
'<%=assets_path%>/left_nav/manage_account_info_on.gif',
)
function gn_rollover_preload(){
//preloads middle images for the navigation
if (document.images){
var argLength = gn_rollover_preload.arguments.length;
for (arg=0; arg < argLength; arg++){
eval(arguments[arg] + "_off = new Image()");
eval(arguments[arg] + "_on = new Image()");
eval(arguments[arg] + "_left = new Image()");
eval(arguments[arg] + "_right = new Image()");
eval(arguments[arg] + "_off.src = '" + ASSET_PATH_HEADER +
"button_nav_"+ arguments[arg] + "_off.gif'");
eval(arguments[arg] + "_on.src = '" + ASSET_PATH_HEADER +
"button_nav_"+ arguments[arg] + "_on.gif'");
eval(arguments[arg] + "_left.src = '" + ASSET_PATH_HEADER +
"button_nav_"+ arguments[arg] + "_left.gif'");
eval(arguments[arg] + "_right.src = '" + ASSET_PATH_HEADER +
"button_nav_"+ arguments[arg] + "_right.gif'");
}
// Now Preload all "corner" images for faster swapping
corner1 = new Image();
corner2 = new Image();
corner2_both = new Image();
corner3 = new Image();
corner3_both = new Image();
corner4 = new Image();
corner4_both = new Image();
corner5 = new Image();
corner1.src = eval("'" + ASSET_PATH_HEADER +
"button_nav_corner_1.gif'");
corner2.src = eval("'" + ASSET_PATH_HEADER +
"button_nav_corner_2.gif'");
corner2_both.src = eval("'" + ASSET_PATH_HEADER +
"button_nav_corner2_both.gif'");
corner3.src = eval("'" + ASSET_PATH_HEADER +
"button_nav_corner_1.gif'");
corner3_both.src = eval("'" + ASSET_PATH_HEADER +
"button_nav_corner3_both.gif'");
corner4.src = eval("'" + ASSET_PATH_HEADER +
"button_nav_corner_1.gif'");
corner4_both.src = eval("'" + ASSET_PATH_HEADER +
"button_nav_corner4_both.gif'");
corner5.src = eval("'" + ASSET_PATH_HEADER +
"button_nav_corner_2.gif'");
}
}
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Apr 21, 2005
Code:
As far as I can tell, there seems to be a distinct lag time in IE before the switch from the 'off' to the 'on' image, and vice versa, which doesn't seem to exist in Mozilla.
Is this something that can be fixed by tweaking the script?
The script, btw, is pretty ancient, so I expect it may contain some outdated stuff. I found it years ago when looking for a script that would allow me to easily customize the number of target images changed by a single onmouseover/onmouseout action. Since I don't actually know javascript, I tend to stick with the ones I've learned to at least do basic customization of.
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Apr 6, 2010
I've got the following site that loads great in FF and Chrome (no surprise), but is terribly slow in IE7. It's even quick in IE6, but not 7. Here's the site code...
Now I'm using JQuery in a couple places, but it's by no means nothing crazy. The page is fairly simple.
I thought of preloading the main content images, but even after they are loaded in the cycle, the loading time is still slow.
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Aug 19, 2010
I have a div that is invisible all the time, and when one popup is activated, that div will fade in to darken the website background, like this:
And I'm using the following code when the darkness appears:
PHP Code:
function raiseOpacity(obj,counter) {
obj.style.opacity = counter/100;
counter +=2; //Raise 2% each time
if(counter < 100) setTimeout(function()
{raiseOpacity(obj,counter)},10);
//Repeat the incrementation again}raiseOpacity (document.getelementbyid('example'),0);
//Just an example of how the function is called.
But it is too slow, the browser hangs alot while doing this. Is there a faster way to do this fade in stuff? I've seen a lot of websites that do this and the browsers is fast, but I couldn't extract the code from them.
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May 6, 2004
i've encountered a problem with the way the drag events are handled in this file, but it had an easy fix. I have a slider (a draggable div) and dragging it involves a lot of processing power. The problem arises if the mouse pointer seperates itself somehow from the element being dragged (by, say, a spike in CPU usage or something). the x_drag library file registers a mouseup listener on the object which is being dragged, but that doesn't do any good if the mouse pointer tracks so much as one pixel off the dragged element.
I've encountered this in almost every situation where i have draggable elements. Thankfully, it's a real easy problem to solve: if the mouseup events are registered on the document itself, there's nothing to worry about, because any old mouseup will end the drag.
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Apr 1, 2006
I put a javascript for a preload in it and it hasnt helped the front page. Right now the header is swish and we took that out and it still took over 2 minutes to download on DSL. I do have the JS anthology book but the script in there didn't work for us. Come to think of it I have almost all of the sitepoint books. Does anyone have any suggestions.
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Sep 10, 2011
I have installed Lightbox 2 Lightbox 2 for a client's site redo, and we are concerned about the opening speed of Lightbox for those on a slower Internet connection. Lightbox is only for those visitors who want to see images in a larger view. Is this something we should be concerned about? Are their other choices that would be better?
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Jul 23, 2005
I try a few grid table and they are nice BUT loading thousand rows of data are slow.
May be there is any simpler yet attractive table style format I can use just to beautify the current <table> ?
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Jul 23, 2005
Recently submitting forms (specifically forms which have javascript attached
to them with the submit function) has become very slow. The browser appears
to sit there for seveal seconds doing nothing (the page also becomes non
responsive) and then suddely loads quickly. This happens on all of my
computers... What's happened to javascript? Is there some setting that's
been turned on that I'm missing?
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Mar 19, 2007
I am attempting to modify the style of an element (its width) as the
window is being resized, in firefox.
Long story short, I've tried to use CSS but one particular part of the
layout just won't do what I need.
The javascript solution assigns a function to window.onresize that
sets the inline style, it works with one problem -- the handler only
gets called after the resizing stops, and so there is noticeable lag
before it redraws.
It is not the function that is taking a long time to execute, its
appears to be firefox's handling. It doesn't call it as frequently as
I expected.
Is there another javascript method to accomplish this without the
extra lag?
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Jun 12, 2010
I have a problem with the jQuery.ajax() function combined with a keyup event (i think key events in general). I'm binding an keyup event to an input field so that on every change the current input is send via the ajax function and receives new data from the server, displaying it in a selectbox.
when I'm typing very fast it seems that the ajax function is too slow for this and shows up old result elements. After triggering the event another time, e.g. via UP,DOWN,.. it receives and displays the correct data.
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