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JavaScript - Setting Image Element Ids
Ok guys, I am finally not being lazy anymore and going through my images and writing better code. But unfortunately it is proving to be slightly more difficult then what I thought. Basically, I cannot find a way to set a element ID using javascript.
Right now I am preloading my images through JavaScript and setting them like this Code: goodAfternoon = new Image(400,200) goodAfternoon.src = "Good Afternoon.gif" But I cannot find out how to setElementId() to the picture I am setting in JavaScript, I can do it in HTML by Code: <img src="Good Afternoon.gif" id = "pic_afternoon" name="goodAfternoon"> but this code displays the image which I do not want to do with all of my pictures right away. So how can I preload images and set the Ids of them without displaying them? Similar TutorialsI have the non-standard element Code: <testele></testele> In every browser except IE, this bit of JavaScript will successfully change the content of the above element Code: document.getElementsByTagName("testele")[0].innerHTML = 'hi';
However, if I change the <testele> to just a <span> (in the HTML and the JavaScript), it now successfully changes the content of the element in every browser, including IE. Is there any fix? I have searched around and tried a bunch to no avail. Thanks! This is really annyoing. I'm trying to set up an image's source from a function within the document's head, but to no avail. The code is something like this: ------------------------------------------------------- <head> .....js code..... function updatePieChart() { document.pie_chart.src = "piechart.php?p1&p2"; // php-generated image, with parameters } // A FUNCTION WHICH SUCCESSFULLY RUNS EVERY 2-3 SECONDS function ajax() { ....stuff..... // THE NEXT LINE DOESN'T WORK!!! // updatePieChart(); ...stuff..... } ....js code...... // THE NEXT LINE DOESN'T WORK!!! // updatePieChart(); </head> //THIS LINE WORKS LIKE A CHARM <body onload="updatePieChart();"> ....bla bla bla... <img src="#" name="pie_chart" /> ...bla bla bla.... </body> ------------------------------------------------------- As you can see, the function updatePieChart works wonderfully from the <body> tag of the function, but any attempt to call it from within the <head> tags fails. Also, I've tried to change the function updatePieChart so that it wouldn't call any php code and changed it to a simple document.pie_chart.src = "#"; but that still causes errors on the page when called from inside the <head> tags. On the other hand, if the function updatePieChart merely made an alert() call, then the ajax element works fine, and every so and so seconds I get an alert. Anyone, help? An explanation how come I can't set the image from within the <head> tags? Okay, so I have a canvas, and I want the user to be able to copy an image url and paste it into an input box, that will then set it as the canvas background image. Does anyone know how I can do this? I was thinking about using the OnChange method in the text input, but I cannot find any help with that online. My current Canvas Background is (In <head><script>) Code: var imgObg = new Image(); imageObj.src = "images/bg.png"; And my text input is Code: <form name="input" action="" method="get"> <input type="text" id="textboxBG" onchange="??" /> <input type="submit" value="Submit" /> </form> If you need more code, or would like to help me out more in depth, I would gladly paypal you a little money. I know this can't be too difficult! I REALLY want this done! I am very new to javascript(and these forums) and I am teaching my self to use the canvas element. I am trying to draw an image to the canvas but nothing is appearing. And I am getting no error in the chrome console. Can anyone see why? Code:
function RPGanimation(options)
{
this.initcanvas(options);
this.initbackground(options);
};
RPGanimation.prototype = {
initbackground: function(options){
this.background = new Image();
this.background.src = options.backsource;
this.background.onload = this.drawbackground();
},
initcanvas:function(options){
this.canvas = document.getElementById(options.canvasid);
this.context = this.canvas.getContext('2d');
this.dimensions = {width:this.canvas.width,height:this.canvas.height};
},
drawbackground:function(){
//document.write('<IMG SRC="Chrysanthemum.jpg">');
this.context.drawImage(this.background,0,0,this.dimensions.width,this.dimensions.height);
}
};
I create the object in a webpage with the canvas element created just before that script tag... Hi guys, I am currently stuck up on something.. check this page http://dev.andrewfopalan.com/new_slider.html Well for starters.. I am trying to mimic this effect.. http://www.vogue.com/ The slider on the very top.. A quick preview of what I did was.. I used this plugin.. easyslider().. And then edited it.. since I am still learning jQuery and javascript.. so I made changes to the controls... usually the elements for design.. all I did was that.. The first problem was how to make it center like the one on the vogue.. so it was done... Second the masking problem.. I had alot of trouble thinking how I am going to do this.. because whenever I used absolute position on masks and the controls, everything is messed up on all browser.. So my problem primarily was how to make the effect like vogue mask, so what I did was used opacity on the list... and add a class active that regains the opacity 1 on the middle part of the slider.. so that was done.. My follow up problem is whenever I am navigating through the slider.. I add the "active" class on the next item on the list.. up until there I am fine.. but when I am at almost at the end, at the 5th slider, I am not getting the active class? and after a couple of clicks on the "next".. it wont navigate through... here's the code for the next button: Code: // this gets the current location of the active slider on the list..
