XMLHttpRequest - Execute A Functions When The Body Loads
Mar 1, 2011
What I'm trying to do is execute a functions when the body loads. This function will make an XMLHttpRequest and then recals itself every 2 minutes for example. The good thing is it really recals itself every 2 minutes, but it doesn't make any changes. The XMLHttpRequest is a request to an XML file on the internet which changes often, and I want the data of it. When my function recals itself, it displays the data of the first call and never changes after that. So I guess it never makes a new XMLHttpRequest, or it doesn't update the returned data.
I have long html/CSS (no CMS or php, etc.) web pages. Some people run away when they see too much content on a page. So I hide the large lower section of the pages and have the user click anchor text to execute simple JS code to change the display from 'none' to 'block' or back to re-hide.
Code:
(BTW my research indicates that search engines do not know the difference between display='none' and normal content, or I would not be hiding content in the first place.)
Within this hidden content, I have anchor text to provide name handles
Code:
So users can click a link and go directly to that section. Within that link I include
Code:
So that works fine within a particular page. But when I want to link to an anchor on another page which is within this hidden content, the browser cannot display the anchor text because it is still hidden.
Is there a way to execute the JS code to change the DOM, changing the display to 'block' on the content of the new page?
I do not see how, because the new page isn't loaded yet, there is no DOM within the browser yet, so how can it be manipulated?
Of course if I was using php I could generate the code with the property set as desired. But for straight up html/CSS/JS pages is this possible?
I get the feeling I am missing something simple here, either a simple solution or the simple fact that this is just an inherent limitation of html.
Can I intercept the loading of an image BEFORE it loads? We're looking at using an img tag for inserting stats on our server. Here's what I'm considering.
1) Collect certain information server side, write an img to the document like so (note the URL vars): <img id="statsImg" src="stats.cfm?somevar=someval" width="1" height="1" />
2) Using JS, intercept the load of this image BEFORE it takes place, and add things to the URL vars. This way, if JS is not present, you get the default stuff, but if JS is present, you get extra stuff.
I am wanting to be able to swap out any of them to make them 'primary' this works for the first click, but after the first click it makes every div id and input name the same as the first that was clicked.It's also not working AT all if i click on the bottom link first, then a link above it.Top-down works, bottom-up doesn't.
I am using dojo to validate my signup form. If I putting execute="checkPw(arguments[0]); before "submitI fValid(this.isValid());"> , the check password is working but i cant submit the form or vice versa.
I have a page at URL... where I have styling on the radio and check boxes.I'm working on another project for class now where I want onclick or onchange functions in the radio buttons. When the radio buttons have the class="styled" on them, the function will not execute. When that's removed, they do.This is what one of my radio buttons looks like:<input type="radio" name="puppy" value="1" class="styled" onchange=" puppycheck()"> Black and White Puppy.If the style tag is removed it works perfectly.
My site has a template design using PHP includes. I have a chatbox include on the home page, which itself is an include of the master page. The chatbox include contains all of the javascript functions for the chat. The problem is that I need to have a function automatically execute to start the chat, but I don't know how to do this without using 'onLoad' in a body tag. As far as I know, body tags should not be used in an include.How else can I have the 'startChat()' function load automatically?
I have a web page that has a short flash show on it, then it redirects to the main site index page, using a setTimout in body onload. That was all working fine. Now I need to add an OS detection function to redirect iphone and ipad users immediately (bypassing the flash pape). So, I have 2 functions that need to be in the body onload. I figured the logical thing to do would be to write another function that calls the first 2, then put that one in the onload. But now nothing is working. I have played with in for an hour with no luck.
Just as a note: Original, before I had to add the OS detection, there was just the delayer function, and it was called thusly:
I have a simple problem and cant seem to figure it out. I have a function in the body.load function that is supposed to highlight rows in my table when i mouse over them. When u refresh the page, the function works properly. When I dynamically add new rows to the table using ajax, I get no response.
I'm trying to make my body content scroll at the same time as an iframe located within the body. This has to do with the age old problem of mouse focus on iframes. When my mouse reaches the iframe and it takes over focus, I would like the body to keep scrolling until the iframe is right at the top of the screen. After that I want to relinquish focus to the iframe. I don't mind if the iframe starts scrolling as soon as the mouse reaches it, so long as the main body keeps scrolling for a while.
It seems like when I load javascript code into a page, that each item I add, such as an accordian vertical navbar, image slider, etc, that each time I add one, the page loads a second or so slower with each one added. I would like some of these features, but is this just a part of life, or are there tricks to avoid the slower load time? It is not major time but after the 2 items I mentioned, it added on about 2 seconds.
I read that $(document).ready(function() might slow me down but I do not see that statement in any of my .js files.
It's possible to style document.body not to start at 0,0 for example: body {width: 1000px; margin-left: auto; margin-right: auto;} This means that X/Y of the body is not 0,0 but how can I find out what the position is using javascript? document.body.offsetLeft; is 0 and offsetParent is null yet if I position something absolutely at 0,0 it goes to 0,0 of the window, not the body!
I have written a number of functions designed to return frequency data on 1000 randomly chosen numbers using different math functions for the rounding. I would like to include all of these functions within the wrapper of another function so that only one call is needed to get returns from all of the 'inner' functions. However, while each of the functions works in isolation, the moment I wrap them in another function they stop working. :confused:
The following code is one of the functions 'frequencyWrapperOne' that has been wrapped in the function 'testWrapper'. A call to testWrapper does nothing.
function testWrapper() { function frequencyWrapperOne() {
Yesterday I started rewriting the xmlhttprequest functions to an oo equivalent, but as it turns out, I don't get it right:
Code:
function Request() { this.req=init(); this.req.onreadystatechange = this.processedRequest; //addEventHandler/attachEvent alternative //doesn't work either
function init() { try { if(window.XMLHttpRequest) return new XMLHttpRequest(); else return new ActiveXObject("Microsoft.XMLHTTP"); } catch(e) { alert(e); } } }
var x=new Request(); x.send(url); //the processing function //the eventtrigger should activate the callback function //when the xml has been returned
It seems like the problem is that I don't get to my "this.req" in the processedRequest function. Can anyone see where the problem lies, it has been turning me crazy all weekend already.
1. - I am new to this 2. - Using the following .js file:
Code: function makeObject(){ var x; if (window.ActiveXObject) { x = new ActiveXObject("Microsoft.XMLHTTP"); }else if (window.XMLHttpRequest) { x = new XMLHttpRequest(); } [Code]...
Ive been playing around with xmlHTTPRequest and was wondering if i was programming a part of my code wrong.
what i want to do is have the browser access another part of my site using xmlhttprequest.
however, when i use xmlhttp.open("POST", 'http://xml.mysite.com/test.php') it fails, but if i use xmlhttp.open("POST", 'http://www.mysite.com/test.php') it works. Is access to another url restricted in xmlhttp?
var xmlDoc=document.implementation.createDocument("", "", null);
but in opera xmlDoc.load(...) won't work, so I use:
XMLHttpRequest, and I have all needed code... let's say it works...
So I got serviceRequest.responseXML and is there a way to initialize xmlDoc in my case ? I am asking because I have code that uses xmlDoc.load(...) in FF and all code that's need to futher work with XML written. So this would be comfortable for me to use xmlDoc instead of creating everything from start.
I'm fetching some HTML files with XMLHttpRequest and dumping the ResponseText into block elements; works fine except that single and double quotes are being displayed as question marks (inside of a black diamond in FireFox)
What's going on ? What is the workaround ? I've tried this:
