Functions - Passing In Parameters And Then Calling The Function With The Values To Maybe Add Something Together
Jul 27, 2011
I totally understand that in order to learn javascript I need to know how functions work, I understand the basics of passing in parameters and then calling the function with the values to maybe add something together etc I ve read countless articles about functions as well as books etc but I just dont get how they are used and when they should be used etc, the more advanced functions that have maybe 4 parameters and are doing different calculations and returning various values that get fired back into the script just totally confuses me.
What I would like to know is first of all how can I overcome this confusion and also any words of wisdom you may have. I will also add that I have no prior programming experience and have spent the last 2 months frequently hitting my head off a brick wall as I just cant understand javascript.
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Jun 10, 2011
Say I have the following code:
And I want this code to print 21.
How should I implement the function Curry?
I tried intuitively:
But it didn't work.
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Apr 15, 2009
I have a following JS code and have two similar onclick event handler functions as below. The two onclick events happen two different section elements. if there is a way to use only onclick event handler for both sections.
Code:
if(document.getElementById('featuredmedia'))
{
var fmElements = document.getElementById('featuredmedia').getElementsByTagName('li');
[Code]....
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Dec 19, 2010
Recently I decided to branch out and learn some Javascript on my own. I'm getting the following error: Uncaught ReferenceError: array is not defined
I don't quite understand why I'm getting this error, as I've created the array in the function showPrompt and it seems as though it's being passed around correctly. However, I believe the problem is with generateBoxes, specifically this part here:
onclick=\"getValue(array, i)\"
(line 39)
Removing array from the function parameter seems to make it execute, but beyond that, i'm lost to what is wrong.
Here's the code:
function showPrompt () {
Obtains user input
var array = new Array();
var box = prompt("Please enter number of boxes","1");
[Code].....
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Mar 13, 2006
Code:
<script language="javascript" type="text/javascript">
function open_win2(var)
{
window.open("link.php?variable=var","Page","toolbar=no, location=yes, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no, width=545, height=600")
}
</script> .....
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Aug 12, 2010
I'm trying to trap a user entry that cannot be found in the database. When a code is entered, the page should give a "Code Not Found" message if it is an undefined value.
However, it didn't; and it always shows the "undefined" value to the page instead.
Here's what I actually did:
getting user input:
Finding the code:
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Jul 5, 2006
Problem: I have two functions that send an AJAX call via an attached .js file (engine.js) and then deal with the response. My problem is this, the function can be called by any number of different triggers and needs to pass the data to a different element depending on which one calls it. These different triggers are produced via a repeating region created by Coldfusion. Each element that can get acted upon by "updateImgCount_response" is named "imgCount[recordID]" where "recordID" is a value inserted by coldfusion. This way each Element has a unique ID. Now I just need to know how to tack the "recordID" value returned as part of "obj" onto the 'imgCount' in document.getElementById() the updateImgCount_response function. Code:
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Jul 10, 2007
I was reading through a book that talked about unobtrusive javascript, and it gave this example of how to trigger a function instead of using an inline onmouseover event handler.
document.getElementById("RandomElementId").onmouseover=RandomFunction;
I thought this would be cool, but I can't seem to find a way to pass parameters to the function this way. I assumed you just use RandomFunction(parameter1,parameter2); but no go.
Is there a different syntax for this, or does this technique forbid using parameters?
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Jan 30, 2009
function refreshWindow ()
{
if (xmlHTTP)
xmlHTTP = null;
[Code].....
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Mar 11, 2010
I'm trying to pass parameters using the jquery's ajax function, but I end up with a "function undefined" error message when I try.
I had trouble finding simple examples of ajax passing parameters with jquery.
<!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>
[Code].....
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Jul 21, 2009
This is probably more of a basic javascript question than a specificjquery function.I have this jQuery function named validateSubmit()which calls two other regular javascript functions. When using IE,both createCharts() and getDirectorIDs get called but when usingFireFox, only createCharts() gets called and never makes it togetDirectorIDs() and I'm not sure why this occurs.
<script type="text/javascript">
// make sure at least one checkbox is checked
function validateSubmit() {
[code]....
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Jul 20, 2010
I'm trying to build a t-shirt creator application w/ php and ajax.You can see where I'm at here.Thus far, I've successfully passed the first parameter from the form via a function called from an onchange event, which uses a php script to pass simple text (for the time being, 'til i get this figured out), which you can see working on the page.trying to update the output w/ each change they make via the form. For every step, the output on the right needs to update.Should I be calling the same function for each onchange, or different functions? Here's what I'm using as far as AJAX/form goes:
Code:
function showShirt(s) {
// CHECKS IF THE STRING IS EMPTY
if (s=="") {[code]...........