$("a#"+options.nextId).click(function(e){
var id= $('.active').attr('id');
//this removes the "active" class on the slider.. and then goes to the next item on the list.. and then add the class "active" to the next image slide..
$("ul li:nth-child("+(id)+")").removeClass('active').next().addClass('active');
// this is the plugin's animation to move to the next slide..
animate("next",true);
Heres' the code for the animate Code: function animate(dir,clicked){
if (clickable){
clickable = false;
var ot = t;
switch(dir){
case "next":
t = (ot>=ts) ? (options.continuous ? t+1 : ts) : t+1;
break;
case "prev":
t = (t<=0) ? (options.continuous ? t-1 : 0) : t-1;
break;
case "first":
t = 0;
break;
case "last":
t = ts;
break;
default:
t = dir;
break;
};
var diff = Math.abs(ot-t);
var speed = diff*options.speed;
if(!options.vertical) {
p = (t*w*-1);
$("ul",obj).animate(
{ marginLeft: p},
{ queue:false, duration:speed, complete:adjust,
}
);
} else {
p = (t*h*-1);
$("ul",obj).animate(
{ marginTop: p },
{ queue:false, duration:speed, complete:adjust }
);
};
heres the adjust code function Code: function adjust(){
if(t>ts) t=0;
if(t<0) t=ts;
if(!options.vertical) {
$("ul",obj).css("margin-left",(t*w*-1));
} else {
$("ul",obj).css("margin-left",(t*h*-1));
}
clickable = true;
if(options.numeric) setCurrent(t);
};
I am very still new to this jQuery thing.. but I am trying my best to learn.. Hope someone could teach me and help me on this... In fact: does input type=image belong to the form's elements collection, in ECMAScript ? It looks like not. When traversing the form's elements collection with classical javascript (document.forms[formname].elements), an input type="image" is not included. Is this an inheritance from old browsers interpretors? Does anyone know the reason for this omission? The bit of code in bold in the code below is giving me this error in IE: Error: Code: Webpage error details User Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; Trident/4.0; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.5.30729; Tablet PC 2.0; InfoPath.2; OfficeLiveConnector.1.4; .NET CLR 3.0.30729; OfficeLivePatch.1.3; MSN OptimizedIE8;ENGB) Timestamp: Tue, 16 Mar 2010 15:07:11 UTC Message: HTML Parsing Error: Unable to modify the parent container element before the child element is closed (KB927917) Line: 0 Char: 0 Code: 0 URI: http://www.mateinastate.co.uk/users/mateinastate Code: Code: if(document.getElementById('msn1').innerHTML=="")
{
document.getElementById('msn1').style.display='none';
}
if(document.getElementById('yahoo1').innerHTML=="")
{
document.getElementById('yahoo1').style.display='none';
}
if(document.getElementById('skype1').innerHTML=="")
{
document.getElementById('skype1').style.display='none';
}
if(document.getElementById('facebook1').innerHTML.toLowerCase().substr(0,18)=='<a href="http://">')
{
document.getElementById('facebook1').style.display='none';
}
else if(document.getElementById('facebook1').innerHTML.toLowerCase().substr(0,11)=='<a href="">')
{
document.getElementById('facebook1').style.display='none';
} else
{
document.getElementById('fbook-add').innerHTML='Facebook Profile';
}
What it's saying isn't actually true (I don't think)... this is how the section is laid out: Code: <div id="submenu1" class="anylinkcss"> <ul> <li class="contact-pm"><a href="/index.php?do=pm&act=new&to=$RateViewProfileUserName$&returnurl=$ReturnURL$">PM me</a></li> <li class="contact-email"><a href="/index.php?do=email&id=$RateViewProfileUserId$">E-mail me</a></li> <li class="contact-msn" id="msn1">$RateViewProfileUser-profile_msn$</li> <li class="contact-yahoo" id="yahoo1">$RateViewProfileUser-profile_yahoo$</li> <li class="contact-skype" id="skype1">$RateViewProfileUser-profile_skype$</li> <li class="contact-facebook" id="facebook1"><a href="$RateViewProfileUser-profile_facebook$"><span id="fbook-add"></span></a></li> </ul> </div> <script type="text/javascript" src="/html_1/js/contact-information.js"></script> Does