Tainted Canvas - JavaScript Discussion Boards

Re: Hidden field value in javascript

Kornfeld Eliyahu Peter12-Nov-13 19:19

Kornfeld Eliyahu Peter

12-Nov-13 19:19

Can you show the PageLoad function?

I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is (V).

Re: Hidden field value in javascript

vkEE3-Dec-13 10:35

vkEE

3-Dec-13 10:35

This is the syntax, to be placed with in the body of email:

<asp:hiddenfield id="hdnCreateDate" runat="server">
var createdate = '<%=hdnCreateDate.Value%>';

Re: Hidden field value in javascript

Amir Hamza Md. Kayes6-Dec-13 9:16

Amir Hamza Md. Kayes

6-Dec-13 9:16

try it in jquery ready function.
$(document).ready(function()
{
var hiddenVal=$("#YourId").val();
});
if you use master page in aspx, then you can find the element by name also.
$("input[name='elementName']")

Script to determine the optimal weight man

bosko18-Nov-13 1:11

bosko1

8-Nov-13 1:11

is there a script to determine the optimal weight man?

Re: Script to determine the optimal weight man

Richard MacCutchan8-Nov-13 1:27

Richard MacCutchan

8-Nov-13 1:27

How would you define the optimal weight in the first place? You would need a list that contains all the other parameters that woould lead you to the correct value.

Veni, vidi, abiit domum

Re: Script to determine the optimal weight man

bosko18-Nov-13 9:47

bosko1

8-Nov-13 9:47

whether he uses a loop if , switches .

Re: Script to determine the optimal weight man

Richard MacCutchan8-Nov-13 22:51

Richard MacCutchan

8-Nov-13 22:51

You can use anything you like, but first you need to know what data you are feeding in, and what algorithm you will use to transform it to the required result.

Veni, vidi, abiit domum

Tainted Canvas

Paulo Augusto Kunzel31-Oct-13 1:55

Paulo Augusto Kunzel

31-Oct-13 1:55

Hello,

I've being trying to get some animations done in a canvas which are quite similar to Create an HTML5 (and JavaScript) Maze Game with a timer[^]. Unfortunately I've got the same erro that happens on the project's article. Unless you use Firefox you'll get:

Unable to get image data from canvas because the canvas has been tainted by cross-origin data. 
Uncaught SecurityError: An attempt was made to break through the security policy of the user agent.

From my research, you can add to google chrome shortcut the extension --disable-web-security or host the files in a localhost server.

Both ways can make it work, but I would like to know if there is a way for cross-origin not to taint the canvas? Something like a property from the canvas that I could disable/enable or some other coding related solution..

There are no secrets to success. It is the result of preparation, hard work, and learning from failure. Colin Powell

Re: Tainted Canvas

enhzflep10-Nov-13 2:49

enhzflep

10-Nov-13 2:49

I sure hope not - if there was, what's to stop malicious code from loading images from your local file-system?

Just use a localhost server. You can write one in c++ that compiles to a 25kb executable. Of course, you could download Apache or a different one of your choosing.

"Science adjusts its views based on what's observed. Faith is the denial of observation, so that belief can be preserved." - Tim Minchin

Is there any way to avoid activex in javascript ?

nnithiyanand30-Oct-13 0:27

nnithiyanand

30-Oct-13 0:27

In need of desperate guidance

1. Is there any way to avoid activex in javascript for reading
Documents and constructing xmls?

2. Actual there is an problem with the client, he doesnt like the IE security settings like "Access data source across domains" under Miscellaneous and "Run ActiveX controls and plug-ins".

And It should support IE 7,8 and above.If possible that should work in cross browser also.

Currently in Javascript, we are using the below codes:

var xmlDoc = new ActiveXObject("MSXML2.DOMDocument"); -->for xml construction.

var stm = new ActiveXObject("ADODB.Stream"); --> for reading the doc and docx file from client temporary path.

