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JavaScript - Null Reference Error In Javascript Function?
İ want to use this code but when the page opens, I get a null reference error. When I open the page a second time, this error doesn't occur.
I understand when the site caches, this error doesn't occur. The error comes from tb_show function. My code: <script type="text/javascript"> function writeCookie(CookieAdi) { var dtGun = 1 var strValue = "1" if (dtGun == null || dtGun == "") dtGun = 365; var d = new Date(); d.setTime(d.getTime() + (dtGun * 24 * 60 * 60 * 1000)); var zt = "; expires=" + d.toGMTString(); document.cookie = CookieAdi + "=" + strValue + zt + "; path=/"; } function readCookie(cookieadi) { var c = document.cookie; if (c.indexOf(cookieadi) != -1) { s1 = c.indexOf("=", c.indexOf(cookieadi)) + 1; s2 = c.indexOf(";", s1); if (s2 == -1) s2 = c.length; strValue = c.substring(s1, s2); return strValue; } } writeCookie('OnerFacebook'); if (readCookie('OnerFacebook') != 1) { tb_show('', 'http://www.mobilyala.com/OnerFacebook/?KeepThis=true&TB_iframe=true&height=500&width=300&modal=true', ''); } </script> What should I do for it? Similar TutorialsHello I am using a timer which goes down from 2 minutes to zero when 'jsp' is called. Timer is written in javascript. I am getting an error that document.form1.timerMin.value=<%=min%> is null or not an object. Here is the code (t.jsp): <% /* Default timer */ int min = 2; int sec = 5; /* Check for timer params */ try { String timerMin = request.getParameter("timerMin"); if (timerMin==null)timerMin=""; if (timerMin != null) { min = Integer.parseInt(timerMin); } String timerSec = request.getParameter("timerSec"); if (timerSec==null)timerSec=""; if (timerSec != null) { sec = Integer.parseInt(timerSec); } } catch(Exception m) { System.out.println("generated exception..............:"+m); } %> <script language="JavaScript" type="text/javascript"> <!-- /* Initialise timer */ var min = <%=min%>; // set the minutes var sec = <%=sec%>; // set the seconds function countDown() { sec--; if (sec == -1) { sec = 59; min--; } /* Write timer state to hidden form fields */ document.form1.timerMin.value=<%=min%> document.form1.timerSec.value=<%=sec%>; time = (min<=9 ? "0" + min : min) + " min and " + (sec<=9 ? "0" + sec : sec) + " sec "; document.getElementById('theTime').innerHTML = time; SD=window.setTimeout("countDown()", 1000); if (min == 0 && sec == 0) { window.clearTimeout(SD); } } window.onload = countDown(); --> </script> <style type="text/css"> <!-- .timeClass { font-family:arial,verdana,helvetica,sans-serif; font-weight:normal; font-size:10pt; } --> </style> <table width="100%"> <tr><td width="100%" align="right"> <span id="theTime" class="timeClass"></span> </td></tr> <form method="post" name="form1" id="form1" action="t.jsp" <td width="50%" valign="middle"> <input type="hidden" name="timerMin" value="<%=min%>"> <input type="hidden" name="timerSec" value="<%=sec%>"> <div align="center"><a href="javascript:form1.submit()" onMouseOut="MM_swapImgRestore()" onMouseOver="MM_swapImage('Image3','','/lms/images/submit_0.gif',1)"><img name="Image3" border="0" src="/lms/images/submit_0.gif" width="70" height="30"></a></div> </td> </form> Looking forward for an early reply. Thanks Hi I am using a custom form elements script in the link below: www_bristolstreet_co_uk/page/find_a_dealer.htm and an error for null object is appearing from this line: active = option[0].childNodes[0].nodeValue; Can anyone please help? I am a novice at Javascript but got this script working perfectly on my local machine - once I loaded it the live site it didn't work... any advice would be greatly appreciated. Hello, I hope you can help me, I have used a really simple image script which features 3 thumbnails, you click one thumbnail and it loads the image as a larger image. Works perfectly in Google Chrome, Firefox - and then I've come to try in IE8... works perfect BUT javascript error as follows: - Webpage error details User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; GTB6.6; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; MDDC; InfoPath.2; .NET4.0C) Timestamp: Fri, 31 Dec 2010 17:14:48 UTC Message: 'document.images.image0' is null or not an object Line: 13 Char: 1 Code: 0 Here is the code, what am I doing wrong? I can't spot it, theres a couple of threads online from 2005 about this script but none have helped me clear the error. Code: <html>
<head>
<script language="JavaScript">
image0 =new Image();
image1 =new Image();
image2 =new Image();
