Develop Reference

Call a javascript function throught URL

I have a website with tabs, where each tab is in fact in the same table with an atribute that show it or not. Then a javascript function would change the attribute when you press on the tab.
The function is something like this:
function showHide(ID) {
switch (ID) {
case 'main':
document.getElementById('main').style.display = 'block';
document.getElementById('abstracts').style.display = 'none';
break;
case 'abstracts':
document.getElementById('main').style.display = 'none';
document.getElementById('abstracts').style.display = 'block';
break;
}
return true;
}
Then, the title of the tab is something like
Main
and the tab is
<tr id="main"> ... </tr>
The thing is that I would like to be able to have a URL for a tab, for example http://mypage.com#main or something like that, so when I enter to that URL, the tab main is focussed.
Is that possible?

At the bottom of your page or window.onload, read the hash and call your method.
(function(){
var hash = window.location.hash.substr(1);
showHide(hash);
}());
and if you want the url to change, you probably want to remove the return false.

You can use hashchange event listener here.
eg :window.addEventListener("hashchange", doThisWhenTheHashChanges, false);

ajax image viewer , back button and history - missing html and css

I am playing with jquery and js, trying to build an ajax overlay image viewer for a PHP website. With this code included at the bottom of the 'gallery page', the viewer opens and i can navigate with next and previous links inside the viewer. But the back button and the history is hard to understand. The browser often shows only the response of the ajax call, without the underlying page and css files, after some clicks back.
Perhaps somebody knows what is generally happening in such a case? I would like to understand why back sometimes results in a broken page, i.e. only the ajax response.
<script type="text/javascript">
$(document).ready(function() {
function loadOverlay(href) {
$.ajax({
url: href,
})
.done(function( data ) {
var theoverlay = $('#flvr_overlay');
theoverlay.html( data );
var zoompic = $('#zoompic');
zoompic.load(function() {
var nih = zoompic.prop('naturalHeight');
var photobox = $('#photobox');
if($(window).width() >= 750){
photobox.css('height',nih);
}
theoverlay.show();
$('body').css('overflow-y','hidden');
$(window).resize(function () {
var viewportWidth = $(window).width();
if (viewportWidth < 750) {
photobox.css('height','auto');
zoompic.removeClass('translatecenter');
}else{
photobox.css('height',nih);
zoompic.addClass('translatecenter');
}
});
});
});
return false;
}
var inithref = window.location.href;
$(window).on('popstate', function (e) {
if (e.originalEvent.state !== null) {
//load next/previous
loadOverlay(location.href);
} else {
//close overlay
$('#flvr_overlay').hide().empty();
$('body').css('overflow-y','scroll');
history.replaceState(null, inithref, inithref);
}
});
$(document).on('click', '.overlay', function () {
var href = $(this).attr('href');
history.pushState({}, href, href);
loadOverlay(href);
return false;
});
});
</script>
edit
clicking forward works:
/photos (normal page)
/photos/123 (overlay with '/photos' below)
/locations/x (normal page)
/photos/567 (overlay with '/locations/x' below)
clicking back gives me the broken view at point 2.

Do you need to prevent the default behaviour in your popstate to prevent the browser from actually navigating back to the previous page?

you have to manage it by own code.
You have a few options.
Use localstorage to remember the last query
Use cookies (but don't)
Use the hash as you tried with document.location.hash = "last search" to update the url. You would look at the hash again and if it is set then do another ajax to populate the data. If you had done localstorage then you could just cache the last ajax request.
I would go with the localstorage and the hash solution because that's what some websites do. You can also copy and paste a URL and it will just load the same query. This is pretty nice and I would say very accessible
Changing to document.location.hash = "latest search" didn't change anything.t.
This goes into the rest of the jQuery code:
// Replace the search result table on load.
if (('localStorage' in window) && window['localStorage'] !== null) {
if ('myTable' in localStorage && window.location.hash) {
$("#myTable").html(localStorage.getItem('myTable'));
}
}
// Save the search result table when leaving the page.
$(window).unload(function () {
if (('localStorage' in window) && window['localStorage'] !== null) {
var form = $("#myTable").html();
localStorage.setItem('myTable', form);
}
});