anyone know why this might error in just IE? Hi, I'm relativly new to JS and brand new to the forum so you might need to dumb down your replys for my slightly lacking knowledge. That being said I do have a very solid grasp of html, css and am getting there with JS and its various frameworks. I'm integrating wordpress into an existing site for a friend and currently have the main blog page appear in a DIV. This is the best way to integrate in this case due to many reasons mostly of way the site is constructed. Code: <div class="scroll-pane" id="scrollbox"> WORDPRESS BLOG </div> My issue is that links within that DIV, in the blog, when clicked redirect the page. The simple answer to this would be to have them just open in a new page, which I can easily do with the below code. Code: function Init()
{
// Grab the appropriate div
theDiv = document.getElementById('scrollbox');
// Grab all of the links inside the div
links = theDiv.getElementsByTagName('a');
// Loop through those links and attach the target attribute
for (var i=0, len=links.length; i < len; i++) {
// the _blank will make the link open in new window
links[i].setAttribute('target', '_blank');
}
}
window.onload = Init;
But what I'd rather it do is have any link clicked inside the DIV to reload in that same DIV, similar to an iframe, but obviously without using an iframe, due to it's compatibility issues. Is this possible by editing the above code? If not what do I need? Thanks in advance for any help! Hi and hope someone can help, I'm reading a book on Javascript and I've been doing their tutorial on getting and setting cookies. Trouble is my code, and their supplied sample, don't work. It is supposed to display a very simple page with an image. When you click the image it is supposed to open up a new (very simple) page. Your help resolving this is greatly appreciated. My thanks, R Code follows... Code: <html>
<head>
<title>main page</title>
<script language=JavaScript>
var lastUpdated = new Date("Tue, 28 Dec 2010");
function getCookieValue(cookieName)
{
var cookieValue = document.cookie;
var cookieStartsAt = cookieValue.indexOf(" " + cookieName + "=");
if (cookieStartsAt == -1)
{
cookieStartsAt = cookieValue.indexOf(cookieName + "=");
}
if (cookieStartsAt == -1)
{
cookieValue = null;
}
else
{
cookieStartsAt = cookieValue.indexOf("=", cookieStartsAt) + 1;
var cookieEndsAt = cookieValue.indexOf(";", cookieStartsAt);
if (cookieEndsAt == -1)
{
cookieEndsAt = cookieValue.length;
}
cookieValue = unescape(cookieValue.substring(cookieStartsAt,cookieEndsAt));
}
return cookieValue;
}
function setCookie(cookieName, cookieValue, cookiePath, cookieExpires)
{
cookieValue = escape(cookieValue);
if (cookieExpires == "")
{
var nowDate = new Date();
nowDate.setMonth(nowDate.getMonth() + 6);
cookieExpires = nowDate.toGMTString();
}
if (cookiePath != "")
{
cookiePath = ";Path=" + cookiePath;
}
document.cookie = cookieName + "=" + cookieValue + ";expires=" + cookieExpires + cookiePath;
}
</script>
</head>
<body>
<h2 align=center> Welcome to my website </h2>
<br><br>
<center>
<script>
var lastVisit = getCookieValue("Last Visit");
if (lastVisit != null)
{
lastVisit = new Date(lastVisit);
if (lastVisit < lastUpdated)
{
document.write("<a href=\"WhatsNew.htm\">");
document.write("<img src=\"new.jpg\" border=0></a>");
}
}
var nowDate = new Date();
setCookie("LastVisit", nowDate.toGMTString(),"","")
</script>
</center>
</body>
</html>
I cannot get the cookie to save, I'm pretty new at web designing in general. If you could, the name of the cookie be cirulcook, also any advice you would have for me would be great! Code: <script><!--
function SETcookie(){
document.cookie="Selected="+document.getElementById('myList').selectedIndex;
}
function GETcookie(){
if (document.cookie){
eval(document.cookie);
document.getElementById('myList').selectedIndex=Selected;
}}// --></script>
</head>
<body onLoad="GETcookie()">
<select id="myList" onChange="SETcookie()">
<option value="1">Option 1</option>