image0.src ="http://ec.europa.eu/information_society/activities/egovernment/images/project_logos/sample.jpg"
image1.src ="http://ec.europa.eu/information_society/activities/egovernment/images/project_logos/sample.jpg"
image2.src ="http://ec.europa.eu/information_society/activities/egovernment/images/project_logos/sample.jpg"
document.images['image0'].src=image0.src;
document.images['image1'].src=image1.src;
document.images['image2'].src=image2.src;
function image_click(clicks)
{
if(clicks==0){document.images['large'].src=image0.src;}
if(clicks==1){document.images['large'].src=image1.src;}
if(clicks==2){document.images['large'].src=image2.src;}
}
</script>
</head>
<body>
<a href="javascript:image_click(0)"><img src="http://ec.europa.eu/information_society/activities/egovernment/images/project_logos/sample.jpg" height="93" width="123" alt="" name="image0" border="0"/></a>
<a href="javascript:image_click(1)"><img src="http://ec.europa.eu/information_society/activities/egovernment/images/project_logos/sample.jpg" width="123" alt="" name="image1" border="0"/></a>
<a href="javascript:image_click(2)"><img src="http://ec.europa.eu/information_society/activities/egovernment/images/project_logos/sample.jpg" height="93" width="123" alt="" name="image2" border="0"/></a>
<img src="http://ec.europa.eu/information_society/activities/egovernment/images/project_logos/sample.jpg" align="middle" border="0" width="418" height="284" name="large">
</body>
</html>
Hey Guys, I wondered if anyone would be kind enough to look at an issue I am having running a Javascript on IE. The script works fine in FF and Chrome but chucks up an error in all versions of IE so the Menubar does not display child pages. Here's the Error: User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729) Timestamp: Tue, 16 Aug 2011 14:45:53 UTC Message: 'lastChild' is null or not an object Line: 31 Char: 3 Code: 0 The full script is he http://www.makingtrails.com/wp-conte...ks3/js/menu.js Any help much appreciated as the author of this script is not providing any support. Thanks Jon Hi I am having trouble with a script. I cannot figure out why I get the message: error: null is null or not an object (In IE8) The site is: www.rayburns.com I have check the javascript for the navigation bar and for the rotating images and cannot see what is missing. Not sure what is not being called. Can someone please help with this. Thank you in advance! Image of the output: http://i.imgur.com/jqzhJxb.png What I'm trying to do, is pass an object by reference so that I can use it in other scripts, and allow the current script to change the object's value when appropriate. What's happening: It passes correctly, you can see that my var_dump of the object before the function call is 30. After the function call, it becomes 60. Also, it writes "now60" to the document as instructed. When I call the function the second time, it does nothing. No error, no repeat of writing now60 to the document, etc. And in the last var_dump, which is after the second function call - you can see that the value remained 60. Why? Thanks for your help! Code: PHP Code: var quickChallengeTimer = {timer:30}; var quickChallengeQuestion; var quickChallengeAnswer; var quickChallengeResponse; function quickChallenge(quickChallengeTimerfunc, quickChallengeQuestion, quickChallengeAnswer) { if (typeof quickChallengeResponse == 'undefined') { switch (quickChallengeTimerfunc.timer) { case 30: quickChallengeTimerfunc.timer = 60; quickChallengeResponse = 'undefined'; document.write("now60"); break; case 60: quickChallengeTimerfunc.timer = 120; quickChallengeResponse = 'undefined'; document.write("now120"); break; default: document.write("Error"); break; } } console.dir(quickChallengeTimerfunc.timer); } var_dump(quickChallengeTimer); quickChallenge(quickChallengeTimer); var_dump(quickChallengeTimer); quickChallenge(quickChallengeTimer); var_dump(quickChallengeTimer); Hi all, I have written the following javascript code which makes a simple calculation and writes between the <span> tags using Inner HTML My code is: Code: <html>
<head>
<script type="text/javascript">
function hesapla() {
kredimiktari = document.hesapla.miktar.value
kredivadesi = document.hesapla.vade.value;
faiz = document.hesapla.faiz.value;
ayliktaksit1 = (kredimiktari * faiz) / kredivadesi;
geriodeme1 = kredimiktari * faiz;
document.getElementById('ayliktaksit').innerHTML = "<strong>Taksit / Ay :</strong>" + ayliktaksit1;
document.getElementById('geriodeme').innerHTML = "<strong>Taksit / Ay :</strong>" + geriodeme1;
}
</script>
</head>
<body>
<form name="hesapla">
