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JavaScript - Checking Xml Node For Null Or Undefined
Hi, im having a little difficulty checking if an XML node has a value, here the code:
var Divs=new Array("artist","bio","img","date","tickets","venue","street","city","country","headliner"); xmlDoc=xmlhttp.responseXML; for ( nodes in Divs ) { if(!xmlDoc.getElementsByTagName(Divs[nodes])[0].childNodes[0].nodeValue) { } else { document.getElementById(Divs[nodes]).innerHTML= xmlDoc.getElementsByTagName(Divs[nodes])[0].childNodes[0].nodeValue+"<br>"; } } This always throws up the error: document.getElementById(Divs[nodes]) is null ive tried putting the xmlDoc in a variable then checking if its null but no luck, also tried the same method against "undefined" but no luck either. Would be greatful if anyone has any suggestions. Thanks, Tom. Similar TutorialsIn order to better understand the DOM data structure, I am trying to write a JavaScript that will produce something like HTML from the DOM data structure. My current problem is that when I include a <br> tag in my source HTML, it reports that its parent is undefined, and this is breaking my code. So, given the following code, why does the <br> tag report that it's parent is undefined. Code: <html>
<head>
<title>br.parent</title>
<script type="text/javascript">
function brTest() {
var jBR = document.getElementsByTagName("br")[0];
alert("<br>.nodeType = " + jBR.nodeType +
"\n<br>.nodeName = " + jBR.nodeName +
"\n<br>.ParentNode = " + jBR.ParentNode);
}
</script>
</head>
<body onload = "brTest();">
<p>Now is <br> the time.</p>
</body>
</html>
Thanks for any help you can provide. Jerry I need to check to see if a cookie has been previously created: Code: var startnum = readCookie('a1');
if (document.cookie.indexOf('a1') == -1){
var startnum = "0";
}
Should line 2 be: Code: if (document.cookie.indexOf('a1') == null){
? Does == -1 do the same thing? I am using the following script on an e-commerce site to ensure that not both drop downs cannot be selected at the same time, as well as ensuring one must be selected at all times. Code: <script language="javascript"><!--
function validate(cart_quantity) {
if (((cart_quantity.elements['id[2]'].value == 9999) && (cart_quantity.elements['id[3]'].value == 9999)) || ((cart_quantity.elements['id[2]'].value != 9999) && (cart_quantity.elements['id[3]'].value != 9999))) {
alert('Please select only one option!');
cart_quantity.elements['id[2]'].value = 9999;
cart_quantity.elements['id[3]'].value = 9999;
cart_quantity.elements['id[2]'].focus();
return false;
}
}
//--></script>
The initial value of the drop down is set to 9999 off the bat. The problem with this code is that not all of my product pages have these 2 drop downs so I wanted to try and add in an if statement saying that if id2=9999 and id3 == null then pop up the error. That didnt work because I don't think it can be equal to null if it does not exist on the page. So instead I tried to do the following: Code: <script language="javascript"><!--
function validate(cart_quantity) {
cart_quantity.elements['id[3]'] = 99999;
if (((cart_quantity.elements['id[2]'].value == 9999) && (cart_quantity.elements['id[3]'].value == 9999)) || ((cart_quantity.elements['id[2]'].value != 9999) && (cart_quantity.elements['id[3]'].value != 9999))) {
alert('Please select only one option!');
cart_quantity.elements['id[2]'].value = 9999;
cart_quantity.elements['id[3]'].value = 9999;
cart_quantity.elements['id[2]'].focus();
return false;
}
if (((cart_quantity.elements['id[2]'].value == 9999) && (cart_quantity.elements['id[3]'].value == 99999)))
alert('Please select an option!');
cart_quantity.elements['id[2]'].value = 9999;
return false;
}
//--></script>
I tried to assign id3 a value of 99999 so that on pages that it doesnt get reassigned after (i.e pages it does not exist on) it will still be equal to 99999 and pop up the error according to the second if clause. Unfortunately that did not work either. Is there any other way I can do via javascript? <div class="check"> <iframe src=""></iframe> </div> Hello, As subject, unfortunately I cannot touch the html, but I can only add javascript possibly in the end of the html file. I have only the class check as reference, and cannot add any id or class into iframe, it's not a button, it should load with the page and check if it should display or not the iframe. I need to create a condition as the following I think: if (iframe.src equal to null) then display:none the div class check else do nothing. Hope you can help Thank you. Hello, I'm working on web apps for a company and unfortunately the websites work in Mozilla, chrom and IE9 but not in IE8. In IE8 the error message "undefined is null or not an object" is pointing to this line: temp = val.replace(/-/g, "/"); That line is inside a function. I'm not sure how to troubleshoot this...any help would be appreciated. Hello all. I am trying to track down why this custom validator is failing with an error that args is undefined. There are two funnctions - one works and one does not. Here they a the bold italicized item is where the error is being generated. Function validHygieneNote works as expected however. Code: function validClothingNote(val,args)