<option value="2">Option 2</option>
<option value="3">Option 3</option>
<option value="4">Option 4</option>
</select>
Hello, I need your help. I have the following drop-down box as an example: [== FRUITS ==] apples oranges pairs kiwi lemon How can I use the code below to set the value of the drop down without knowing its value number (3)? document.getElementById('BOX1').value = 'pairs' Much thanks and appreciation for everyones help. Cheers, J Hi and hope someone can help. I'm setting up a fictitious shopping page which uses cookies to remember what a user has selected. The products are photographs that the user can select either framed or unframed versions and I'm trying to put a confirmation box if the user actually requests framed and unframed versions of the same photograph. The code I'm using actually worked before I tried to add this extra functionality but I can't work out how to test for this extra bit. Here's my code and it sets cookies with names as either lulworth01 for the unframed version or lulworth01f for the framed version. The bits that work are in black and my extra code for this test is in red. Any help would be appreciated. Thanks Rog Code: function getCookie(name)
{
var index = cart.indexOf(name + "=");
if(index == -1)
return null;
index = cart.indexOf("=", index) +1;
var endstr = cart.indexOf(";",index);
if (endstr == -1) endstr = cart.length;
return unescape(cart.substring(index, endstr));
}
function setCookie(name)
{
if ((name.charAt(name.length-1)='f') && (getCookie(name.substring(0,10))!=null)) {
confirm("You seem to have placed orders for both a mounted and framed image of the same photograph.\n\nIs that OK?");
} else {
alert("Thank you.\n\nYour basket has been updated.");
x=parseInt(getCookie(name)) || 0;
y=x+1;
var today = new Date();
var expiry = new Date(today.getTime()+28*24*60*60*1000); // plus 28 days
document.cookie=name+"="+y+";expires="+expiry.toGMTString();
cart = document.cookie;
}
}
Hi All, I would like to enable / disable my field validation based upon the status of a given checkbox in my form but I am unsure about how to "unset" the varibles that control the validation. If the user clicks the checkbox, this displays the fields ant enables my validation just fine. But if the user then unckeck the box, the field is hidden but the validation remains enabled and the form cannot be submitted. Here is my code: Code: if (document.getElementById("OnAirVariance").checked) {
var sprytextfield3 = new Spry.Widget.ValidationTextField("spryStartTime", "time", {validateOn:["blur"], format:"HH:mm:ss", useCharacterMasking:true});
var sprytextfield4 = new Spry.Widget.ValidationTextField("spryEndTime", "time", {format:"HH:mm:ss", useCharacterMasking:true, validateOn:["blur"]});
var sprytextfield5 = new Spry.Widget.ValidationTextField("spryMaterialID", "none", {validateOn:["blur"]});
var sprytextfield6 = new Spry.Widget.ValidationTextField("spryTitle", "none", {validateOn:["blur"]});
}else{
I NEED TO BE ABLE TO REVERSE THE SET VARIABLES SO THE VALIDATION WILL NOT STAY IN EFFCT
}
Thanks in advance for any help. Kind regards, Ken Hi, I'm banging my head off a brick wall with setting up a 3 dimensional array and trying to loop through it. I'm using the EJS framework (http://embeddedjs.com/). We currently have a 2D array set up to list out features. See below: topfeatures: [ "Feature 1", "Feature 2", "Feature 3", "Feature 4", "Feature 5", "Feature 6" ] <ul> [% for(var i = 0; i < this.topfeatures.length; i++) { %] <li>[%= this.topfeatures[i] %]</li> [% } %] </ul> However, the request we have requires headlines for each set of features. Headline 1 Feature1 Feature2 Feature3 Headline 2 Feature4 Feature5 Feature6 Any ideas how I can do this? Hi Guys , This is the urgnt requirement , I want to change the Browsers setting languge through java script ,and according to it , The data wht I enter dhould be change .Thanks In advance Hello! I have a superclass where I create a "div" element as a property and then proceed to try and set the element's "id" attribute in a subclass. Interestingly, if I create multiple instances of the subclass with different "id"s, they all end up having the last "id" I specify. I would like it if they retain the individual "id" I specify. Here is the code. Code: function Drag() {