<input type="text" name="miktar" value="Kredi Miktarı" onfocus = "if (this.value == 'Kredi Miktarı') this.value = '';" onblur = "if (this.value == '') this.value = 'Kredi Miktarı';" />
<input type="text" name="vade" value="Kredi Vadesi" onfocus = "if (this.value == 'Kredi Vadesi') this.value = '';" onblur = "if (this.value == '') this.value = 'Kredi Vadesi';" />
<input type="text" name="faiz" value="Faiz Oranı" onfocus = "if (this.value == 'Faiz Oranı') this.value = '';" onblur = "if (this.value == '') this.value = 'Faiz Oranı';" />
<div id="gosterim"><span id="ayliktaksit"></span><span id="geriodeme"></span></div>
<input type='button' value='Hesapla' onClick='hesapla()'><br><br>
<img src="images/dot2.png" width="180" height="2" alt="dot"/>
</form>
</body>
</html>
I am really confused as similar code on Tizag web site works fine. Code: <script type="text/javascript">
function changeText(){
document.getElementById('boldStuff').innerHTML = 'Fred Flinstone';
}
</script>
<p>Welcome to the site <b id='boldStuff'>dude</b> </p>
<input type='button' onclick='changeText()' value='Change Text'/>
Could anyone tell me what the wrong thing is about my code Many thanks in advance telmessos Hi, I have a button that when you click it displays the results of my db in a div. What I am trying to do is to get the results to update every five seconds. I thought setTimeout was the best way to achieve this. However I am getting the error message that ID is not defined on the setTimeout line. I thought it would automatically input ID into the fields marked ID when the onloadXMLDocRefresh('File.php','txtHint') button is clicked? The button works to load the script, but the refreshing the div is not. My script is: Code: <script type="text/javascript">
function loadXMLDocRefresh(File,ID){
if (window.XMLHttpRequest) {
xmlhttp=new XMLHttpRequest();
}
else {
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function(){
if (xmlhttp.readyState==4 && xmlhttp.status==200){
document.getElementById(ID).innerHTML=xmlhttp.responseText;
timer = setTimeout('loadXMLDocRefresh(File,ID)',5000);
}
}
xmlhttp.open("POST",File,true);
xmlhttp.send();
}
</script>
I know I shouldn't be having this problem at this stage. But what have I done wrong? I have my main page, I have my onload page and in that onload page I call a function: And then I get the error message: Fatal error: Call to undefined function OpenChat() The main page code (I've cut out the irrelevant scripts); Code: <?php
session_start();
if (!(isset($_SESSION['login']) && $_SESSION['login'] !='')){
header ("Location: Welcome.php");
}
$Sfullname=$_SESSION['fullname'];
$SMyPId=$_SESSION['MyPId'];
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<html>
<title></title>
<head>
<script type="text/javascript">
function OpenChat(Msg){
loadgetdiv();
document.getElementById('<?php echo $Newdiv; ?>').style.display="block";
loadChatComplex('<?php echo $NewThisFile; ?>','<?php echo $Newdiv; ?>',Msg);
}
</script>
<script type="text/javascript">
function loadChatCheck(File,ID,Tile,TID){
loadQuickCheck(File,ID);
dodo = setInterval(function(){loadQuickCheck(Tile,TID)},5000);
}
</script>
<script type="text/javascript">
function loadQuickCheck(File,ID){
if (window.XMLHttpRequest) {
xmlhttp=new XMLHttpRequest();
}
else {
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function(){
if (xmlhttp.readyState==4 && xmlhttp.status==200){
document.getElementById(ID).innerHTML=xmlhttp.responseText;
malaky = setInterval(function(){loadQuickCheck(File,ID)},20000);
}
}
xmlhttp.open("POST",File,true);
xmlhttp.send();
}
</script>
</head>
<body onload="loadChatCheck('getCheckNewMessages.php','txtHintCheckNewMessage','getFriendsOnline.php','txtHintShowFriends')">
<div class="mainpage">
<?php include("headermenu.php"); ?>
<div id="txtHintShowFriends"></div>
<div id="txtHintCheckNewMessage"></div>
<br /><br />
</body>
</html>
AND the onload/getCheckNewMessages.php is PHP Code: <?php session_start(); if (!(isset($_SESSION['login']) && $_SESSION['login'] !='')){ header ("Location: Welcome.php"); } $SMyPId=$_SESSION['MyPId']; include("dbconnect.php"); $result = mysql_query("SELECT COUNT(*) as newchat FROM chat WHERE chattee='{$SMyPId}' AND stat='new'"); $row = mysql_fetch_assoc($result); $total=$row['newchat']; echo 'This is ' . $total .'<br />'; if ($total >=1){ $result = mysql_query("SELECT * FROM chat WHERE chattee='{$SMyPId}' AND stat='new'"); while($row = mysql_fetch_array($result)){ $doormouse=$doormouse . ';' . $row['ChatID']; } $listees=explode(';',$doormouse); foreach($listees as $listor){ echo 'This is ' . $listor . '<br />'; $result = mysql_query("SELECT * FROM chat INNER JOIN allusers ON chat.chatter=allusers.PId WHERE chat.ChatID='{$listor}' "); while($row = mysql_fetch_array($result)){ echo "{$SMyPId};{$row['chatter']};{$row['fullname']};{$row['ref']}"; } echo $battlebox . '<br />'; $steptoe=OpenChat($battlebox); } $sql="UPDATE chat set stat='' WHERE ChatID='{$chatID}' "; mysql_query($sql,$con) or die(mysql_error()); } ?