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JavaScript - Is It Possible To Preload An Image Directory?
I have more than a hundred images (small ones though), which is a cut-to-pieces large image arranged in tables that I want to preload. I have been looking for a preload script that could possibly load all images in a folder by wildcard and if possible via JavaScript.
Any suggestions? Any other language will be welcome as long as it will run on Linux. I have a good preload javascript here that I downloaded from hotscripts.com that displays a progress bar, percentage of download, and number of images downloaded. The bad thing is that creating an array out of a hundred images will be tedious especially with computer genereted filenames! If anyone knows of a program that could automate the process then we can forget the wildcard! Hehe! Hope someone has ideas . Thanks in advance. Similar TutorialsI want to use an image as a CSS background-image so I used the Image constructor to load the image: Code: (new Image()).src="http://www.mediafire.com/imgbnc.php/432b35f2cc3340ea03d25128ada294476c92189353679dfb7e9cc9dfde6498f06g.jpg"; but I noticed that the browser (Firefox) load the image from the URL and not from the memory when changing the background-image property (it takes about 1.5 seconds before showing the image, and every time I reload the page!) Hi! I'm just starting to learn java script and have a questions. If anyone could answer this it'd be great. When preloading images for use in things like mouseout/on/etc what is the proper code? var image1, image 2; image1 = new Image() image1.src = "" image2 = new Image() image2.src = "" OR var image1 image1.... var image2 image2.... The book I have list both but only the 2nd way I listed works. Why? Thanks Hello All! Brand new to Javascript here, so please forgive my basic question. I did a search but did not find exactly what I was looking for. My web site has a splash page with a large image broken into pieces and displayed in a table. I want to preload the images so the user doesn't see the table slowly "fill in" when using a slower internet connection. I have written a basic script, using the basic format of: <SCRIPT LANGUAGE="JavaScript"> Image1= new Image(50,60) Image1.src = "something.gif" Image2 = new Image(70,80) Image2.src = "somethingelse" Image3 = new Image(90,100) Image3.src = "lastsomething.gif" </SCRIPT> and saved it as a .js file and placed it in my sites root directory. Just to be safe, I've placed the images there too. (do I have to do that though?) Still, it does not seem to be working. Below is the head from my splash page. Have I missed somthing here? I thought that by putting the script reference in the head, the images would be loaded before the table came up, but such does not seem to be the case. Any help would be most appreciated. Thanks! <html> <head> <title>Finish Well Endurance</title> <meta name="generator" content="Namo WebEditor"> <link type="text/css" rel="stylesheet" href="http://www.fwe1.net/css/index.css"> <script type="text/javascript"language="javascript"src="loadimages.js"></script> </head> <body bgcolor="#464646" text="black" link="#464646" vlink="#464646" alink="#464646"> <table border="0" align="center" cellpadding="0" cellspacing="0" width="600"> I have almost 300 photos that I want to have in a gallery that is easy to use. I would like to avoid making 300 list items (as is necessary with all of the auto rotators and other jquery plug ins that I've found) but to have the images load straight from the folder after the rest of the website has loaded. It wold be nice if maybe there was a pretty horizontal scroll bar or something and the image in the middle of the page was biggest if possible, but I'm really not picky. I don't know what the best way is to display so many photos! They don't need captions or anything. Any ideas??? Thanks! Hi, I'm attempting to add the following functionality to my site. Essentially, two images are displayed with a link "View More". The user clicks "View More" and the two images are replaced by two new images. This can be repeated as required. It's a basic form of slideshow I guess, but after some googling all the tutorials etc available seem to be more aimed at fully blown shows, whereas I believe my problem is much more simple. The images are contained in a directory and are numbered like so: img1.jpg, img2.jpg. img3.jpg and so on. the code I came up with so far is PHP Code: <script type="text/javascript" language="JavaScript"> start = '<img src="gallery/img'; end = '.jpg" width="150" height="200" />'; function getImage() { var n = Math.ceil(Math.random() * 10); // i have 10 images var FirstImg=(start+n+end); var n = Math.ceil(Math.random() * 10); var SecondImg=(start+n+1+end); } /* so now I think I have two variables: FirstImg = <img src="gallery/img1.jpg" width="150" height="200" /> SecondImg = <img src="gallery/img4.jpg" width="150" height="200" /> but i'm now unsure how i'd go about displaying this on the page. ideally the HTML generated would be: <div class="pics"> <p><FirstImg></p> <p><SecondImg></p> <a