What is needed:

1. We need to find an alternate in order to avoid using the ActiveXobject.

OR

2. We need to automate the Internet Security Settings in client machine.

Could some one help me in this please?

Thanks
Nanda

Re: Is there any way to avoid activex in javascript ?

_Maxxx_3-Nov-13 18:34

_Maxxx_

3-Nov-13 18:34

If above ie. 6 you should be able to parse XML documents directly from Javascript - see here for example[^]

Accessing a file from the local machine, though, is more of a problem unless the user selects the file. Could you supply the file vie a web service, for example?

MVVM # - I did it My Way
___________________________________________
Man, you're a god. - walterhevedeich 26/05/2011

.\\axxx
(That's an 'M')

need help to code in java to read a text file...i am beginner in java..pls help me

creativesmart8825-Oct-13 10:46

creativesmart88

25-Oct-13 10:46

i need a code in java to read a text file and trace line by line of that text file and extract line by line.
code must be able to read the specific line of text file.

Re: need help to code in java to read a text file...i am beginner in java..pls help me

Richard MacCutchan25-Oct-13 23:06

Richard MacCutchan

25-Oct-13 23:06

This is the Javscript forum, are you sure you mean Java? If so then see this tutorial[^].

Veni, vidi, abiit domum

Re: need help to code in java to read a text file...i am beginner in java..pls help me

Richard MacCutchan27-Oct-13 23:52

Richard MacCutchan

27-Oct-13 23:52

creativesmart88 wrote:

Message from creativesmart88 <younustalha786@gmail.com>:

hi Mr.richard.

thanks for ur response.

i have some doubts in java programming.

1. i want to install java compiler in which i want to write code and execute. can u please send me a download link.

2. i want ur help to read and write a text file in java.can u guide me.

3. i want ur help to write a code to trace ip addresses from source to destination from a text file.

4. i also need to write a code to find the Autonomous system numbers from ip addresses of a text file.

waiting for ur reply.

regards.

1. Google can easily find you the home page for Java, or go from the link I already gave you.
2. I gave you a link to the tutorial for reading files.
3. You are expected to do your own coding.
4. see 3.

And, more importantly, please use the correct forum[^].

Veni, vidi, abiit domum

Re: need help to code in java to read a text file...i am beginner in java..pls help me

thatraja28-Oct-13 1:08

thatraja

28-Oct-13 1:08

Oh, you got mail from OP? Big Grin | :-D

Richard MacCutchan wrote:
And, more importantly, please use the correct forum[^] & use forum(instead of sending mail to people).

FTFY

thatraja

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retaining jquery datepicker data between views in ASP:MultiView

Brad7323-Oct-13 6:54

Brad73

23-Oct-13 6:54

Let me preface this question with the fact that I am fairly inexperienced with jquery. Now to the issue, I have 3 date pickers that are placed upon two different views in an ASP:MultiView. They are working perfectly, no issues at all.

I need to retain the values entered in two of the inputs which I can do to one or the other but not both for some reason. each of these reside on a different view so I am not sure if that is the issue or not. In the code below, the data will be retained for the first if statement only. If I switch the if statements then the opposite input will retain its value but never both items. What am I doing wrong? Each if statement pertains to a different control so it is not supposed to be an if else type of scenario. It is like only one if statement is allowed to fire and I have been staring at this for a while with no idea what is happening so any help would be great.

JavaScript

<script type="text/javascript" >

       $(function () {
           $("#txtDoB").datepicker({ changeMonth: true, changeYear: true, yearRange: '-125:+0' });
           $("#txtSpouseDoH").datepicker({ changeMonth: true, changeYear: true, yearRange: '-75:+0', altField: '[id$=hfSpDoH]' });
           $("#txtHiredate").datepicker({ changeMonth: true, changeYear: true, yearRange: '-75:+0', altField: '[id$=hfHireDate]' });

           if ($("[id$=hfHireDate]").attr("Value").length > 0) {
               $("[id$=txtHiredate]").datepicker("setDate", new Date($("[id$=hfHireDate]").attr("Value")));
           }
           if ($("[id$=hfSpDoH]").attr("Value").length > 0) {
               $("[id$=txtSpouseDoH]").datepicker("setDate", new Date($("[id$=hfSpDoH]").attr("Value")));
           }
       });

