Develop Reference

AJAX based search returning page information

I found the source of the error but do not know how to fix it. I'm using codeigniter and I'm trying to make a textbox with search results showing under it to help the user find what they are looking for. Think similar to google's search. When I make the AJAX call, it's returning everything on the webpage as well as the search results.
Example of issue: https://gyazo.com/244ae8f3835233a2690512cebd65876d
That textbox within the div should not be there as well as the white space. Using inspect element I realized the white spaces are my links to my CSS and JS pages. Then there's the textbox which is from my view.
I believe the issue lies within my JS.
//Gets the browser specific XmlHttpRequest Object
function getXmlHttpRequestObject() {
if (window.XMLHttpRequest) {
return new XMLHttpRequest();
} else if (window.ActiveXObject) {
return new ActiveXObject("Microsoft.XMLHTTP");
} else {
alert("Your Browser Sucks!\nIt's about time to upgrade don't you think?");
}
}
//Our XmlHttpRequest object to get the auto suggest
var searchReq = getXmlHttpRequestObject();
//Called from keyup on the search textbox.
//Starts the AJAX request.
function searchSuggest() {
if (searchReq.readyState == 4 || searchReq.readyState == 0) {
var str = encodeURI(document.getElementById('txtSearch').value);
searchReq.open("GET", '?search=' + str, true);
searchReq.onreadystatechange = handleSearchSuggest;
searchReq.send(null);
}
}
//Mouse over function
function suggestOver(div_value) {
div_value.className = 'suggest_link_over';
}
//Mouse out function
function suggestOut(div_value) {
div_value.className = 'suggest_link';
}
//Click function
function setSearch(value) {
document.getElementById('txtSearch').value = value;
document.getElementById('search_suggest').innerHTML = '';
}
//Called when the AJAX response is returned.
function handleSearchSuggest() {
if (searchReq.readyState == 4) {
var ss = document.getElementById('search_suggest');
ss.innerHTML = '';
var str = searchReq.responseText.split("\n");
for (i = 0; i < str.length - 1; i++) {
var suggest = '<div onmouseover="javascript:suggestOver(this);" ';
suggest += 'onmouseout="javascript:suggestOut(this);" ';
suggest += 'onclick="javascript:setSearch(this.innerHTML);" ';
suggest += 'class="suggest_link">' + str[i] + '</div>';
ss.innerHTML += suggest;
}
}
}
More specifically the getXmlHttpRequestObject function. it is returning the entire page including my header and footer. I don't believe any more info is needed but if anyone feels that way, I'll supply the view and controller.
https://gyazo.com/d0c43326191a4b09cc4b1d85d67a1bf6
This image shows the console and how the response and response text are the entire page instead of just the results.

Your call to the view method is loading the header view, the suggest view and the footer view while your suggest model is echoing the data that you're after.
You could just remove the line $this->view("suggest"); and your suggestions will be echoed.
This isn't great though. I would pass the titles back to the controller from the model then create a new controller method that outputs the data in a structured way (probably JSON).

Display Image Based on URL Ending (Variable or Attribute) [Pound/Number Sign # ]

I need an image to be displayed based on the ending of a URL.
For example, I need "123.jpg" to be displayed when someone visits:
website.com/view/#123
website.com/view/#123.jpg
website.com/view#123
website.com/view#123.jpg
(whichever is recommended or would actually work)
I'm looking for the end result to be: < img src=123.jpg" >
Thanks in advance. I will sincerely appreciate any assistance.
(By way of background or additional information, I need this for Facebook's sharer.php so that people can share one of hundreds of images on a given webpage (for example, website.com/blog and they happen to love the 123rd image on there), they click the link to share that specific image (123.jpg), and then any of their friends who clicks on the link (website.com/view/#123) will arrive at a themed page with just the image in the middle (123.jpg) and nothing else, and then they can click around the rest of the website. The main benefit is that 123.jpg will be the only image that shows up as a thumbnail on the Facebook Feed or "Wall".)

window.onhashchange = function() {
if (location.hash) {
var url = location.hash.substr(1); // strip the # char
if (url.indexOf('.') == -1) {
url += '.jpg';
}
document.getElementById('myImg').src = url; // show the image; value of the variable 'url'
}
};
window.onhashchange(); // call the event on load

Use something like this.
$(document).ready(function(){
var url = document.URL; //get the url
if ( url.indexOf("#") != -1 ) //check if '#' is present in the url
{
var split_array = url.split("#");
var image_url = split_array[split_array.length - 1];
//display the image
}
});

Try this out,
$(document).ready(function() {
getImageSrc();
$(window).on('hashchange', getImageSrc); // will always lookout for changes in # URL
});
function getImageSrc() {
if(window.location.hash) {
var imgSrc = window.location.hash.substr(1);
if(imgSrc.indexOf('.') == -1 ) {
imgSrc = imgSrc + ".jpg";
}
alert(imgSrc);
}
}

Javascript to redirect from #anchor to a separate page

I have a set of links with #anchors pointing to a single webpage and I would like to smoothly move to a model with a separate webpage for each of those links. I want the old links to keep working using a redirect.
Old link style:
/all_products#A
/all_products#B
/all_products#C
New link style:
/products/A
/products/B
/products/C
I know that the server does not receive the #anchor name in the request but Javascript might.
Is it possible to automatically redirect from /all_products#A to /products/A using Javascript?
JQuery would be fine, it's being used on the site anyway.