href="#" onClick="return getImage()">View More</a> </div> */ </script> Am I on the right lines here or am I way off?? Appreciate some pointers. thanks a lot. Hi! I have a website that requires preloading images a lot. I would like to preload only the most important images first and display the page as quickly as possible. After that it will take at least 20 seconds before the user will need the rest of the images. Is there a way of making two preloading groups and have the second group load in background after the page is already visible? My current preload code is simply like this: <SCRIPT language="JavaScript"> if (document.images) { pic01= new Image(200,200); pic01.src="images/base.jpg"; pic02= new Image(200,200); pic02.src="images/grump1.jpg"; pic03= new Image(200,200); pic03.src="images/grump2.jpg"; pic04= new Image(200,200); pic04.src="images/grump3.jpg"; pic05= new Image(200,200); pic05.src="images/grump4.jpg"; pic06= new Image(200,200); pic06.src="images/love.jpg"; pic07= new Image(200,200); pic07.src="images/smile1.jpg"; pic08= new Image(200,200); pic08.src="images/smile2.jpg"; pic09= new Image(200,200); pic09.src="images/smile3.jpg"; pic10= new Image(200,200); pic10.src="images/smile4.jpg"; pic10= new Image(200,200); pic10.src="images/rotate.gif"; } </SCRIPT> Hi all If I pre-cache imgs like this ... (10 in all) Code: <head> <script type="text/javascript"> PreImage1= new Image(width,height); PreImage1.src = "images/navbtn/onbtn_1.gif"; PreImage2 = new Image(width,height); PreImage2.src = "images/navbtn/onbtn_2.gif"; PreImage3= new Image(width,height); PreImage3.src = "images/navbtn/offbtn_1.gif"; PreImage4 = new Image(width,height); PreImage4.src = "images/navbtn/offbtn_2.gif"; </script> Will imgs be read from cache if I then do this?... or have I missed smthg? Code: <body> <img src="images/navbtn/offbtn_1.gif" onmouseover=this.src="images/navbtn/onbtn_1.gif" onmouseout=this.src="images/navbtn/offbtn_1.gif" alt="" /> </div> low tech Hi Everyone, I have created 8 thumbnails of their larger full sized pictures. Next I created a "picdiv" with CSS attributes within a center division. The thumbnails sit just above the "picdiv". I need code to open the full pictures in the "picdiv" when I click on the thumbnail. I've tried an on-click function but can't get this working either. Can anyone help please? Anita Hello, I've some javascript code which preload the images for a photo gallery made of clickable thumbnails and the images to be shown. The script is structured to preload the images in order to have a smooth experience while browsing through the thumbnails but, as the images are needed in quite high quality and can't be compressed any further, the page is too slow to load. Basically, as the script sits between the head tags at the beginning of the page, it holds the loading of the whole page, leaving the user with a black page for a good 10 seconds on a fast connection. Is there any chance I can preload the images in such a way I don't have to hold the whole page from displaying while the images are loaded? It would be ideal to be able to display the contents of the page (logo, menu, 1st picture of the gallery and foot of the page) while the images preload in the background. Could please anybody help with this? Here is the code I'm using: <SCRIPT language=JavaScript1.1> var myimages=new Array() function preloadimages(){ for (i=0;i<preloadimages.arguments.length;i++){ myimages[i]=new Image() myimages[i].src=preloadimages.arguments[i] } } preloadimages("images/gallery/editorial/1.jpg","images/gallery/editorial/2.jpg","images/gallery/editorial/3.jpg","images/gallery/editorial/4.jpg","images/gallery/editorial/5.jpg","images/gallery/editorial/6.jpg","images/gallery/editorial/7.jpg","images/gallery/editorial/8.jpg","images/gallery/editorial/9.jpg","images/gallery/editorial/10.jpg","images/gallery/editorial/11.jpg","images/gallery/editorial/12.jpg","images/gallery/editorial/13.jpg","images/gallery/editorial/14.jpg","images/gallery/editorial/15.jpg","images/gallery/editorial/16.jpg","images/gallery/editorial/17.jpg","images/gallery/editorial/18.jpg","images/gallery/editorial/19.jpg","images/gallery/editorial/20.jpg","images/gallery/editorial/21.jpg","images/gallery/editorial/22.jpg","images/gallery/editorial/23.jpg","images/gallery/editorial/24.jpg","images/gallery/editorial/25.jpg") function MM_swapImgRestore() { //v3.0 var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc; } function MM_preloadImages() { //v3.0 var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array(); var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++) if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}} } function MM_findObj(n, d) { //v4.01 var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) { d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);} if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n]; for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document); if(!x && d.getElementById) x=d.getElementById(n); return x; } function MM_swapImage() { //v3.0 var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3) if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];} } </SCRIPT> and