   </script>

Want pop or new wtndow

abmanish7123-Oct-13 6:35

abmanish71

23-Oct-13 6:35

Hi
I am new user of java scipt. I need some help to validate the below script. My Concept behind is if any select the date more than previous date then either a new html page display that reports available till previous date or a alert message that "Reports available till previous date".

Request all to Please solve the issue and reply on my mail id

My mail is abmanish71@gmail.com

Below is the code

<html xmlns="http://www.w3.org/1999/xhtml">

<head>
<title>Daily Abandon Report</title>

<script type="text/javascript">
document.oncontextmenu = function ()
{
//alert('- All rights reserved -\bpmi©ezeego1.com');
alert('- Contact - Manish');
return false;
}
</script>



<style type="text/css">
.menutitle{
cursor:pointer;
margin-bottom: 5px;
background-color:#00FFCC;
color:#000000;
width:140px;
padding:2px;
text-align:center;
font-weight:bold;
/*/*/border:0px solid #FFFFFF;/* */
}

.submenu{
margin-bottom: 0.5em;
}
</style>

<script type="text/javascript">

var persistmenu="yes"
var persisttype="sitewide" //enter "sitewide" for menu to persist across site, "local" for this page only

if (document.getElementById){
document.write('<style type="text/css">\n')
document.write('.submenu{display: none;}\n')
document.write('</style>\n')
}

function SwitchMenu(obj){
if(document.getElementById){
var el = document.getElementById(obj);
var ar = document.getElementById("masterdiv").getElementsByTagName("span");
if(el.style.display != "block"){
for (var i=0; i<ar.length; i++){
if (ar[i].className=="submenu")
ar[i].style.display = "none";
}
el.style.display = "block";
}else{
el.style.display = "none";
}
}
}

function get_cookie(Name) {
var search = Name + "="
var returnvalue = "";
if (document.cookie.length > 0) {
offset = document.cookie.indexOf(search)
if (offset != -1) {
offset += search.length
end = document.cookie.indexOf(";", offset);
if (end == -1) end = document.cookie.length;
returnvalue=unescape(document.cookie.substring(offset, end))
}
}
return returnvalue;
}

function onloadfunction(){
if (persistmenu=="yes"){
var cookiename=(persisttype=="sitewide")? "switchmenu" : window.location.pathname
var cookievalue=get_cookie(cookiename)
if (cookievalue!="")
document.getElementById(cookievalue).style.display="block"
}
}

function savemenustate(){
var inc=1, blockid=""
while (document.getElementById("sub"+inc)){
if (document.getElementById("sub"+inc).style.display=="block"){
blockid="sub"+inc
break
}
inc++
}
var cookiename=(persisttype=="sitewide")? "switchmenu" : window.location.pathname
var cookievalue=(persisttype=="sitewide")? blockid+";path=/" : blockid
document.cookie=cookiename+"="+cookievalue
}

if (window.addEventListener)
window.addEventListener("load", onloadfunction, false)
else if (window.attachEvent)
window.attachEvent("onload", onloadfunction)
else if (document.getElementById)
window.onload=onloadfunction

if (persistmenu=="yes" && document.getElementById)
window.onunload=savemenustate

</script>



</head>

<body ondragstart="return false" onselectstart="return false" style="background-color: #00FFCC">

<p align="center"><font size="5"><b><MARQUEE style="width: 509px" behavior="alternate" bgcolor="#C0C0C0" width="768" height="27">Daily Abandon Report</MARQUEE></b></font></p>

<form name="doublecombo">

<p class="style1">                           
<select name="example" size="1" onChange="redirect(this.options.selectedIndex)">

