So for whatever reason the convertToArray function in the following code returns false if the argument is more than 1 character long. If it's 1 character long it just returns the character as an array with only one value.What I'm trying to do is take a string of numbers, plus signs, and minus signs and convert it to an array.
I am trying to write a function that is being invoked when some one clicks the submit button on the form.<form name="sectionA" action="optionpage.cfm" onSubmit="return abc()">I have three tables with initials textboxes. I want to check if they are empty and return false(stay on the same page), else go to action page.Here is what I am doing, I Created three functions tableA(), tableB(),tableC() call them from function abc(). These functions tableA(), tableB(), tableC() return false if one of the field is empty and stop furthur processing and remain in the same page. If none(errors), then go the other page.i.e if table B has empty fields, page should stop furthur processing and remain in the same page.Here is how I am doing it Can somebody please point out what I am doing wrong here.Even when there is empty field, the code moves me to the actionPage.
I am wondering about what seems to be a particular quirk in Javascript that does not allow form event listeners (e.g. "onsubmit=...") to work properly. In the code below, I would like to set up a function (doOnSubmit) that is called when the form is submitted.
But there is a "return false;" in the "onclick" of the button. If this "return false" is removed, the code works as I would hope it would. With it there, doOnSubmit is never called. Code:
On this page I'm given the impression that stopPropagation is a lot like returning false:
http://www.brainjar.com/dhtml/events/default3.asp
"preventDefault() Can be used to cancel the event, if it is cancelable. This prevents the browser from performing any default action for the event, such as loading a URL when a hypertext link is clicked. Note that the event will continue propagating along the normal event flow.preventDefault() Can be used to cancel the event, if it is cancelable. This prevents the browser from performing any default action for the event, such as loading a URL when a hypertext link is clicked. Note that the event will continue propagating along the normal event flow."
But often, if I want to stop a hyperlink from working normally, I can simply return false from whatever action I've attached to that hyperlink. Suppose I have this link:
<a id="link1" href="index.htm">link text</a>
Suppose I attach the function "alertDanger" to this link:
function alertDanger() { alert("Danger!"); return false; }
Because I return false, the default behavior doesn't occur. Would there ever be a benefit to doing this instead:
function alertDanger() { alert("Danger!"); preventDefault(); }
Perhaps preventDefault is only for those occassions when the code can not or should not return?
I am building a page with a member login system on the home page. I right now have it so that if the user does not enter a password or username it will change a div to block style and show the error at the top of the page. Is it possible to after 5000 msec after returning false to the form, to hide the div again?
User Does Not Enter Username/Pass Submit Button Pressed Error Div Is Shown Form Results False 5000msec Wait Error Div Is Hidden
I have been trying for a while, but I either have it disappear and the form takes 5 seconds to get its result, or the form returns false and the div does not disappear.
I have a simple example below showing how when I pass in the value of the value attribute of option node, and then use if operator to check whether parameter is a string or not, even though it's a string, it converts it to false boolean and triggers the else statement rather than calling a function.callback should be a string so why is it saying otherwise?
my webstie allows users to change the color of the background, so to keep the text readable I have it changing as well.the color picker I am using has text boxes with rgb values 0-255 for each.I am trying to get one bit of text to alternate between red and blue with the conditions
Have an issue with using $.ajax for requests. If I set async: false it works fine, but sometimes gets cached content. If I add in cache: false then async doesn't work anymore, the next ajax request gets called before the first one finishes.
if i group some javascript into a function that returns false; how could i carry that 'false' out of the function so it can be used outside the function.the example below shows the validate function checks for a condition then returns false if it is met. i want this false to then be passed out of the function to then throw an error in its containing function. (goal to prevent the submitting of a form)i dont want the proceed function to be called, so how can the other function prevent this.Now i realise that the validate function could be incorporated into the top level function but, my form will eventually be quite large with a multiplitude of fields so i need to know how i can call back to functions and use them as objects insteasd of repeating lots of code.
The following code is supposed to return a variable containing text, currently the code posts the data but returns an "undefined" variable. Can someone tell me what's wrong? code...
I have a little problem in one of my functions, I would like to pass in a form field name and set the value to something that is passed in. here is my code:
function pickitem(id,type){ opener.document.getElementById("form").type.value = id; window.close() }
so i'm passing in an id and a formfield e.g. txtName The problem is with the type.value - i haven't touched javascript for ages so i'm really rusty!!
I'm attempting to simplify my javascript code when it comes to ajax, but afterwords it only prints 'undefined' to the screen rather than what I want it to print.