this is for the thumbnails: <a onmousedown='changeimage(myimages[0],this.href)'><img src="images/gallery/thumb1.gif" alt="1" width="16" height="16" border="0" /></a> <a onmousedown='changeimage(myimages[1],this.href)'><img src="images/gallery/thumb2.gif" alt="2" width="16" height="16" border="0" /></a> <a onmousedown='changeimage(myimages[2],this.href)'><img src="images/gallery/thumb3.gif" alt="3" width="16" height="16" border="0" /></a> <a onmousedown='changeimage(myimages[3],this.href)'><img src="images/gallery/thumb4.gif" alt="4" width="16" height="16" border="0" /><br /> </a> etc.... Any help would be much appreciated. Thanks paolo Hi, I am completely aware that Framesets are an outdated way of designing these days (I don't have time to redesign the site now), but I have a question:. Is there a way I can have a "Please wait.. Loading.." message of some sort on the "contents.html" frameset? It takes a while to load.. Code: <html> <head> </head> <frameset rows="130,*" framespacing="0" border="0" frameborder="0"> <frame name="banner" scrolling="no" noresize target="contents" src="title.html"> <frameset cols="523,493"> <frame name="contents" target="main" src="contents.html" scrolling="auto"> <frame name="main" src="letters.html" scrolling="auto"> </frameset> <noframes> <body> <p>This page uses frames, but your browser doesn't support them.</p> </body> </noframes> </frameset> </html> Thanks so much. Hey, I'm a javascript newbie and am frankensteining various bits of code I have managed to find on Lightboxes, preloading, and swapping image Basically, what I want to happen is to run the mouse over the thumbnails on the left side of the page and a larger version of that is in the middle, while information on the right changes to match the picture in the middle. The information is working and the thumbnails appear to be working- at least they go white when running the mouse over them. The problem is the center images aren't appearing at all. I think the following is the relevant information. Code: function MM_preloadImages() { //v3.0
var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function MM_findObj(n, d) { //v4.01
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_swapImage() { //v3.0
var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
function MM_setTextOfLayer(objId,x,newText) { //v9.0
with (document) if (getElementById && ((obj=getElementById(objId))!=null))
with (obj) innerHTML = unescape(newText);
}
Code: <img src="imagetmb.jpg" name="boxd" id="boxd" onmouseover="MM_swapImage('boxd','','whitebox.jpg','','image.jpg',1);MM_setTextOfLayer('info','','Info<br /><br />Ink on Bristol Paper<br/><br />13 x 17 in<br /><br>May 2011<br/>')" onmouseout="MM_swapImage('boxB','','imagetmb.jpg',1)"/>
I think it's because the images in the center don't have a source, only a name, but I'm not sure where I would fit that in. I tried putting it in the second set of code, but it did not work out. Hello, I'm not sure if this is the best forum for my question or not, but I'll explain what I'm doing and we'll see. I am trying to make a little easter egg hidden inside a web application and its going great except I'd like to hide my .gif files by changing their file extension to something like .dat instead so it won't be so obvious what they are. Basically all I really want to do is have an html image tag that points to a file who's extension is not gif, but really does contain gif content. (I want to mask the fact that the file is really a gif when looking at it in the directory listing.) So, my idea was I would point the <img src=""> tag's src attribute to a cgi script that could write out a Content-type: image/gif header and return the binary gif data. So, I did this and it worked great, but its really slow. (I output the image multiple times and animate it.) So, I thought I could maybe use Javascript to preload these cgi requests and cache them, but every attempt I've made to do this fails! It's like the browser doesn't want to cache the cgi requests. My method of attempting this was to create Image() objects in javascript and set their src attribute to my cgi script call and then set an onload to keep track of when they were all loaded. That seemed to work fine, but then when I try to display an image with the src tag equal to the cgi location (after they were all loaded) its like it goes and reads the code to pull it down again instead of using a cached copy because its really slow. So, then I thought, hey maybe I could just manually edit the binary content of the gif file (which has an extension like .dat) to also contain Content-type: image/gif\n\n embedded at the front of the file. So, I opened the binary file with a hex editor and inserted that text content at the front... but it didn't work. I had <img src="myfile.dat"/> Is there an easy way to make the browser recognize my gif file even if I don't use a gif extension? If not is there a way to preload and cache cgi responses with Javascript so that they don't keep reloading each time I refer to them? Any other ideas? Thanks.