<option>SELECT</option>
<option>Jan-13</option>
<option>Feb-13</option>
<option>Mar-13</option>
<option>Apr-13</option>
<option>May-13</option>
<option>Jun-13</option>
<option>Jul-13</option>
<option>Aug-13</option>
<option>Sep-13</option>
<option>Oct-13</option>
<option>Nov-13</option>
<option>Dec-13</option>
<option>Jan-14</option>
<option>Feb-14</option>
<option>Mar-14</option>
<option>Apr-14</option>
<option>May-14</option>
<option>Jun-14</option>
<option>Jul-14</option>
<option>Aug-14</option>
<option>Sep-14</option>
<option>Oct-14</option>
<option>Nov-14</option>
<option>Dec-14</option>

</select>
<select name="stage2" size="1">
<option value="SELECT">SELECT</option>

</select>
<input type="button" name="test" value="Go!"
onClick="go()">
</p>

<script>

</script>

</form>

<p align="center">
<a href="mailto:abmanish71@gmail.com?subject=Mail"><font face="arial, helvetica" size="6">Contact Us</font></a></p>

</body>

</html>

Thanks & Regards

Manish Kumar
Email : abmanish71@gmail.com

Re: Want pop or new wtndow

ZurdoDev29-Oct-13 9:12

ZurdoDev

29-Oct-13 9:12

1. Please don't post your email unless you like SPAM.
2. This is way too much code to look through.
3. Please narrow down your question.

There are only 10 types of people in the world, those who understand binary and those who don't.

Re: Want pop or new wtndow

Sunasara Imdadhusen21-May-14 23:52

Sunasara Imdadhusen

21-May-14 23:52

What is this??

Angular/Backbone/Knockout Security Question

AnalogNerd22-Oct-13 3:17

AnalogNerd

22-Oct-13 3:17

I am missing something with these frameworks. They seem pretty cool for some things, but how do you secure the REST service?

With these frameworks you have the URLs for your REST service sitting in JavaScript code on the client, in theory anyone could check the URL for your call to, say, change your password.

How do you secure the service so that I can't check the URL and just try to call the REST service directly and affect other users?

A GUID user ID that is passed in might help, but is this the best/only method for securing your REST service from a client?

using document.forms["MbrForm"].submit(); does not work - help!

Member 860517720-Oct-13 4:53

Member 8605177

20-Oct-13 4:53

I have a form that I need to have two means of submitting the form. The first way is with the standard submit button. This works just fine. I also need to submit the form after the htm page has been printed using a button that calls a "printpage" function. This function prints the page, displays an alert and then is supposed to submit the form. It does everything except for submit the form. Any help figuring out why is appreciated.
The code for the htm page is shown below.

HTML

<!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">
<head>
<title>Membership Application</title>
</head>
<body>
<script type="text/javascript"> 
function validatezipfield(sZip) {
//removed for brevity
}
 
function validatephonenumber(sNum) {
//removed for brevity
}
 
function validateEMail(sEmail)
 {
//removed for brevity
 }
 
  
function IEVersion()
{
//removed for brevity
}
 
function printpage()
{
	if (MbrForm_Validator(document.forms["MbrForm"]))
	{
		ie = IEVersion();
		if (parseInt(ie.Version) == 8 && ie.BrowserMode != "Compat Mode")
		{
			alert("You appear to be using Internet Explorer Version 8 in a mode that will prevent the printed version of this page from having " +
				  "the radio buttons and check boxes filled in per your choices. So, please be sure to manually mark the form before you mail it.")
		}
		window.print();
		alert("Thank you for your support of the Friends. Please mail your form and check to the address shown on the printed		 page.");
//***********************************************************************************
//***********************************************************************************
//this is the line of code that does not work for me		
		document.forms["MbrForm"].submit();
//***********************************************************************************
//***********************************************************************************
	}
}
 
function valButton(btn)
{
//removed for brevity
}
 
 
 