> Needless to say I am trying to create an instant chat. Hi everyone, Does anybody know where I can download a decent Javascript reference in eBook format ?? Hello, I'm working on some php and javascript. I have php creating some forms using values from a database and wrapping them in divs called showform1, showform 2 etc I then want to use Javascript to show one form at a time when I click on a tickbox. So I've got it working so when you click on a checkbox and it shows the right form, but I want it to hide all the others first so it only shows one at a time if possible. When I do this is errors saying document.getElementById(showform1) is null - it does this for all the forms not just the first one. My php goes like this: PHP Code: $i=1; //loop through all things in db while ($info_query = mysql_fetch_assoc($info)) { ?> <label>Item <?php echo $i;?></label> <input type="radio" name="show" value="show" onclick="showhide(this.value,'showform<?php echo $i;?>')"/> //here's the div with the dynamically generated ID... <div id="showform<?php echo $i;?>" style="visibility:hidden;height:0px;"> <p> info for item 1 </p> </div> //increment the counter so the next div has a different name $i=$i+1; } My Javascript looks like this: Code: <script type="text/javascript">
function showhide(radval,divid)
{
if(radval=="show")
{
<?php
//hide them all first
$i=1;
while ($details_query = mysql_fetch_assoc($details))
{?>
var showform<?php echo $i;?>;
document.getElementById(showform<?php echo $i;?>).style.visibility="hidden";
document.getElementById(showform<?php echo $i;?>).style.height="0px";
<?php
$i=$i+1;
}
//then show just the one ticked
?>
document.getElementById(divid).style.visibility="visible";
document.getElementById(divid).style.height="auto"
}
}
</script>
the details and info queries are the same query...each looping through the same data. It works if I don't hide all the values first, and shows each form when I tick the box, but if I try to hide them all and THEN make one visible, the first line that hides the divs always errors. I've moved the JS around to the footer, the header in case its because stuff hasn't loaded yet, but it doesn't make sense as it has loaded to work to show the div. Really appreciate your help. Thanks, Nicola Hi, I am getting an error on this code - sometimes! - and I'm not sure what it is. If I run this as is there is no error. If I add it into another page with other stuff it's ok for a while and then I get an error. So, I added my new page block my block to this code and waited for the error to appear so I could determine a conflict - but it was fine. And then a few clicks later the error. This is the error in IE. In Firefox it seems to be fine lol. Line 159 Char 3 'window.document.sendform.message_text' is null or not an object Can someone make any suggestions? Code: <script language="JavaScript" type="text/javascript">
maxlen = 160;
countLen();
function countLen()
{
message_text = window.document.sendform.message_text.value;
realLength = message_text.length;
if (realLength>maxlen)
{
realLength = maxlen;
window.document.sendform.message_text.value = message_text.substring(0,maxlen);
}
message_text = window.document.sendform.message_text.value;
// del enter
var m = message_text.match(/[\r\n]/);
if (m !== null)
{
window.document.sendform.message_text.value = message_text.replace(/[\n\r]/g, '')
}
window.document.sendform.messlen.value=maxlen-realLength;
}
</script>
<cfset thismessage = "Hi, is this a start">
<cfform action="step2.cfm" method="post" id="sendform" name="sendform">
<cfoutput><textarea id="styled" name="message_text" onkeypress=countLen() onkeydown=countLen() onkeyup=countLen() onchange=countLen() onmouseover=countLen() rows="4">#thismessage#</textarea></cfoutput>
<table width="331" border="0" cellpadding="0" cellspacing="0">
<tr>
<td width="5"></td>
<td width="26"><cfoutput>
<input name="messlen" type="text" value="160" class="counterField" onFocus="this.form.message_text.focus();" /></cfoutput></td>
<td width="300">characters remaining</td>
</tr>
</table>
</cfform>
Thanks! Much appreciated! Kind regards, jo I'm working on this website and some contents are set up in arrays. How do you refer variables to work with arrays. I need the correct syntax.