Hello, First time on the forum and I am admittedly a complete noob, so forgive me for any grievous misconceptions. I am a teacher trying to create a bulletin board on my website where students, teachers, and parents can post messages. I am trying to use the site linoit.com I am trying to embed that site on my website using an iframe url: http://www.capretto.net/stickyboard.shtml My problem is that when you go to the message board on my site it asks your for a username and password to login to access my message board from linoit. I was hoping there is a scripts or other trick that will auto fill the username and password when the page loads so that the message board opens automatically. Not too worried about privacy, but I could distribute the username and password to all interested parents, teachers, etc. but in my experience one more step between students and the information they need can be the difference between them not receiving the info. I'd be happy to give any contributors credit on my site for their coding help. Thanks in advance. Hello all, I will start off by saying that i have little javascript knowledge. Ok, now that is out of the way, lol, I want to make a program or firefox extension or something to that nature that will build a Web Server Directory Index by scanning the server for all files and displaying them like this: I don't know where to start, or if javascript is capable of doing this. (if not could you suggest a language better equipped to do this? ) The reason for such a project is for my own personal security reasons. *gets on soap box* I want to know exactly what is going on behind a website before i let it run a bunch of code that could potentially harm my computer (i listen to security now, and i know how bad some Javascript can be) and if i am going to a website i don't know, i wanna scan, and see for myself if there is malicious code running. Now i know what your thinking... "hey kam... there is such a thing as a firewall / virus protection" but i am the kind of guy that want's to see for myself instead of trusting someone else program to tell me what is good and bad.... *gets down from soap box* any help would be absolutely amazing. Thx in advance, Kam I need someone to point me in the right direction... I have been tasked with creating a phone directory at work. I found an example that kind of works for what I need he http://www.mollerus.net/development/..._directory.cfm But we have a larger number of employees and I need to be able to sort the directory by first name, last name, or department. Can anyone show me where to go? Is there a download somewhere? I'll post the code below of what we're currently using. It is functional, but not pretty by any means, and needs altered to produce what we need. I don't know JavaScript, this is something I found a couple years ago that suited our purpose, but now it doesn't anymore. The Script: Code: function setUp(info) {
var v = document.getElementById('phonesearch').selectedIndex.toString();
var ln, fn, ext;
var arr = new Array();
var sel = document.getElementById('phonelist');
for (var i = sel.options.length-1; i >= 0 ; i--) { sel.options[i] = null; }
for(i = 0; i < phonelist.length; i++ ) {
fn = phonelist[i][0];
ln = phonelist[i][1];
ext= phonelist[i][2];
switch (v) {
// case "1" : zo = ln+', '+fn; zv = zo +' : '+ext; break;
case "2" : zo = fn+' '+ln; zv = zo +' : '+ext; break;
case "3" : zo = ext+' : '+ln+', '+fn; zv = zo; break;
default: zo = ln+', '+fn; zv = zo +' : '+ext; break;
}
if (info != '') {
if (zo.toUpperCase().indexOf(info.toUpperCase(),0) == 0) { arr.push(zo+'||'+zv); }
} else { arr.push(zo+'||'+zv); }
}
arr.sort(); // Like the original order, comment out this line!