{
var radio_choice = false;
var chks = document.getElementById('clothingNote');
var chks2 = document.getElementsByName('clothingInadequate');
for (counter=0; counter < chks2.length; counter++) {
if (chks2[counter].checked){
var rad_val =chks2[counter].value;
}}
if((rad_val==1)|| (rad_val==2)) {
if ((chks.value=="") || (chks.value.length==0) || (chks.value==null)){
args.IsValid=false;
}
else {
args.IsValid = true;
}
}}
function validHygieneNote(val,args)
{
var radio_choice = false;
var chks = document.getElementById('hygieneNote');
var chks2 = document.getElementsByName('hygieneInadequate');
for (counter=0; counter < chks2.length; counter++) {
if (chks2[counter].checked){
var rad_val =chks2[counter].value;
}}
if((rad_val==1)|| (rad_val==2)) {
if ((chks.value=="") || (chks.value.length==0) || (chks.value==null)){
args.IsValid=false;
}
else {
args.IsValid = true;
}
}}
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. 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;
Hi, I started getting a wierd problem with my jscript program. Here im using jscript for client-side validation and upon email field submission,im getting undefined value with an error saying "length is null or not an object". All the values of fields prior to that are being obtained properly. Please help me out of this crisis What I am wanting to do is have my form open up a new part of the form when the previous sections are filled out. i.e name field shows, when it has content, the next field opens up for it to be filled out, and so on. I do not really understand what is happening to my code but it just tell me the following: Code: document.getElementById("#movingword") is null
How could the movingword be null when I have declared it in my code? The following is my code: Code: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="language" content="english">
<meta http-equiv="Content-Style-Type" content="text/css">
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
<title></title>
<style type="text/css">
body {
background-color:#000;
}
#scenery {
position:relative;
}
#moving {
position:absolute;
float:right;
top:100px;
left:50px;
}
#movingword {
position:absolute;
float:right;
top:0px;
left:0px;
}
</style>
<script type="text/javascript">
var a=120;
$(document).ready(function() {
document.getElementById("#movingword").style.top = a + "px";
});
</script>
</head>
<body>
<font color=white><h1> Hello World </h1></font>
<div id="scenery">
<img src="http://www.deshow.net/d/file/travel/2009-10/new-zealand-scenery-738-20.jpg" alt="">
<div id="moving">
<img src="http://maadinfo.com/images/blinking.gif" alt="">
</div>
<div id="movingword">
<font color="yellow"><font size="3"><b>This is the place</b></font><br>Welcome!</font>
</div>
</div>
</body>
</html>
Hiya, I would like to ask your help regarding this damned error message that comes out only in Internet Explorer and makes impossible to submit the form. The javascript code is: Code: function checkForm() {
var cname,
cspouse, cemail, chphone, ccellular, caddress, ccity, cstate, czip, cpets, cvolunteer, cadditional;
with(window.document.volApplForm)
{
cname = Name;
cspouse = Spouse;
cemail = Email;
chphone = HomePhone;
ccellular = Cellular;
caddress = Address;
ccity = City;
cstate = State;
czip = Zip;
cpets = Pets;
cvolunteer = Volunteer;
cadditional = Additional; }
var ALERT_TITLE = "Oops!";
var ALERT_BUTTON_TEXT = "Close";
if(document.getElementById) {
window.alert = function(txt) {
createCustomAlert(txt);
}
}
function createCustomAlert(txt) {
d = document;
if(d.getElementById("modalContainer")) return;
mObj = d.getElementsByTagName("body")[0].appendChild(d.createElement("div"));
mObj.id = "modalContainer";
mObj.style.height = document.documentElement.scrollHeight + "px";
alertObj = mObj.appendChild(d.createElement("div"));
alertObj.id = "alertBox";
if(d.all && !window.opera) alertObj.style.top = document.documentElement.scrollTop + "px";
alertObj.style.left = (d.documentElement.scrollWidth - alertObj.offsetWidth)/2 + "px";
h1 = alertObj.appendChild(d.createElement("h1"));
h1.appendChild(d.createTextNode(ALERT_TITLE));
msg = alertObj.appendChild(d.createElement("p"));
msg.innerHTML = txt;
btn = alertObj.appendChild(d.createElement("a"));
btn.id = "closeBtn";
btn.appendChild(d.createTextNode(ALERT_BUTTON_TEXT));
btn.href = "#";
btn.onclick = function() { removeCustomAlert();return false; }
}
if(trim(cname.value) == '')
{
alert('Please enter your name');
function removeCustomAlert() {document.getElementsByTagName("body")[0].removeChild(document.getElementById("modalContainer")); cname.focus();}
return false;
}
else if(trim(cemail.value) == '')