I added this new answer to include some best practices for both extracting the hash from the url and doing a redirect.
// Closure-wrapped for security.
(function () {
var anchorMap = {
"A": "/products/A",
"B": "/products/B",
"C": "/products/C"
}
/*
* Best practice for extracting hashes:
* https://stackoverflow.com/a/10076097/151365
*/
var hash = window.location.hash.substring(1);
if (hash) {
/*
* Best practice for javascript redirects:
* https://stackoverflow.com/a/506004/151365
*/
window.location.replace(anchorMap[hash]);
}
})();

Put this as close to the top of your HTML <head> as you can so that it can execute before the rest of the page resources download:
<script>
function checkURL() {
var old_path = '/all_products';
if (window.location.pathname != old_path) {
// Not on an old-style URL
return false;
}
// Some browsers include the hash character in the anchor, strip it out
var product = window.location.hash.replace(/^#(.*)/, '$1');
// Redirect to the new-style URL
var new_path = '/products';
window.location = new_path + '/' + product;
}
checkURL();
</script>
This will check the current page URL and redirect if it matches the old-style path.
This code makes use of the window.location object which contains all the parts of the current URL already split up into component parts.
Making this script more generic is left as an exercise for the implementer.

I hope this can help :)
var urlSplit = document.URL.split("#");
if (urlSplit[1]) {
location.href = "http://www.example.org" + "/" + urlSplit[1];
}
else {
location.href = "http://www.example.org";
}

With jquery, either just replace the href with the correct one:
$('a').each(function() {
this.href = this.href.replace(/all_products#/, 'products/');
});
or capture clicks and redirect:
$('a').click(function() {
window.location = this.href.replace(/all_products#/, 'products/');
return false;
});

this might help:
A
B
C
D
E
<script type="text/javascript">
function redirectMe(a){
var aa=a+"";
window.location=aa.replace(/#/g,"/");
}
</script>

Body onload in Javascript

I had written one JS in asp.net. I had called that from body onload, but the JS doesn't get called where I have put my debugger. What could be possible reasons for this? I'm developing website in dotnetnuke.
The JS I have written is syntactically and logically correct.
<script type="text/javascript">
var displayTime, speed, wait, banner1, banner2, link1, link2, bannerIndex, bannerLocations, bannerURLs;
function initVar() {
debugger;
displayTime = 10; // The amount of time each banner will be displayed in seconds.
speed = 5; // The speed at which the banners is moved (1 - 10, anything above 5 is not recommended).
wait = true;
banner1 = document.getElementById("banner1");
banner2 = document.getElementById("banner2");
//link1 = document.getElementById("link1");
//link2 = document.getElementById("link2");
//banner1 = document.getElementById("banner1");
//banner2 = document.getElementById("banner2");
banner1.style.left = 0;
banner2.style.left = 500;
bannerIndex = 1;
/* Important: In order for this script to work properly, please make sure that the banner graphic and the
URL associated with it have the same index in both, the bannerLocations and bannerURLs arrays.
Duplicate URLs are permitted. */
// Enter the location of the banner graphics in the array below.
//bannerLocations = new Array("internet-lg.gif","jupiterweb.gif","jupitermedia.gif");
bannerLocations = new Array("image00.jpg", "image01.jpg", "image02.jpg", "admin_ban.bmp");
// Enter the URL's to which the banners will link to in the array below.
bannerURLs = new Array("http://www.internet.com","http://www.jupiterweb.com","http://www.jupitermedia.com");
}
function moveBanner() {
//debugger;
if(!wait){
banner1.style.left = parseInt(banner1.style.left) - (speed * 5);
banner2.style.left = parseInt(banner2.style.left) - (speed * 5);
if(parseInt(banner1.style.left) <= -500){
banner1.style.left = 500;
bannerIndex = (bannerIndex < (bannerLocations.length - 1)) ? ++bannerIndex :0;
banner1.src = bannerLocations[bannerIndex];
//link1.href = bannerURLs[bannerIndex];
wait = true;
}
if(parseInt(banner2.style.left) <= -500){
banner2.style.left = 500;
bannerIndex = (bannerIndex < (bannerLocations.length - 1)) ? ++bannerIndex :0;
banner2.src = bannerLocations[bannerIndex];
//link2.href = bannerURLs[bannerIndex];
wait = true;
}
setTimeout("moveBanner()",100);
} else {
wait = false;
setTimeout("moveBanner()", displayTime * 1000);
}
}
</script>
REGISTRATION IN JS
<body onload="initVar(); moveBanner();">
</body>

I ran your code. Both methods executed without me having to make any modifications to the posted code. Is there possibly some other code that is overwriting the onload method?

