Using Javascript, how do I determine if there is a DIV with a particular CSS class name on the page? (Not an ID...) I'm writing a function to perform an action if it finds that DIV on the page.
View 2 RepliesHow do I determine whether a variable exists in a form. I have a form called "theForm". I want to determine whether the variable "THIRD_PARTY" exists in the form and if it has been set.
View 6 Replies View RelatedI'm new to javascript and PHP and I am wondering if there is a method or function to capture a 404 error in the event a particular html file cannot be found. I want to redirect that error to another page or design the code to send me an email telling me what page was selected and not found. In other languages I can trap such an error and respond to it.
View 3 Replies View RelatedI'm working on something that I want a user to be able to override by including a specific class somewhere in the CSS definitions. If that class doesn't exist I want to add a default style. This seems like something that should have come up before but search isn't coming up with anything. Can someone point me in the right direction? Local styles/classes override global classes right?[code]...
View 24 Replies View RelatedI am working on a registration page.I did all the validation but facing problem during username validation.when a user enter email id in the textbox,it first check whether it is present in database or not.. if not present "register successfully" otherwise "email exists"
[Code]...
My code: [URL]... When I click on Upraviť in class edit I need add some HTML code to begin and to end of class entry how to I can select class entry in the same class post on which I clicked?
View 1 Replies View Related<INPUT id = "bot1" TYPE="button" name="text1" value="" size="40" onClick="location.href= valore12" >
the onclick is opening a file. How can I tell javascript a message has to be seen if if there is not that file in the specified directory...
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 "http://www.daniweb.cam" rather entering "http://www.daniweb.com", how do i intimate them that the entered url is not valid.?
View 1 Replies View RelatedUsing 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
[Code]...
I'm trying the figure out how to check if a id exists.
I have tried this;
if(document.getElementById("theID")
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.
I have the following script that auto-submits a form at intervals.
setTimeout("document.forms['pageReloader'].submit();",90000);
Unfortunately, sometimes the target webpage is not available and I get
"page not found". That immediately kills my application, until I manually
restart it.
Is there a way in javascript to first check if a link exists before the
form is submitted?
For php programmers, an example of what I want will be:
if(fopen("http://www.example.com/", "r") {
do something here...
}
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.
How do I check if an object exists in Javascript?
EG:
if (document.getElementById("product").value == null)
{
prodValue = "";
}
else
{
prodValue = document.getElementById("product").value;
}
This gives me an 'object required' error...
I am trying to write a script that will search the page for a certain ID...if said ID exists, then I want to hide a few other IDs.[code]
View 4 Replies View RelatedI want toa script to run unlessa div with an ID of #error-box exists.
This is the script...
<script>
RecoverScroll.hash();
RecoverScroll.start('personal-details');
</script>
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.
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?
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.
If I have a form like so:
<form>
<input type="text" />
</form>
[code]....
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">
<div>
<strong>Keyword: </strong> <input type="input" id="tag" name="tag"/> <input type="button" id="send"
[code]....
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:
Code:
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?
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 RelatedIn client side, we can check if some image exists using onerror. I wish the same behavior to check files used in object tag (in client cache, not in file system), like swf, wmv and wma, etc.
View 1 Replies View RelatedI have a form, that depending on some conditions MAY have a certain drop down box in it.
I would like to have a javascript function that checks to see IF the drop down box exists? ie: Does the javascript object exist?
Sort of like this:
function resetMenu1(){
//Test to see if dropdown exists.
if exist(document.menu.file.value) {
document.menu.file.value = "Yes!";
} else {
alert("Box does not exist.")
}
}
Anyone know how to do this? It's the "if exist" part I don't know how to do.
I'm using this script to make some changes to a table which is only accessible via a class serverside:
Code:
The first part of the code is a script from Robert Nyman, [url] - my function is added at the end of the script. It works fine, but my page is dynamically generated and sometimes this element with the class name doesn't exist. This gives an error when the page is loaded: "getElementsByClassName("login-headline", "table")[0] is undefined". How can my function be rewritten so that it checks to see if the class is avaliable before running the script?
I would like to check if a function exists before define it. Does this make sense:
Code:
<script language="JavaScript">
if (typeof this.window['foo'] != 'function') {
[code]....