How can I launch a PARENT jQuery function? - javascript

I'm trying to figure out how to launch a function from an iframe but the following example won't work, any ideas?
<input class='reply' onclick='parent.replytopost()' type='button' value='Reply' />
PARENT PAGE FUNCTION (In the body if that makes a difference):
<script>
function replytopost(){
alert("test");
parent.document.getElementById('mainbar').innerHTML = "TEST";
parent.document.getElementById('post_reply').show();
}
</script>

This might become an issue with security-tightened browsers (such as Safari).
I ran against the same type of problem recently, and I'm now a happy user of window.postMessage.
You will still have to reference it using window.parent but this will prevent the vast majority of issues to happen.

It works for me. Look here
Why do you call parent.* in non-iframe replytopost script?

Will window.opener work for you? I know it works from a parent to a newWindow. I don't know about iframe.
http://www.w3schools.com/jsref/prop_win_opener.asp

Related

Modal popup window's contents not being rewritten in IE after load

I'm trying what should have been a simple operation: when a user clicks a link a modal window pops up that's populated with some appropriate data in a string. Here's the HTML for the window:
<!DOCTYPE HTML>
<html>
<head>
<title>Modal Display Window</title>
</head>
<body>
<div id="modal_display_block">REPLACE THIS</div>
</body>
</html>
And this is the Javascript function that calls and populates the window:
function displayCenterBlock(data) {
DispWin = window.open("modal_window.html", "", 'toolbar=no,status=no,width=300,height=300');
DispWin.onload = function() {
DispWin.document.getElementById('modal_display_block').innerHTML = data;
}
}
This works great in every browser I've tried except Internet Explorer. In IE the innerHTML does not get rewritten by the data. Is there some IE-specific trick or tweak I need to apply to get this working in that browser?
Many thanks in advance!
ON EDIT: I've discovered that if I move the element rewrite line out of the onload function it then works fine in IE but not in other browsers. It appears my options are to use some conditional code to rewrite at once for IE and to wait for page load for all other browsers, or to abandon the rewrite element approach and just use a document.write. I get from forum searches people like to discourage document.write but that's looking pretty appealing right now.
Okay, for better or worse this code achieves the goal and appears to work cross browser, even in IE.
DispWin = window.open("", "Display", 'toolbar=no,status=no,width=300,height=300');
DispWin.document.open();
DispWin.document.write(data);
DispWin.document.close();
DispWin.focus();
I get that document.write can re-write the whole page, and that is sometimes bad, but in this case that is exactly what I want: a single small page displaying only what was passed in the data argument. I can style it inline.

Javascript and target="_top"

I'm working with a legacy frames website that was just moved into an iFrame.
Assuming I have the following function:
<script language = "javascript">
function myFunction(){
<!-- no console.log in IE 7 (my required target browser) -->
alert('sup, yo?');
}
</script>
and the following hyperlink triggering the function:
click me
before the move into an iFrame this worked ok. Once the website was moved into the iframe, clicking the link in IE (not FF or Chrome), I would get the ever-so-helpful error:
Line: 1
Object expected
Once I removed the target="_top" attribute the function would work, so I don't need help solving the problem, but my question is:
What is IE doing with the target attribute when calling a javascript function to invoke this behavior? I don't have other versions of IE installed, is this current behavior in 8+ as well?
Thanks.
It does not make sense to try to understand the behavior. You're using a technique that is not well defined and is not used by developers nowadays.
Instead of href="javascript:myFunction();, just use onclick="myFunction(); return false" or even better, set the handler from JS like the following
<a href="pageForUsersWithoutJs.html" id="my-link" >click me</a>
<script type="text/javascript">
// This is old school, but works for all browsers, you should use a library instead
document.getElementById('my-link').onclick = function() {
// Do your thing
return false; // so the link isn't followed
};
</script>

Simple javascript function not working in IE7

Code works across all major browsers, but firing a simple alert on click is not working.
This is in my header
<script type="text/javascript">
function this_function() {
alert("got here mango!");
}
</script>
This is in the body
<button type="button" onclick="this_function()">click me</button>
If I put the "onclick" into the tag then it works fine and dandy.
Any and all suggestions on how to get this to work in IE would be great. Thanks in advance.
Sorry, by "into the tag" i meant putting onclick="alert()" into the tag.
Try: <button type="button" onclick="javascript:this_function();">click me</button>
It's advised to separate JavaScript and markup. Thus regardless you should assign an ID to the button and attach the onclick handler like this:
document.getElementById("button").onclick = function() {
alert("got here mango!");
};
​
Are you running this sandboxed? If you aren't I would highly suggest trying this all by its self in a single HTML file with no other things going on. It is possible that IE7 is blowing up (quietly) on another script issue that is preventing your "this_function" from loading into the DOM properly.
After you have done this put the in your there is no need for it to be in the head and I have actually seen this cause problems under certain conditions

Accessing Iframe Variable in Parent With Javascript

I'm aware there are incredibly similar questions on Stack Overflow already for this, but I've tried MANY of them, and am just getting nothing. I'm trying to grab a variable from the child iframe to use in the parent window.
In child.html head tag
<script type="text/javascript">
var myVar="1";
</script>
In parent.html
<script type="text/javascript">
function load()
{
var scroll="0";
scroll = window.myIframe.myVar;
if (scroll == "0") DO SOMETHING;
else DO SOMETHING ELSE;
}
</script>
<iframe src="child.html" name="myIframe" onload="load()">
<p>Your browser does not support iframes.</p>
</iframe>
And no matter what I try, I cannot get scroll to grab the myVar variable from the child iframe. This is nearly verbatim of examples on Stack Overflow and other forums that people say work perfectly; any ideas what I'm doing wrong?
Edit: They are on the same domain.
Try to access oad() from inside child when the page loads in iframe.
Add in child:
<body onload="parent.load()">
Also, you can change the code to pass and get the variable as parameter in load(prm) .
I tried your code offline and i get an error "unsafe access" while accessing
window.myFrame
local pages can be tricky, however when i put the same files online they work well, domains and ports match.
still i think its a bit weird using name="..." on the iframe, i would be using ID, but that doesn't seem to bother chrome and i got access to the variable with either onload on parent or child.

Problem using onload javascript

I have used Javascript onlaod like this:
function check()
{
var pic = new Image();
pic.src= "images/first.jpg";
pic.onload = function()
{
alert("Uploaded");
}
}
This is html code where the function is called.
<input type="button" onclick="check()" value="Check" />
It works for both safari and firefox. But with IE, first time it works but when I click on check Button next time it does not work. It also works when cache is cleared.
Can anyone help me what problem might occur here.
Thanks in advance
This should not be a problem in IE8.
IE6 (not sure about 7) is notoriously eager to use cached files, and when taking from the cache the load is not correctly calculated (I recall there being an interesting bug report on this, look for it on MS's site).
It can be solved by adding a [useless] parameter that forces a reload of the cached file:
pic.src= "images/first.jpg?nocache="+Math.random()
perhaps the onload() is too early?
jquery uses a function
$(document).ready(function(){}
that is executed when the page has finished loading.
Perhaps you need some similar function.

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