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JavaScript - Undefined Value With Length Is Null Or Not An Object Message

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Undefined Value With Length Is Null Or Not An Object Message	View Content

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

Full Excel VBA Course - Beginner to Expert

Length Is Null Or Not An Object Error In Ie8

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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');">

Undefined Is Null Or Not An Object

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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.

Error In Ie8: Message: 'document.getelementbyid(...)' Is Null Or Not An Object

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Hi, first post here. I was working on code for opening a link in a new window when clicked. I read somewhere that it's a good idea to remove all of the javascript elements from the HTML. So I pieced it together and it works. But I get the following error in IE8:

Code:

Message: 'document.getElementById(...)' is null or not an object

Here's the relevant HTML:

Code:

<a href="http://www.samplesite.com" id="sampleid">Sample Text</a>

And here's the relevant javascript that I put in a seperate .js file:

Code:

function samplefct() {
window.open(this.href);return false;
}

window.onload = function()
{document.getElementById("sampleid").onclick = samplefct;
}

The code does work as planned. But I'd still like to get rid of the error. Can anybody think of a different way of stating the javascript that would perform the same thing and lose the error?

Any help would be greatly appreciated.
Thanks!
IB

Undefined Is Null Or Not An Object In A Validator

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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;
}
}}

Ie8 Only Error: 'undefined' Is Null Or Not An Object

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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.

Javascript Error: Undefined Is Null Or Not An Object (help Please!)

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Script5007: Unable To Get Value Of The Property 'style': Object Is Null Or Undefined

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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>

Em "'undefined' Is Null Or Not An Object" Only In Ie

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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.

.length Is Null

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For some reason i'm getting the error of "length is null". Which is from this .

Code:

function display_form(id) {
	//Create some variables
	var html = "";
	var container = "form_container";
	var menu = load_menu(id, false);

	//Get id
	 for ( var i = 0; i < menu.length; i++ ) {  
		alert(i);
	}
	
	http = getHTTPObject();
	http.onreadystatechange = function() {
		if ( http.readyState == 4 && http.status == 200 ) {
			document.getElementById(container).innerHTML = http.responseText;
		} else {
			document.getElemenyById(container).innerHTML = "Loading...";
		}
	}
	http.open( "GET", "includes/forms.php?form=" + id );
	http.send();
		
	//Watch input fields 
	//login_listener();
}/*

Here is the function:
Code:

function load_menu(menu, return_d) {
	//Availible menus
	var data = [];
	data [ 'login' ] = [ 'Login', 'Register', 'Recovery' ];
	data [ 'settings' ] = [ 'Profile', 'Account', 'something' ];
	
	 if (return_d == false) {
		return data[ menu ]; 
	} else {
		//Menu container ID's
		var cons = Array('menuitem1','menuitem2','menuitem3');
	
		for ( var i = 0; i < cons.length; i++ ) {
			document.getElementById(cons[i]).innerHTML += data[ menu ] [ i ];
		}
	}
}

Extra info:
id = login
menu = login

Null Is Null Or Not An Object Swfobject

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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

Error: Null Is Null Or Not An Object

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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!

"'null' Is Null Or Not An Object" For Slideshow Javascript

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String.length Function Returns Undefined

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Hello,

When I run the following code, the .Length function returns "undefined." Please help! This is driving me crazy.

Code:

		var strTest = 'test';
		alert(strTest.Length);

Using the typeof function, I know that JS is treating the variable as a string. Any suggestions?

'null' Is Null Or Not An Object

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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

Checking Xml Node For Null Or Undefined

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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.

Null And Undefined Values Being Returned From A Function

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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;

Js Error - Null Or Not An Object

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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

'null Or Not An Object' In Form Processing

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Hi

I have the below page. When form is submitted by clicking on the button the function checkform() is executed. Problem is that I am getting a

'entrystartday' is null or not an object error

on line

Code:

if (frm.entrystartday.value == 31) {

What is the problem and how can I fix it?

Thanks

Regards

Code:

<html>
<head>
    <title>test</title>
</head>
<body>
    <form id="theform" action="main.asp" method="post" onsubmit="return checkform()">
    <table style="width: 477px;">
        <tr>
            <td style="vertical-align: top;" class="boldwhite">
                Start Date
            </td>
            <td>
                <select id="entrystartday" name="entrystartday">
                    <option value="1">1</option>
                    <option value="2">2</option>
                    <option value="3">3</option>
                    <option value="4">4</option>
                    <option value="5">5</option>
                    <option value="6">6</option>
                    <option value="7">7</option>
                    <option value="8">8</option>
                    <option value="9">9</option>
                    <option value="10">10</option>
                    <option value="11">11</option>
                    <option value="12">12</option>
                    <option value="13">13</option>
                    <option value="14">14</option>
                    <option value="15">15</option>
                    <option value="16">16</option>
                    <option value="17">17</option>
                    <option value="18">18</option>
                    <option value="19">19</option>
                    <option value="20">20</option>
                    <option value="21">21</option>
                    <option value="22">22</option>
                    <option value="23">23</option>
                    <option value="24">24</option>
                    <option value="25">25</option>
                    <option value="26">26</option>
                    <option value="27">27</option>
                    <option value="28">28</option>
                    <option value="29">29</option>
                    <option value="30">30</option>
                    <option value="31">31</option>
                </select>
                /
                <select id="entrystartmonth" name="entrystartmonth">
                    <option value="1">1</option>
                    <option value="2">2</option>
                    <option value="3">3</option>
                    <option value="4">4</option>
                    <option value="5">5</option>
                    <option value="6">6</option>
                    <option value="7">7</option>
                    <option value="8">8</option>
                    <option value="9">9</option>
                    <option value="10">10</option>
                    <option value="11">11</option>
                    <option value="12">12</option>
                </select>
                /
                <select name="entrystartyear">
                    <option value="2010">2010</option>
                    <option value="2011">2011</option>
                    <option value="2012">2012</option>
                    <option value="2013">2013</option>
                    <option value="2014">2014</option>
                    <option value="2015">2015</option>
                    <option value="2014">2016</option>
                    <option value="2015">2017</option>
                </select>
                &nbsp;<span class="style1"><strong>&lt;= Select correct Start Date</strong></span>
            </td>
        </tr>
    </table>
    <table>
        <tr>
            <td class="style2">
                <input type="submit" value="save" name="submit" />
            </td>
        </tr>
    </table>
    <input type="hidden" name="view" value="<% = theview%>" />
    <input type="hidden" value="save" name="a" />
    <input type="hidden" value="<% = dateview %>" name="dateview" />
    </form>
    <script type="text/javascript">
        function checkform() {

            document.write("<P>right now 1: " + new Date() + "<P>");

            var frm = document.forms["theform"];

             if (frm.entrystartday.value == 31) {  
               alert('I am here');
            };

            document.write("<P>right now 2: " + new Date() + "<P>");
        };
    </script>
</body>
</html>

Please Help - Javascript Null Object Error

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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.

Error: Null Or Not An Object In Javascript

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Hello

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">

</script>

<style type="text/css">

</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