var z = [];
for (i=0; i<arr.length; i++) {
z = arr[i].split('||');
sel.options[i] = new Option(z[0],z[1],false,false);
}
var z = 13; if (phonelist.length < z) { z = phonelist.length; }
sel.size = z;
if (info == '') { sel.focus(); }
}
The Form Code: <form name="menuform" onSubmit="return false">
<p class="style1">Select to search by first name, last name, or extension. Then click in the text box on the bottom and type in the first few letters of who/what it is you're looking for.</p>
<p class="style1">Then, simply click the entry you need.</p>
<select id="phonesearch" onchange="setUp('')" size="4">
<option value=""><i>Choose one</i></option>
<option value="1">Last name</option>
<option value="2" selected>First name</option>
<option value="3">Extension</option>
</select>
<br /><br />
<select id="phonelist" onclick="alert(this.value)"></select>
<br /><br />
<input type="text" id="srch" value="" onkeyup="setUp(this.value)" size="20">
<br /><a href="#"
onclick="sel=document.getElementById('srch');sel.value='';setUp('');sel.focus()">Search Clear</a>
</form>
is there some way to searching through multiple path or recursively searching through a path (folders and subfolders) using the code below which seems to search only one node in the tree? Many Thanks. there are basically subfolders in \documents and then subfolders therein. i would like to search it therein for all kinds of files/filenames based on "search criteria". one more thing - is it ok/advisable to use active x objects considering most modern browsers have it disabled or give warnings? Code: <script>
var Fo =new ActiveXObject("Scripting.FileSystemObject");
var StrOut = new String();
var FileName = new String();
var Extention = new String();
function FindFile(FOo)
{
var FSo = new Enumerator(FOo.Files);
for(i=0;!FSo.atEnd();FSo.moveNext())
{
if(FileName == "*" || FSo.item().name.slice(0,FSo.item().name.lastIndexOf(".")).toLowerCase().indexOf(FileName)>-1)
if(Extention == "*" || FSo.item().name.slice(FSo.item().name.lastIndexOf(".")+1).toLowerCase().indexOf(Extention)>-1){
StrOut += "<tr "+ ((i%2)? "":"bgcolor=#C4E3F2") +"><td width=50%><font class=find>" + FSo.item().name + "</font></td><td width=25%><font class=find>" + FSo.item().type + "</font></td><td width=50%><font class=find>"+ String(FSo.item().size/(1024*1024)).slice(0,3) +" MB</font></td></tr>";
i++
}
}
}
function Search()
{
FileName = (search.value.lastIndexOf(".")>-1)? search.value.slice(0,search.value.lastIndexOf(".")):(search.value.length>0)? search.value.toLowerCase():"*"; //Get Searched File Name
Extention = (search.value.lastIndexOf(".")>-1)? search.value.slice(search.value.lastIndexOf(".")+1).toLowerCase():"*"; // Get Searched File Extention Name
if(path.value.length>0 && Fo.FolderExists(path.value)){
StrOut = "<table border=0 width=100% cellspacing=0>"
FindFile(Fo.GetFolder(path.value));
outPut.innerHTML = StrOut+"</table>";
}
else alert("Insert Correct Path Address");
}
</script>
Code: <BODY topmargin="0" leftmargin="0">
<table border=0 width=100% cellspacing="0" style="border-collapse: collapse" cellpadding="2"><tr>
<td dir="ltr" bgcolor="#FFD9D9"><b><font face="Verdana" size="2">Filename :
</font></b> </td>
<td dir="ltr" bgcolor="#C4E3F2">
<input size=50 type=text id=search name=search class="Find"></td>
</tr><tr>
<td dir="ltr" bgcolor="#C4E3F2">
<p dir="ltr"></td>
<td bgcolor="#FFD9D9"><input size=50 type=hidden value="\Documents" id=path name=path class="Find" >
<input type=button value="Search" onClick=Search() class="Find"></td>
</tr><tr>
<td colspan=2 align=left bgcolor="#FFFFFF"><font face=Verdana size=2><b>Search Result</b></font><hr></td>
</tr><tr>
<td colspan=2 bgcolor="#FFFFFF"><div id=outPut></div></td>
</tr></table>
</BODY>
</HTML>
I would like to use functionality similar to DirectoryInfo and FileInfo using server-side javascript in ASP.NET, but neither are recognized. What are the equivalents, if they exist, in javascript?
Can someone explain how to deploy an application in red5 webapps directory? On a remote server? Or is this something I'd have to hire a consultant for? Thanks I have some basic HTML knowledge but rely pretty heavily on WYSIWYG editors (dreamweaver). I think this might be more of a PHP question and not necessarily require a js, but here it is. What I am trying to do is learn how to build a directory in a site that allows any visitor to the site to add A) the company's name, B) the site URL, and C) possibly a brief description. Ideally, the site would also have a drop down menu to select the category in which to post it. Is this too big an undertaking? Any help is greatly appreciated. And if anyone knows a good list of PHP actions that would be very helpful. |
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