this.ele = document.createElement("div"); }
function Icon(id) {
this.ele.id = id; }
Icon.prototype = new Drag();
var hello = new Icon("hello");
var goodbye = new Icon("goodbye");
What I'm trying to do is to do something similar to what this person wanted on their question: http://www.webmasterworld.com/javascript/3338586.htm I already have it so when the user clicks on one of the links, then it changes to the active class. But now I would like to have the first link already have the active class (which is the effect the links will have when the user clicks on it) and then have the same effect happen thereafter the user clicks on the links. Here is the Javascript: Code: <script type="text/javascript">
var hrefs=document.getElementsByTagName("a");
var hrefs=document.getElementsByClassName("links");
var preA="";
for(var i=0;i<hrefs.length;i++){
hrefs[i].onclick=function(){
if(preA!="" && preA!=this){
preA.className="links";
}
this.className="active";
preA=this;
}
}
</script>
Here is the CSS: Code: a.links:link {
color: #FFF;
text-decoration: none;
}
a.links:hover {
color: #96C;
text-decoration: none;
}
a.active {
color: #96C;
text-decoration: none;
}
Here is the HTML: Code: <a class="links" href="#">Curriculum Vitae</a> | <a class="links" href="#">Teaching Philosophy</a> | <a class="links" href="#">Artist Statement</a> I am trying to get my script working in FF, IE and Opera but the getAttribute isn't working for me. The domain name isn't getting picked up I have tried this: var dom_name = document.getElementById('dom_nm').getAttribute("value",2); and this: var dom_name = document.getElementById('dom_nm').getAttribute('value'); After this I use the domain name like this: Code: if (per2 == 0) {
item_desc = "Domain Name and DNS set up. Domain: "+dom_name+" Period: "+per1+"year"+" No Privacy.";
}
if (per2 > 0){
item_desc = "Domain Name and DNS set up. Domain: "+dom_name+" Period: "+per1+"year"+" Including: Privacy: "+per2+"year.";
}
document.getElementById('item_pay').setAttribute("value","item_desc");
( I also tried: Code: document.getElementById('item_pay').setAttribute('value') = item_desc;
but that didn't seem to work either ) The HTML is like this: Code: <div style="margin: 5px auto;"> <table> <th>Your New Domain Name Order</th> <tr><td>Product</td><td>Cost</td><td>Years (max. 10)</td><td style="text-align: right;">Total Cost</td></tr> <tr><td id="dom_nm" value="John.Doe"><?php echo "Domain: $N_dom.$N_tld" ?></td><td id="price" value = '<?php echo "$priceN" ?>' ><?php echo $priceN ?></td><td><input style="background-color: yellow; font-weight: bold;" type='TEXT' id="per_1" size = '10' value = '<?php echo "$period_1" ?>' ></td><td><input type='TEXT' id="total_1" style="text-align: right;" value = '<?php echo "$total_1" ?>'></td></tr> <tr><td>Domain Privacy</td><td>8.70</td><td><input style="background-color: yellow; font-weight: bold;" type='TEXT' id="per_2" size = '10' value = '<?php echo "$period_2" ?>'></td><td><input type='TEXT' id="total_2" style="text-align: right;" value = '<?php echo "$total_2" ?>'></td></tr> <tr><td>Total Order.</td><td> --- </td><td> --- </td><td><input type='TEXT' id="total_3" style="text-align: right; font-weight: bold;" value = '<?php echo "$total_3" ?>'></td></tr> </table> </div> The result is that I get a zero ( 0 ) where the domain should be. Like this: Domain Name and DNS set up. Domain: 0 Period: 2year Including: Privacy: 2year. Plus Free Blog Install. Any ideas what I am doing wrong ? Thanks Code: <script>
function myfunction(){
document.getElementById('myDIV').style.marginLeft++;
}
</script>
<body>
<div id="myDIV">
This is a DIV...
