Check If Item Exists In Array?

Oct 21, 2010

I have declared a javascript array:

var strUsersName = new Array("John","Mac","George");

I want to check, if the particular loggedin user for example Mac is available in the array list declared.How to check in a efficient way, if the particular user loggedin is available within the array declared.I tried this, but I am not sure, if it is correct:

var strUsersName = new Array("John","Mac","George");
var L=strUsersName.length;


View 1 Replies


Check Whether A Specific UserID Exists In The Array?

Mar 15, 2011

have an array of objects which is gAllMedicalFilesClaimantsArray which has 2 properties (UserID & UserInfo).

For example:
gAllMedicalFilesClaimantsArray[0].UserID = 111;
gAllMedicalFilesClaimantsArray[0].UserInfo = "AAA-123";
gAllMedicalFilesClaimantsArray[1].UserID = 222;
gAllMedicalFilesClaimantsArray[1].UserInfo = "BBB-333";

What is the fastest way to check whether a specific UserID exists in the array using Jquery or Javascript because gAllMedicalFilesClaimantsArray has got 8000 records?

View 1 Replies View Related

Check If Form Field Exists And If It's An Array

Sep 5, 2007

I want to validate a form. In the form is a text field named 'extra[]' where the user inputs a number. The number is what I want to validate.

However, the 'extra[]' field is dynamic and does not always appear in the form.

If it appears, there may be only 1 occurrence of it which means it's then not an array but there may also be multiple occurrences of it.

I have a script that validates (and work as it should) if the 'extra[]' field occurs multiple times and is thereby an array, but I can't figure out how to validate the 'extra[]' if there is only 1 and to not throw an error if it's not there at all. Code:

View 3 Replies View Related

How To Check If URL Exists

Aug 4, 2011

I have a textbox for entering URL. I validate that URL using regular expression. Now the problem is, How do i know whether the entered URL is exist or not.?For example, if user enter "" rather entering "", how do i intimate them that the entered url is not valid.?

View 1 Replies View Related

Check If A URL Actually Exists?

Feb 6, 2009

Using Javascript I need to figure out how to check if a URL actually exists. The problem is that the Javascript file may not always be there so I have I have to check every time I need it.

AJAX is not an option AND its has to cross browser compatible.

*NOTE The URL will always be pointing to a Javascript File


View 3 Replies View Related

Check If An Id Exists?

Sep 21, 2010

I'm trying the figure out how to check if a id exists.

I have tried this;


Then do this

But that doesn't seem to work.

All I want to do is if it doesn't exist then don't run the function.

View 5 Replies View Related

Check If Function Exists

Oct 19, 2005

How can I check if a function exists in any of the scripts on my page?
I prefer if it can work for both Javascript & VBScript.

View 11 Replies View Related

Check If Object Exists?

Apr 13, 2006

How do I check if an object exists in Javascript?


if (document.getElementById("product").value == null)
prodValue = "";
prodValue = document.getElementById("product").value;

This gives me an 'object required' error...

View 9 Replies View Related

Check Css Property Exists With JS?

Jul 2, 2011

I'm using ccs3PIE with my site. What I want to do is check if a DOM element has a css property like border-radius and then add a class to it.

The problem I'm having is that I don't know how to check for the css property. I've been searching for it for a couple of hours now and I can't find anything that seems to work.

View 2 Replies View Related

Check If A Select Value Exists?

Aug 31, 2009

I found out how you can check if an array value exists but I can't seem to get it to work with the options array for some reason.

how I can find out if a certain select value exists?

View 8 Replies View Related

Check If Plug-in Exists

Sep 7, 2009

I'm not entirely sure this is possible. I hope it is, and it doesn't seem to far-fetched or impossible.

With JS, how would one go about checking if a user has DivX Web Player installed?

Usually people put in code within the embed, so if it the player doesn't load, it would have the message behind stating the fact. However I haven't seen this used at all with DivX, instead, you see pop-up boxes, whether installed or not, stating "Don't have DivX Web Player? Get it here for windows or mac"

I find this extremely annoying, and would never want such informalities on my website.

View 5 Replies View Related

Check If An Element Exists?

Mar 30, 2010

If I have a form like so:

<input type="text" />


View 11 Replies View Related

Check If INPUT Value Exists?

Nov 26, 2010

One holds the form and the other the php Query process.Im using a small piece of javascript to POST the value to my php Query process scriptbut im finding it difficult to display a result by fading in a div based on the query response.For example if i type in a tag and the tag already exists i want the php to check the table and the return a faeIN div to say it "already exists" otherwise fadeIN a div to say "Tag inserted into database"But i also am using a little more JS to clear the input field value as well.All this is done without reloading the page.So basically if the tag "People" exists in the MYSQL table then i want the div #i2 to fade in and say "Already exists!"My code is below:The HTML

<form method="post">
<strong>Keyword: </strong> <input type="input" id="tag" name="tag"/> <input type="button" id="send"


View 9 Replies View Related

Check 'getElementById' ID Exists First?