{
alert('Please enter your email');
function removeCustomAlert() {document.getElementsByTagName("body")[0].removeChild(document.getElementById("modalContainer")); cemail.focus();}
return false;
}
else if(!isEmail(trim(cemail.value)))
{
alert('Email address is not valid');
function removeCustomAlert() {document.getElementsByTagName("body")[0].removeChild(document.getElementById("modalContainer")); cemail.focus();}
return false;
}
else if(trim(chphone.value) == '')
{
alert('Please enter your valid phone number');
function removeCustomAlert() {document.getElementsByTagName("body")[0].removeChild(document.getElementById("modalContainer")); chphone.focus();}
return false;
}
else if(trim(ccellular.value) == '')
{
alert('Please enter valid cell phone number');
function removeCustomAlert() {document.getElementsByTagName("body")[0].removeChild(document.getElementById("modalContainer")); ccellular.focus();}
return false;
}
else if(trim(caddress.value) == '')
{
alert('Please enter your valid address');
function removeCustomAlert() {document.getElementsByTagName("body")[0].removeChild(document.getElementById("modalContainer")); caddress.focus();}
return false;
}
else if(trim(ccity.value) == '')
{
alert('Please enter your city');
function removeCustomAlert() {document.getElementsByTagName("body")[0].removeChild(document.getElementById("modalContainer")); ccity.focus();}
return false;
}
else if(trim(cstate.value) == '')
{
alert('Please enter valid state name');
function removeCustomAlert() {document.getElementsByTagName("body")[0].removeChild(document.getElementById("modalContainer")); cstate.focus();}
return false;
}
else if(trim(czip.value) == '')
{
alert('Please enter valid zip code');
function removeCustomAlert() {document.getElementsByTagName("body")[0].removeChild(document.getElementById("modalContainer")); czip.focus();}
return false;
}
else if(trim(cvolunteer.value) == '')
{
alert('Please fill in all fields');
function removeCustomAlert() {document.getElementsByTagName("body")[0].removeChild(document.getElementById("modalContainer")); cvolunteer.focus();}
return false;
}
else if(trim(cadditional.value) == '')
{
alert('Please fill in all fields');
function removeCustomAlert() {document.getElementsByTagName("body")[0].removeChild(document.getElementById("modalContainer")); cadditional.focus();}
return false;
}
else
{
cname.value = trim(cname.value);
cspouse.value = trim(cspouse.value);
cemail.value = trim(cemail.value);
chphone.value = trim(chphone.value);
ccellular.value = trim(ccellular.value);
caddress.value = trim(caddress.value);
ccity.value = trim(ccity.value);
cstate.value = trim(cstate.value);
czip.value = trim(czip.value);
cpets.value = trim(cpets.value);
cvolunteer.value = trim(cvolunteer.value);
cadditional.value = trim(cadditional.value);
return true;
}
}
function trim(str)
{
return str.replace(/^\s+|\s+$/g,'');
}
function isEmail(str)
{
var regex = /^[-_.a-z0-9]+@(([-_a-z0-9]+\.)+(ad|ae|aero|af|ag|ai|al|am|an|ao|aq|ar|arpa|as|at|au|aw|az|ba|bb|bd|be|bf|bg|bh|bi|biz|bj|bm|bn |bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|com|coop|cr|cs|cu|cv|cx|cy|cz|de|dj|dk| dm|do|dz|ec|edu|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs |gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|in|info|int|io|iq|ir|is|it|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr| kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mil|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|museum |mv|mw|mx|my|mz|na|name|nc|ne|net|nf|ng|ni|nl|no|np|nr|nt|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr |pro|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf |tg|th|tj|tk|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za| zm|zw)|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$/i;
return regex.test(str);
}
And when trying to submit the form, I get the error message: Code: Line: 177
Character: 4
Code: 0
Error Message: 'undefined' is null or not an object
URL: https://localhost/ruff/scripts/validationVol.js
Do you have an idea what could be the problem? As I checked line 177, it seems to be OK. I checked the web, but didn't find anything related to this message in a situation like this. Thanks in advance for your comments. Hi i have done some reading on the net today because i am getting an error on ie. I did find the javascript twice in my code, once in the header and once here, so i removed it from the header. I also changed to src to the full url. But i am still getting this and i dont know why. the file is located in the root directory. Code: Webpage error details User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; SearchToolbar 1.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; msn OptimizedIE8;ENUS) Timestamp: Sat, 30 Jul 2011 16:03:05 UTC Message: 'null' is null or not an object Line: 8 Char: 3894 Code: 0 URI: http://www.mysite.com/swfobject.js Code: <script type='text/javascript' src='$CONST_LINK_ROOT/swfobject.js'></script>