</div>
<p>
<a href="javascript:myfunction()">Do it!!</a>
So, what this code is supposed to do is, every time the user click on 'Do it!!', the 'myDIV' div goes to the right. The problem is, it works only one time, why? Greetings and salutations. My text and what I have been researching on the internet has not been very helpful in determining the code that I need to prevent a user from entering his/her information more than once. Here is my current code Code: <!DOCTYPE HTML PUBLIC "-//W3C//DTD.HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/htm14/loose.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Kudler Fine Foods Contact Page</title>
<meta http-equiv="Content-type" content="text/html; charset=iso-8859-1">
<!---Kami Demnyan
21 December 2009-->
<script type="text/javascript">
/*<![CDATA[*/
<!--This code ensures that the zip code and telephone numbers are actual numerical digits, not letters-->
function checkForNumber(fieldValue) {
var numberCheck = isNaN(fieldValue);
if (numberCheck == true) {
window.alert ("Please enter a numerical value");
return false;
}
}
<!--This code ensures that all of the fields contain text and I have it functioning now-->
function submitForm() {
if (document.forms[0].name.value == ""
|| document.forms[0].address.value == ""
|| document.forms[0].city.value == ""
|| document.forms[0].state.value == ""
|| document.forms[0].zip.value == ""
|| document.forms[0].phone.value == ""
|| document.forms[0].email.value == "") {
window.alert("Please enter your missing information");
return false;
}
else
return true;
}
function getCookie(NameOfCookie) {
if (document.cookie.length > 0) {
begin = document.cookie.indexOf(NameOfCookie+"=");
if (begin != -1) {
begin += NameOfCookie.length+1;
end = document.cookie.indexOf(";", begin);
if (end == -1) end = document.cookie.length;
return unescape(document.cookie.substring(begin, end)); }
}
return null;
}
function setCookie(NameOfCookie, value, expiredays) {
var ExpireDate = new Date ();
ExpireDate.setTime(ExpireDate.getTime() + (expiredays * 24 * 3600 * 1000));
document.cookie = NameOfCookie + "=" + escape(value) +
((expiredays == null) ? "" : "; expires=" + ExpireDate.toGMTString());
}
function delCookie (NameOfCookie){
if (getCookie(NameOfCookie)) {
document.cookie = NameOfCookie + "=" +"; expires=Tues, 02-Feb-10 00:00:01 GMT";
}
}
/*]]>*/
</script>
</head>
<body>
<h1> KUDLER FINE FOODS </h1>
<h2> JOIN OUR MAILING LIST</h2>
<!--This is where the user will input all of their information to join the mailing list-->
<form action="completeform.html" method="get" onsubmit="return submitForm();"
enctype="application/x-www-form-urlencoded">
<p>Name<br />
<input type="text" name="name" size="50" /></p>
<p>Address<br />
<input type="text" name="address" size="50" /></p>
<p>City, State, Zip <br />
<input type="text" name="city" size="30" />
<input type="text" name="state" size="3" />
<input type="text" name="zip" size="10"; onchange="return checkForNumber(this.value)"; /></p>
<p>Telephone<br />
<input type="text" name="phone" size="25" onchange="return checkForNumber(this.value)"; /></p>
<p>Email Address<br />
<input type="text" name="email" size="50" /></p>
<!--This is where the submit and reset buttons are located-->
<p><input type="submit" value="Submit Form" />
<p><input type="reset" value="Reset Form" />
</form>
</body>
</html>
I have created a new web page to link the duplicate cookie too, titled doubleinfo.html. This is what I am using to let the user know that their information has already been entered. My text is telling me that I need to look for a nextform() function, but I didn't have to write one so what would I need to do, if anything, to start the document.cookie = "name" codes? Any help would be greatly appreciated, thanks in advance. |
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