The DotNetNuke best practice for binding to the "onload" property in JavaScript is to hook into JQuery's ready() method:
jQuery(document).ready( function() {
// put your code here
initVar();
moveBanner();
});
DotNetNuke 4.9.x and later ship with the jQuery JavaScript library included.

Have you edited DNN's Default.aspx? Otherwise, there isn't any way for you to have access to the body tag to add the onload attribute like you show.
How are you injecting this script? Are you using a Text/HTML module, are you using the Page Header Text setting for the page, are you adding it directly to the skin, have you written a custom module, or something else?
Instead of using the onload attribute on the body tag, I would suggest wiring up to that event in the script itself. If you're using any code to inject the script, you can ask DNN to register jQuery or a ScriptManager (for ASP.NET AJAX) so that you can use those libraries to wire the event up easily. If you can't guarantee that those are on the page, use the following:
function addLoadEvent(func) {
var oldonload = window.onload;
if (typeof window.onload != 'function') {
window.onload = func;
} else {
window.onload = function() {
if (oldonload) {
oldonload();
}
func();
}
}
}
addLoadEvent(function () {
initVar();
moveBanner();
});

I don't know much about asp.net but if you can put javascript code in your page, then you can try this alternative:
window.onload = function()
{
// any code here
}
This is the same as what you put in body tag.

The CSS left property takes a length, not an integer. You must have units for non-zero lengths. (Even when setting it using JavaScript!).

How to prevent iframe load event?

I have an iframe and couple of tables on my aspx page. Now when the page loads these tables are hidden. The iframe is used to upload file to database. Depending on the result of the event I have to show a particular table on my main page (these tables basically have "Retry","next" buttons...depending on whether or not the file is uploaded I have to show respective button).
Now I have a JavaScript on the "onload" event of the iframe where I am hiding these tables to start with. When the control comes back after the event I show a particular table. But then the iframe loads again and the tables are hidden. Can any one help me with this problem. I don't want the iframe to load the second time.
Thanks

mmm you said you're on aspx page,
I suppose that the iframe do a postback, so for this it reload the page.
If you can't avoid the postback, you've to set a flag on the main page just before posting back, and check against that while you're loading...
...something like:
mainpage.waitTillPostBack = true
YourFunctionCausingPostBack();
..
onload=function(){
if(!mainpage.waitTillPostBack){
hideTables();
}
mainpage.waitTillPostBack = false;
}

I am not sure what your problem is, but perhaps your approach should be a little different. Try putting code into the iframe what would call functions of the parent. These functions would display the proper table:
<!-- in the main page --->
function showTable1() {}
<!-- in the iframe -->
window.onload = function () {
parent.showTable1();
}
This would put a lot of control into your iframe, away from the main page.

I don't have enough specifics from your question to determine if the iframe second load can be prevented. But I would suggest using a javascript variable to check if the iframe is being loaded a second time and in that case skip the logic for hiding the tables,

This is my code
function initUpload()
{
//alert("IFrame loads");
_divFrame = document.getElementById('divFrame');
_divUploadMessage = document.getElementById('divUploadMessage');
_divUploadProgress = document.getElementById('divUploadProgress');
_ifrFile = document.getElementById('ifrFile');
_tbRetry = document.getElementById('tbRetry');
_tbNext=document.getElementById('tblNext');
_tbRetry.style.display='none';
_tbNext.style.display='none';
var btnUpload = _ifrFile.contentWindow.document.getElementById('btnUpload');
btnUpload.onclick = function(event)
{
var myFile = _ifrFile.contentWindow.document.getElementById('myFile');
//Baisic validation
_divUploadMessage.style.display = 'none';
if (myFile.value.length == 0)
{
_divUploadMessage.innerHTML = '<span style=\"color:#ff0000\">Please select a file.</span>';
_divUploadMessage.style.display = '';
myFile.focus();
return;
}
var regExp = /^(([a-zA-Z]:)|(\\{2}\w+)\$?)(\\(\w[\w].*))(.doc|.txt|.xls|.docx |.xlsx)$/;
if (!regExp.test(myFile.value)) //Somehow the expression does not work in Opera
{
_divUploadMessage.innerHTML = '<span style=\"color:#ff0000\">Invalid file type. Only supports doc, txt, xls.</span>';
_divUploadMessage.style.display = '';
myFile.focus();
return;
}
_ifrFile.contentWindow.document.getElementById('Upload').submit();
_divFrame.style.display = 'none';
}
}
function UploadComplete(message, isError)
{
alert(message);
//alert(isError);
clearUploadProgress();
if (_UploadProgressTimer)
{
clearTimeout(_UploadProgressTimer);
}
_divUploadProgress.style.display = 'none';
_divUploadMessage.style.display = 'none';
_divFrame.style.display = 'none';
_tbNext.style.display='';
if (message.length)
{
var color = (isError) ? '#008000' : '#ff0000';
_divUploadMessage.innerHTML = '<span style=\"color:' + color + '\;font-weight:bold">' + message + '</span>';
_divUploadMessage.style.display = '';
_tbNext.style.display='';
_tbRetry.style.display='none';
}
}
tblRetry and tblNext are the tables that I want to display depending on the result of the event.