Another solution is that use INPUT fields to preserved while using back button. So, I do like that :
My page contains an input hidden like that :
Once ajax content is dynamicaly loaded, I backup content into my hidden field before displaying it:
function loadAlaxContent()
{
var xmlRequest = $.ajax({
//prepare ajax request
// ...
}).done( function(htmlData) {
// save content
$('#bfCache').val( $('#bfCache').val() + htmlData);
// display it
displayAjaxContent(htmlData);
});
}
And last thing to do is to test the hidden field value at page loading. If it contains something, that because the back button has been used, so, we just have to display it.
jQuery(document).ready(function($) {
htmlData = $('#bfCache').val();
if(htmlData)
displayAjaxContent( htmlData );
});

JavaScript login/signup callback functions

I'm working on a Magento extension, all based on JavaScript and I need to integrate a widget from WordPress.
I have the event.js from view /widgets:
/* links events */
var eventLinks = function() {
var $loginBtn = my.html.find('.att-login'),
$signupBtn = my.html.find('.att-signup');
/* login btn event */
$loginBtn.on('click', function() {
BYND.widgets.log('[INFO]', '[LANDING PAGE] - Login button clicked');
BYND.Auth.Login(function() {
window.location.href = 'collections.html?page=my_collections';
});
return false;
});
/* signup btn event */
$signupBtn.on('click', function() {
BYND.widgets.log('[INFO]', '[LANDING PAGE] - Signup button clicked');
BYND.Auth.Signup(function() {
window.location.href = 'collections.html?page=my_collections';
});
return false;
});
},
And I need to make some callbacks for login/signup functions so my login box (already made in WP) pops up.
Any help?

I suppose function you are looking for (callback for signup) is here:
BYND.Auth.Signup(function() {
// replace that line with your code
window.location.href = 'collections.html?page=my_collections';
});
If you would like to show that page as a popup you could use another window, or iframe...

Opening only one instance of url using window.open

I am working on an asp.net web page which has a hyperlink. when ever that hyperlink is clicked, a new browser window is opened using javascript window.open. I want that If user clicks this link multiple times, then only one window is opened and not multiple windows. I just want that window to be highlighted when user clicks that hyperlink multiple times. Do I need to use window.open to detect if the url is opened in any other tab of the browser ? Is there any jQuery plugin built in for this so that I can use it for browser compatibility.
Here is the hyperlink url:
<a onclick="addClick()" href="javascript:void(0)">
New</a>
and here is the code I am using:
function addClick() {
var ID = jQuery("#ID").val();
var PSSWD = jQuery("#PSSWD").val();
var ACCID = jQuery("#ACCID").val();
var PASSWDINT = jQuery("#PASSWDINT").val();
window.open("LoginAPI?ID=" + encodeURIComponent(ID) + "&PSSWD=" + encodeURIComponent(PSSWD) + "&ACCID=" + encodeURIComponent(ACCID) + "&PASSWDINT=" + encodeURIComponent(PASSWDINT) + "", "LoginAPI");
}
Please suggest.

Try
window.open("<url>", "<window name>");
This should always open in the same window. See reference.

HTML:
open window
var wins = {};
function openwindow(){
var url = this.href;
if(typeof wins[url] === 'undefined' || wins[url].closed)
wins[url] = window.open(url);
}

<script>
var windowObjectReference = null; // global variable
function openFFPromotionPopup() {
if(windowObjectReference == null || windowObjectReference.closed)
/* if the pointer to the window object in memory does not exist
or if such pointer exists but the window was closed */
{
windowObjectReference = window.open("http://www.spreadfirefox.com/",
"PromoteFirefoxWindowName", "resizable,scrollbars,status");
/* then create it. The new window will be created and
will be brought on top of any other window. */
}
else
{
windowObjectReference.focus();
/* else the window reference must exist and the window
is not closed; therefore, we can bring it back on top of any other
window with the focus() method. There would be no need to re-create
the window or to reload the referenced resource. */
};
}
</script>
click here
Check the reference https://developer.mozilla.org/en-US/docs/Web/API/window.open

To open only one instance of a popup window in an HTML page, use the windowName parameter of the window.open method.
For example
window.open('http://www.abc.com')
will open a new window each time the user clicks the link containing the window.open code.
In constrast,
window.open('http://www.abc.com','abc')
will open only one instance of the window, no matter how many times users click the link.
you can also use focus function as used below
<script language="javascript" type="text/javascript">
<!--
function popitup(url) {
newwindow=window.open(url,'name','height=200,width=150');
if (window.focus) {newwindow.focus()}
if (!newwindow.closed) {newwindow.focus()}
return false;
}
// -->
</script>
Edit 1
<a onclick="return addClick()" href="javascript:void(0)">New</a>
and here is the code I am using:
function addClick() {
var ID = jQuery("#ID").val();
var PSSWD = jQuery("#PSSWD").val();
var ACCID = jQuery("#ACCID").val();
var PASSWDINT = jQuery("#PASSWDINT").val();
window.open("LoginAPI?ID=" + encodeURIComponent(ID) + "&PSSWD=" + encodeURIComponent(PSSWD) + "&ACCID=" + encodeURIComponent(ACCID) + "&PASSWDINT=" + encodeURIComponent(PASSWDINT) + "", "LoginAPI");
return false;
}

Showing warning with timeout when opening external links

I want that when a user clicks on any external link (identified by either particular id or class) on my site then he should get a popup with a counter of 10 seconds, after 10 seconds the popup should close and the user should be able to access the external URL. How can this be done? I'm able to show a warning like below but I don't know how to add timeout to it, also this is a confirm box, not a popup where I can add some div and more stuff for user to see until the counter stops.
$(document).ready(function(){
var root = new RegExp(location.host);
$('a').each(function(){
if(root.test($(this).attr('href'))){
$(this).addClass('local');
}
else{
// a link that does not contain the current host
var url = $(this).attr('href');
if(url.length > 1)
{
$(this).addClass('external');
}
}
});
$('a.external').live('click', function(e){
e.preventDefault();
var answer = confirm("You are about to leave the website and view the content of an external website. We cannot be held responsible for the content of external websites.");
if (answer){
window.location = $(this).attr('href');
}
});
});
PS: Is there any free plugin for this?

I've put together a little demo to help you out. First thing to be aware of is your going to need to make use of the setTimeout function in JavaScript. Secondly, the confirmation boxes and alert windows will not give you the flexibility you need. So here's my HTML first I show a simple link and then created a popup div that will be hidden from the users view.
<a href='http://www.google.com'>Google</a>
<div id='popUp' style='display:none; border:1px solid black;'>
<span>You will be redirected in</span>
<span class='counter'>10</span>
<span>Seconds</span>
<button class='cancel'>Cancel</button>
</div>
Next I created an object that controls how the popup is displayed, and related events are handled within your popup. This mostly is done to keep my popup code in one place and all events centrally located within the object.
$('a').live('click', function(e){
e.preventDefault();
popUp.start(this);
});
$('.cancel').click(function()
{
popUp.cancel();
});
var popUp = (function()
{
var count = 10; //number of seconds to pause
var cancelled = false;
var start = function(caller)
{
$('#popUp').show();
timer(caller);
};
var timer = function(caller)
{
if(cancelled != true)
{
if(count == 0)
{
finished(caller);
}
else
{
count--;
$('.counter').html(count);
setTimeout(function()
{
timer(caller);
}, 1000);
}
}
};
var cancel = function()
{
cancelled = true;
$('#popUp').hide();
}
var finished = function(caller)
{
alert('Open window to ' + caller.href);
};
return {
start : start,
cancel: cancel
};
}());
If you run, you will see the popup is displayed and the countdown is properly counting down. There's still some tweaks of course that it needs, but you should be able to see the overall idea of whats being accomplished. Hope it helps!
JS Fiddle Sample: http://jsfiddle.net/u39cV/

You cannot using a confirm native dialog box as this kind of dialog, as alert(), is blocking all script execution. You have to use a cutomized dialog box non-blocking.
You can use for example: jquery UI dialog
Even this has modal option, this is not UI blocking.

Consdier using the javascript setTimeout function to execute an action after a given delay
if (answer){
setTimeOut(function(){
//action executed after the delay
window.location = $(this).attr('href');
}, 10000); //delay in ms
}