function MbrForm_Validator(theform)
{
//removed for brevity
}
</script>
		<h1>Membership Application</h1>
		<p style="margin:0px;text-size:9px;"><sup class="required">*</sup>Denotes required information</p>
		<form id="MbrForm" name="MbrForm" method="post" action="membertest.php" onsubmit="return MbrForm_Validator(this)" target="_blank">
<p>the contents of the form itself have been removed for brevity. Only the SUBMIT and PRINT buttons remain</p>
			<p>  </p>
			<table width="75%" border="0" align="center" cellspacing="5" class="displayonly">
				<caption style="border-bottom:black solid 1px;">
					How Would You Like to Pay? 
				</caption>
				<tr>
					<td width="49%" valign="top">
						With a check<br />
						Click the "Print" button below to print this form for mailing in with your check.
					</td>
					<td width="51%" valign="top">
						On-Line with a Credit Card<br />
						Click the "Submit" button below to submit your information and pay using a credit card or PayPal.
					</td>
				</tr>
				<tr>
					<td>
						<div align="left">
							<input type="button" name="btnprint" id="btnprint" value="Print" onclick="printpage()" />
						</div>
					</td>
					<td>
						<div align="left">
							<input type="submit" name="submit" id="submit" value="Submit" />
						</div>
					</td>
				</tr>
			</table>
			
		</form>
		<div class="printonly">
			<p>
				<br /><br /><br /><br /><br />
				<hr />
				Mail with your check to:<br />
			</p>
		</div>
	</div>


</div>
</body>
</html>

Bob

Doubt in AJAX response obj

Member 1013786815-Oct-13 0:19

Member 10137868

15-Oct-13 0:19

I have a doubt in ajax.My code is

function constructResponse( req , funName)
{
if (req.readyState == 4)
{
if (req.status == 200)
{
var callBackFunction = funName +"(request)";
var newFunction = new Function("request",callBackFunction);
newFunction(req);
}
else
{
alert("There was a problem in retrieving the data:\n" +req.statusText);
}
}
}

I call this function at req.onreadystatechange .My doubt is when else was called.Because most of the time i got the alert msg.How to avoid the alert.

Thx,
Muthu.N

Re: Doubt in AJAX response obj

thatraja15-Oct-13 5:20

thatraja

15-Oct-13 5:20

You didn't share remaining code. onreadystatechange[^] is right one which have you used.

I think the problem occurs somewhere out of this code. What's the value of req object? What did you get from req.statusText? Debug it, you could solve the issue.

Here Callback function[^] example from w3schools, check it out.

thatraja

FREE Code Conversion VB6 ASP VB.NET C# ASP.NET C++ JAVA PHP DELPHI ColdFusion
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Script running multiple times

AnalogNerd10-Oct-13 10:49

AnalogNerd

10-Oct-13 10:49

I have a jQuery script that is listening for keydown on a textbox, like so:

JavaScript

$(document).ready(function () {
       $("#result").on('keypress', function (e) {
           ...
        });
 });

My problem is that I have written this for a site architected and hosted by a 3rd party. This site allows you to move modules around the page if you wish.

When my module is moved (sometimes! not all the the time) it appears as if the page creates more instances of my code. As a result the code in the keydown function fires multiple times.

A few things:
1. I put an alert in the document.ready and can see it pop up multiple times, so I know the page it loading more instances of my javasvript.

2. When looking in the debugger in IE or Firefox I can't find more than one instance of the script, but a breakpoint on the one I can find will be caught only once. Whereas the code does run multiple time. Again and alert in the function can be seen multiple times.

I've tried unbinding events from my textbox before binding, but it doesn't work.

Does anyone have any ideas of how I can prevent my code from being instantiated or triggered multiple times?

Re: Script running multiple times

DaveAuld13-Oct-13 21:38

DaveAuld

13-Oct-13 21:38

You could have a look at what other events are firing when the stuff is moved around. You could then use these to suspend the kepress actions and then re-enable them post move.

Dave
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