I just started learning javascript, and it'd be cool if I could find some kind of javascript reference site similar to php.net/manual with a quick reference search. After looking through google for a long while, all I could find was tutorial sites or reference books with the only way to navigate them is through boring tables of contents. Does such a place exist? Or what's the next best thing?
Whenever i try to use this function it gives me either - NaN, or undefined what am i doing wrong? The objective of these functions are to change x and y coordinates into SAN (Simplified Algebraic Notation) for use in the Chess Game's DataFile (PGN file format). Live Running DHTML App: http://daomingjin.googlepages.com/ChessManager.html 140kb Zip-Archive: http://daomingjin.googlepages.com/ScoreMatev1.zip here are the functions in Question: Code: function XCoordToSAN(x)
{
// Convert the x coordinate of the piece to partial SAN (Simplified Algebraic Notation)
for(var xCoord = 0; xCoord > xCoord * 7; xCoord++)
{
if(x == xCoord * BlockSize)
{
var SANx = xCoord;
}
}
return SANx;
}
function YCoordToSAN(y)
{
var Letters = ["A", "B", "C", "D", "E", "F", "G", "H"];
// Convert the y coordinate of the piece to partial SAN (Simplified Algebraic Notation)
for(var yCoord = 0; yCoord > yCoord * 7; yCoord++)
{
if(y == yCoord * BlockSize)
{
var SANy = Letters[yCoord];
}
}
return SANy;
}
this is how i'm calling the functions: Code: var oldPGNx = XCoordToSAN(oldXposition);
var oldPGNy = YCoordToSAN(oldYposition);
var newPGNx = XCoordToSAN(newXposition);
var newPGNy = YCoordToSAN(newYposition);
NewPGNData = oldPGNx + oldPGNy + "-" + newPGNx + newPGNy + " ";
// Finally update the Data
document.getElementById("PGNArea").value = OldPGNData + NewPGNData;
I have a bug that is only seeming to effect IE 8:. It seems to have a problem with this line: theSelectBox.selectedIndex = -1; This is where my full page is: http://www.mauirealestate.net/advancedsearch-rets.php Also has a weird display issue in IE8, but not in "compatibility view", which the bug may fix. Works and looks beautiful is Safari and Firefox. Any suggestions are helpful. Hello, Error Console tells me : exp is null Line 10 This does not make any sense to me. Could someone look at the short script below and tell me why I get this message? I know how to make this script work, but I just want to understand why function changePar cannot access the variable exp in the script below. Thank you very much. <code> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title> Exercise 2</title> <meta http-equiv="content-type" content="text/html;charset=UTF-8" /> <script type="text/javascript"> exp=document.getElementById("experiment"); function changePar() { exp.getElementsByTagName("button")[0].onclick=function() { document.getElementById("changingParagraph").innerHTML="Hello World"; } } window.onload=changePar; </script> </head> <body> <div id="experiment"> <button>Click Here</button> </div> <p id="changingParagraph"></p> </body> </html> </code> Hi, I have added an validation script for Pizza menu. Validation working fine in all browsers except IE. When I working in IE8 it throws an error "length is null or not an object error in IE8". Please help me. See Java script code below: <script> function UnCheckRadios(radioButtonGroupName) { var formName = "frmOrder"; var form = document.forms[formName]; alert(form); var noOfRadioButtons=form[radioButtonGroupName].length; for(var x=0;x<noOfRadioButtons;x++) { chk=form[radioButtonGroupName] .checked=false; } } </script> PHP code: <input type="radio" id="<?=$subitem['subgroup_id'];?>_comboleft" name="<?=$subitem['subgroup_id'];?>_comboleft" value="<?=$subitem['id'];?>:Left Side" onclick="UnCheckRadios('<?=$subitem["subgroup_id"];?>_combowhole');"> |
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