Dec 17, 2005

In my page templates, which are included on every page, I have some javascript that is necessary to create some effects. However a couple of pages do not require the javascript, and because of this the page elements are not present. How would I add a check to ensure the element ID exists before running the javascript code? In other words, here's the code in question:

var thevar = document.getElementById("theid").getElementsByTagName("LI");
Is there a conditional that can be wrapped around that to prevent the javascript code from running if no elements named "theid" exist?

View 2 Replies View Related

Check If File Exists

Jan 29, 2006

I am having troubles finding a way to use JavaScript to see if a file exists before an ASP file upload script runs. Is there an Exists check for JavaScript? I thought I found an ObjectName.Exists but doing this did not work.

View 6 Replies View Related

Check If A Function Exists?

Mar 5, 2010

I would like to check if a function exists before define it. Does this make sense:

<script language="JavaScript">
if (typeof this.window['foo'] != 'function') {


View 1 Replies View Related

Check If Textarea Or Textfirld Exists

Jul 20, 2005

is there any way to check if any textarea or textfield exists in current
function checkifexist(){
if any textarea or textfield exist return true
else return false


View 2 Replies View Related

JQuery :: Check If Username Exists In Db?

Mar 15, 2010

I have a jquery dialog with a registration form in it. My problem is: I want to check if the username (input) already exists in the database, if so I want to return a error.

I know I have to use AJAX... but how?

Explanation of my form:

(this is a dialog)
My form:
Username: testuser ERROR: username already exists


View 1 Replies View Related

JQuery :: Check Whether A Word Exists In A URL?

May 14, 2011

Let me explain the issue which I'm facing with an example.My URL is http://localhost/~gaurav/dstreetmantra/register.php.One of the anchor tags in my navigation bar is <a href="register.php">Register</a>.The code needs to be able to check whether the value in this very anchor tag's href attribute is present in the URL.If it is present, the word 'Register' register would be highlighted. If not, some other link would be highlighted.As I said, I'm doing this for the navigation bar. This way, it'll check which of the links' 'href' value is present in the URL, and thus highlight that link.I'm assuming this can be done using Regex, but I do not know how to use it.

View 4 Replies View Related

Check If An XML Tag Exists Before Using To Write To HTML?

Nov 9, 2009

I'm making a table that is dynamically populated from XML data. One of the columns refers to an XML tag that is NOT required (hence the tag does not exist in every XML entry). How do I write a statement (if, else, or any other?) that says - check for the tag, if the tag exists, write the tag's data, if the tag does NOT exist, write "n/a".Here's the code:

<script type="text/javascript">
if (window.XMLHttpRequest)


View 1 Replies View Related

Check If IE Window Exists With A Specific URL?

Sep 12, 2011

Can I detect if 1 or more sessions of a website are open?

for example, if a session with port 7005 is open like this one below, then I want to assign the next port to this user in the second window of browser

the next IE window should appear like this:


View 2 Replies View Related

Check If File Exists On Server

Oct 11, 2006

I am trying to find a way to search to see if there is a specific file located in the current directory on the server. If a folder contains file1.txt or file2.txt and depending on which file is in that folder change a certain javascript variable. What it comes down to is, is there a way to search for specific files on the server and limit that to the current directory/folder.

View 12 Replies View Related

Create A Cookie And Check Whether It Exists?

Sep 14, 2011

I have created a popup at the following page:

If i click on 18+ then it gets redirected to

if i click on i am not 18 then it gets redirected to

if i have chosen 18+ then the cookie should be created and if by mistake i again go to that is popup page it should get redirected to

View 1 Replies View Related

Check Is Querystring Variable Exists

Oct 12, 2010

I would like to check the querystring to see if a variable exists.If groupid exists in the querystring and has ANY value then show a hidden div (#closedMsg). I do not care what the value of the groupid is I just want to verify that it has a value.If the url looks like this "" with no value for groupid, I do not want to show the hidden div.

View 2 Replies View Related

Check File Exists Before Linking....

Jan 6, 2003

Is there a way of checking a file exists before linking to it?

I sell didjeridoos and handdrums.
I was hoping to create small html program for each drum, somthing like this....

thisdrum=new Image()
thisdrum src=drum001.gif
<script src=createpage.js>

and saved as drum000 to drum999

Now I need a function included in the creatpage.js, that checks if a file exists,(eg drum000.html) if it does, go there, if it doesn't, try drum001.html

any suggestions on how I could go about it?

View 11 Replies View Related

Check If (dynamically Created) Div Exists?

Aug 12, 2011

I create a div dynamically and set an ID attribute, e.g. myDiv.setAttribute('id',id_name); I am using these dynamic div to create layers (like popups) within my html. Each div has it's own iframe that loads a webpage within it.Sometimes I need to pass on variable from one div to another.In order to check if a div exists i do the following:

PHP Code:
if (document.getElementById('my_div')) 


View 2 Replies View Related

Copyrights 2005-15, All rights reserved