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Oct 3, 2011
I can't seem to get the syntax correct to get this to work. I'm sure it is something simple.I want to call multiple functions inside my document.ready function.The first function gets called but not the second.
$(document).ready(
function GetSuspectCollection() {
$.ajax({[code].....
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Aug 31, 2010
I want to pass dynamic array values to java script function.how its possible.
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Sep 30, 2009
I'm passing the variables myTitle and myLink to form.php using javascript.
This is the way I'm doing it:
Code:
<a href='form.php?title=" + myTitle +"&link="+myLink+">Click me</a>
It's working great but sometimes myTitle and myLink contain the plus character (+). When this happens it's not passed. In the case of the title, it's just a problem of looks but in the case of the link, well, the link won't work without the character.
As an example if the title is: Laptop + Accessories What is passed is: Laptop Accessories
What can I do to pass also the plus character??
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Apr 20, 2010
I am working on this simple calculator that passes values from one function to another via paramters. I have used alert() to find what is being recieved, so far nothing. code...
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Jun 27, 2006
There is a frame, the top part of the frame contains a button. On clicking the button, the bottom part of the frame changes colors, which are contained in an array present in the head of the code.
For some reason, this is not working, perhaps something wrong with the way I have assigned the parameters. Code:
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Jul 23, 2005
I have a JavaScript function that receives an Array with words. This
Array can be gotten from a query to a DB using JSP.
The JavaScript function is executed when onFocus event occurs:
<input type='text' onFocus='myFunction(this.event, myArray);' />
myArray is declared as:
<script>
var myArray = new Array('j'habite', 'tu habites', 'il habite');
</script>
I want to tell javascript:
var myArray = myJSPArray;
Where myJSPArray is declared some where in the JSP document.
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May 14, 2009
myfunction(a,b,c)
{
do something;
}
[Code]....
passing 1 variable containing 3 parameters?
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Aug 22, 2000
i need to pass values from one page to the next after clicking next...how do i do this using parameters?
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May 20, 2011
Ok so the following code works.
function myFunction(myName)
{
alert("You are "+myName);
}
callFunction = "myFunction";
parameter = "Joe";
[Code]...
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Jun 7, 2010
I am new to JQuery and trying to post some parameters from an anchor tag. But only my 'site' parameter gets passed. Here is my code :
<a class="screenshot-link" href="#" site='dv2' num='1'>1</a>
$(
".screenshot-link").click(function () {
[code]....
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Dec 1, 2010
I am passing parameters from one page (actually from a frame within a frameset) to another using Javascript. Typically the code is as follows, taking values from a Form.
parent.titleFrame.location="frm_right_demo_title.html?MyDateEvent.value='"+ytt+
"'&MyParam_spec.value='"+parent.mainFrame.document.forms.myForm.MyParam_spec.value+"'";
This has worked fine in all browsers including IE, Chrome and Firefox version 2.0.0.2.
However, I have now found that it doesn't work with Firefox version 3.6.12.
This is because when retrieving the parameters in the new loaded page, the character ' (quote) has been converted to %27 (percent twenty seven).
I can write code to replace %27 with the quote character. However, this is lengthy and time-consuming (as I need to have cyclic code as the javascript replace command seems to work only on the first occurrence within a string).
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Dec 31, 2009
I am trying to grab firstname from the previous form page and pass it into my open window command.
<script type="text/javascript">
{
window.open("https://www.MyWebsite.com/Myform.html?firstname=getQueryStringVariable('firstname')")
}
</script>
The above does not come out properly, I get entire GetQueryString etc in the Target URL
What should the syntax be, I think I may also be using the wrong javascript command, I think it should be a FormRequest, hmm not really sure.
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May 22, 2003
There are basically 4 fields in a form, being Name,Company,Email and Phone. I'm trying to use the ONBLUR event, on the email field, to then pass parameters to a JS function, which calls a PHP file, to insert a row into a MySQL db. I saw an example of how to do this, using a hidden field, possibly I need 3 hidden fields to pass the 3 parameters (value of fields) ?. Anyway, here is the code:
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Mar 27, 2010
There is a website that allows unlimited voting for one of my friend's sons. Someone else has been automating the process because another person received 14,000 votes in about an hour.
So my question is: [url]
How can I pass a parameter at the above site so that it votes for the selected person (example - PJ Howell) without clicking the name and then hitting vote?
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