I want to be able to put something like this on my main page onclick="document.getElementById('output').innerHTML = print_output();" where print_output() is the ajax function. This way I don't have to use a function to assign values directly to innerHTML and I don't have to muck about with a js file whenever I want to change my page layout.
To do this, I created a recursive function:
function print_output(return_value) {
if a value has been passed to the function, simply return it if(return_value || return_value == 0) { return return_value; }
[Code].....
but like I said, it prints 'undefined' out to the screen. Why isn't this printing the contents that it receives from 'index.php' like it's supposed to?
The code is below but basically I have two global variables, then I have a function and then a function within that, I am simply trying to update these global variables from within the nested function so i can then go on and use them in another function! this sounds like quite a straight forward request to me, but maybe it can not be done? When I do an alert on the variables (after I have apparently updated their values) I get 'undefined'!
Code JavaScript: var resultLatB; var resultLngB; function getLatLngFromTown(town, callbackFunction) { var localSearchB = new GlocalSearch(); localSearchB.setSearchCompleteCallback(null, function() { if (localSearchB.results[0]){ resultLatB = localSearchB.results[0].lat; resultLngB = localSearchB.results[0].lng; pointA = resultLatB; pointB = resultLngB;
Now if I remove the ".getElementsByTagName('a')" it will actually work, but it also includes the <a> tag thats within the <li> tag, which I don't want. document.getElementById('title').innerHTML=pname.innerHTML; </script>
Im creating a task loggin system and this allows the user to raise tasks and update them, im using javascript for validation and if the fields are empty it then changes the fields back ground to Red which is fine but then it goes on to update the data in SQL which i dont want, any suggestions or how i can achieve no post back is the result from the function is False (for fields in error)Html Code where im calling the function
I have several functions with code along the lines of:
var xmlDoc = requestXML("ajax.asp?SP=SelectRelatedTags&tag=" + array[i]);
The requestXML() function includes the code:
var xmlDoc = null; http_request.onreadystatechange = function() { if (http_request.readyState == 4) { if (http_request.status == 200) { xmlDoc = http_request.responseXML; } else { alert('There was a problem with the request.' + http_request.status); }}}; http_request.open('GET', url, true); http_request.send(null); return xmlDoc;
However, the last line (the return) executes before the readyState reaches 4. How do I return the xmlDoc to the functions only once the xmlDoc has been assigned? I tried putting the return statement in a while loop with the condition that the readyState must = 4 - this worked, but makes the browser popup a message saying the script is slowing down the system.
I know this is a simple question with a simple answer, but I can't seem to wrap my brain around it.Sorry for the infantile nature of this post. Anyhow, I am making an AJAX call via JQuery and need the function to return a value from a calling function, like so:
I have a weird bug that's occuring in pretty much all the browsers. If I close the tab, and then hit Ctrl -> Shift -> T to bring it back the width() method returns 0 on an appended image instead of what the image actually is. Hitting refresh on the tab removes this bug and everything works fine. I will also say that trying .css('width') and document.getElementById('divShadowLeft'); Both also return 0 for this bug.
I can't show all the code for security reasons, but I'll just outright ask.. what are the reasons that width() would return 0 on an image? I've checked to make sure that it was visible (both display and visibility properties), and I checked the length of the property to ensure it was there. I just can't figure out why width() is returning 0.
I have a setup where I have a function, calling a function, calling a function. All functions do what they're supposed to do, but they don't return to the first function when all is done, so it doesn't display an alert that it's supposed to.
For those that don't want to look through tons of code and think they might know what I'm doing wrong, here's the "coles notes" version. code...
I am wondering how can I return the variable senttext from the function below?I have declared it and when I alert(senttext) below it appears as I want it but I need to return it and pass it to another function. When I change alert() to return the variable becomes undefined?
var senttext; function getData() { if (window.XMLHttpRequest) {
I have a function where in I call another function that assigns a value to a var. code...
For some reason my code below is returning 'undefined'. But when I place an alert(); before the 'return' it shows the correct value. However when I place an alert(); to show the var that is set to what the function returns it says 'undefined'.
Firebug throws no errors. I am using a little bit of jQuery.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html>
[code]....
The practical scenario is I have several functions attached to the jQuery ajaxSucess event. Each function needs to execute once during initial load and after when the JQuery ajaxSuccess event is fired. So I am just looking to see if I can eliminate a a few lines of code and learn something new in the process, that is really all.