<script type='text/javascript'>
var s1 = new SWFObject('player.swf','player','400','300','9');
s1.addParam('allowfullscreen','true');
s1.addParam('allowscriptaccess','always');
s1.addParam('flashvars','file=$CONST_LINK_ROOT/movies/$sql_array->vid_id.flv');
s1.write('preview');
</script>
<embed src='$CONST_LINK_ROOT/flvplayer.swf?file=$CONST_LINK_ROOT/movies/$sql_array->vid_id.flv&autoStart=false' width='175' height='175' quality='high' type='application/x-shockwave-flash' pluginspage='http://www.macromedia.com/go/getflashplayer'></embed>
would appreciate any suggestions thanks. i was on 1.5 swfobject i did download 2.2 and im guessing all you do is replace the swfobject.js file to upgrade it, but what happened is it gives me this now. Code: Webpage error details User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; SearchToolbar 1.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; msn OptimizedIE8;ENUS) Timestamp: Sat, 30 Jul 2011 16:31:08 UTC Message: 'SWFObject' is undefined Line: 1283 Char: 1 Code: 0 URI: http://www.mysite/video_admin.php?type=v i dont mind going back to the old version i just need to get this working and im soooooooo lost lol ok another update, this is becomming maddening lol. once i have this line in the header php Code: <script type='text/javascript' src='$CONST_LINK_ROOT/swfobject.js'></script> I never have to use it again as long as they header php is included correct? This is what is driving me nuts, im back on 1.5 and it says its undefined Code:
but am in not defining it on this line? ---> var s1 = new SWFObject('player.swf','player','400','300','9');
<script type='text/javascript' src='swfobject.js'></script>
<script type='text/javascript'>
var s1 = new SWFObject('player.swf','player','400','300','9');
s1.addParam('allowfullscreen','true');
s1.addParam('allowscriptaccess','always');
s1.addParam('flashvars','file=$CONST_LINK_ROOT/movies/$sql_array->vid_id.flv');
s1.write('preview');
</script>
Another Update. I am back to the original question. null is null or not an object.. in my search i have found this found a solution. basically Internet Explorer is crappy and doesnt like the setAttribute property so had to change the onchange handler by directly changing the attrbute for the object like so. object.onchange = function() {} i have no idea what they means, does that mean i need to change swfobject.js or does that mean i have to change my xml request. and if it is the swfobject i have no clue what they mean or what lines 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! Hi I've implemented Busybox on a website to display FLV files in a popup player. This works fine, except for the following error in IE (FF is fine) when I close the popup: 'null' is null or not an object I think I've narrowed it down to the following block of code, but am stuck as to what to do from here. Code: var cl = new Element('img',{
'styles':{
width:'24px',
height:'24px',
position:'absolute',
top:'-20px',
right:'-20px',
'z-index':'100000'
},
'src':'bumpbox/closed.png',
'id':'closer'
})
cl.addEvent('click',function(e){
e = new Event(e).stop();
bg.dispose();
$(el).getChildren().dispose();
eff2.start({
'width':[maxw,1],
'height':[maxh,1],
'left': [endleft,middleH],
'top': [endtop, middleV+s]
})
})
The IE error is just giving me line number 1 of the php, but the error, I'm sure, lays in the Javascript. Many thanks I just really needed to know something about the whitespace between nodes in a tree structure. I know that Firefox's, Safari's, Chrome's and Opera's DOM treat the whitespace as a node. I am wondering what nodeType whitespace would return? Thank you all for any help + sugestions. can someone please help me to find out wahy I cant access the text value within the "author> tag using the following code? I get that "var y" is null. Thanks! Code: Content-type: text/html\n\n
<html>
<body>
<book>
<author>Moris</author>
</book>
<script type="text/javascript">
var x =document.getElementsByTagName("author")[0]
var y = x.childNodes[0];
document.write(y.value)
</script>
</body>
</html>
i was wondering: Has anyone here has used Node.js on a production service, app, or site ? If so, what type of project was it, and how is it working out? I'm building a new media site at work using node, and have been blown away by what i've seen/tested so far. Swapping the LAMP stack for just linux and js has really opened my eyes to just how wrong i had been approaching the back-end for so long. Does anyone else have this experience, or am i the only one getting 1,000X performance increases with node? try serving half a million dynamic pages in one hour at 10% cpu and <20 megs of ram on a 5-year old compaq consumer desktop using php; i dare you... i guess the main question is that it's so literally awesome on the bench, will those number hold once it starts getting used by the public? |
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