# Creating Functions Dynamically

Jul 20, 2005

Given an expression f = &#392;*x+3' from a user input I would like to do some sort of:

function userFunction(x):
return f(x)

is it possible with Javascript?

## Creating Calculator Using AppendDigit And Else If Functions?

Oct 20, 2010

I am new to Java and my teacher goes way too fast in class and am a day behind on this calculator. Our assignment is to make a Calculator using AppendDigit and Else if functions in the java code. Some of my other code in html may be messed up as well. I am just lost so here is the HTML:

Code:
<title>John's Calculator</title>
<style type="text/css">
.rt {text-align:right; font-family: Courier New;}
.numbttn {text-align: center; background-color:
silver; font-family: Courier New; width 4eM;}
body {background-color: silver} .....

And Here is the pathetic Javascript which I have barely started:
Code:
// cal Applet- John Falco- 20 October 2010
function clear TB() {
document.form.kpd.display.value="0";
}
function AppendDigit (x) {
if (x==".") {
if ((!HasDecimal))
}
else {
document.forms.kpd.display.value =
document.forms.kdp.display.value + X;
};

## Creating A M*n Table Using Functions And For Loops?

Oct 16, 2011

Write a script to generate two random numbers for variable m and n, the values generated for the variables should range from 1 to 10. We want to make an m * n table (m rows and n columns) with the word Hello in each of its cells. Now define a function f with one parameter n that displays n columns of one row of the table (You need a for-loop). Call this function m times to display m rows of the table. For example if m = 6 and n = 4 we should get the following:

HelloHelloHelloHello
HelloHelloHelloHello
HelloHelloHelloHello

[code]....

(The above is supposed to be a table but did not copy fully)This was my attempt, although i really did not know how to attack this.

<script type="text/javascript">
function f(n)
{

[code]...

## Jquery :: Creating Multiple Click Functions With Same Id?

Jun 8, 2009

I would like to simplify some of my jquery code.I have multiple add functions:

Code:

<table1>
<form>
<input type="text" name="title">

[code]...

With this when you click the first one it works but not the second.I worked my way around this but I had to increment add like add1 add2 add3. Now this creates alot of code in my javascript and html.

## Creating Generic Javascript Functions (ie. El.onmouseclick = Function ...)

Jan 8, 2007

without having to put onclick event in every tag. For example:

<script>
document.getElementsByTagName('input').onclick = function () {
}
</script>

Now, I know the above does not work as I have tried it but hopefully
the idea of what I am trying to achieve here. Basically for every input
tag, when the user triggers the event (click) it will do the same
function.

where you assign functions to events. However, I dont know what to

## Dynamically Creating A New Div?

Feb 10, 2010

I'm using the following code to create a quick and dirty search tool for a site we're building at work as part of an RFP.My issue is that rather than creating a new window for the results page (which is what it does now), I'd really prefer that a new div be dynamically created on the page where the results would be placed.Maybe that's not possible? At the very least,how to make the results display in the same window rather than opening a new one?

<SCRIPT LANGUAGE="JavaScript">
var item = new Array();

[code]....

## Creating <a> Tag Dynamically?

Mar 15, 2010

I created <a> tag dynamically and attached event to it.

Code:

"attachEvent" is working only in IE. How to make that working in other browsers like Chrome/FF?

## Dynamically Add Functions To Other?

Oct 26, 2011

I thought about following code snippet code...

Has anyone an idea, if my thoughts on that are correct oder if this behaviour could be a problem?

And is there probably a better way to combine functions, so that all functions would be in one column?

## Need Help Dynamically Creating Forms With DOM

Jul 23, 2005

I'm trying to create a fairly simple form which contains a label, a
button, and a textbox.

I've done quite a bit of reading and, from what I can figure, the
following should work, but isn't....

var rowCommentBox = document.createElement("TR");
var cellCommentBox = document.createElement("TD");
var frmCommentBox = document.createElement("FORM");
frmCommentBox.setAttribute("METHOD", "POST");
frmCommentBox.setAttribute("ACTION", strAction);
var rowFrmCommentBox = document.createElement("TR");
var cellFrmCommentBoxLabel = document.createElement("TD");
var strFrmCommentLabel = document.createTextNode("comment:");
var cellFrmCommentBoxButton = document.createElement("TD");
var btnFrmCommentBoxButton = document.createElement("INPUT");
btnFrmCommentBoxButton.setAttribute("TYPE", "SUBMIT");
btnFrmCommentBoxButton.setAttribute("VALUE", "UPDATE");
var cellFrmCommentBoxTxtbx = document.createElement("TD");
var txtbxFrmCommentBoxTxtbx = document.createElement("INPUT");
txtbxFrmCommentBoxTxtbx.setAttribute("TYPE", "TEXT");
txtbxFrmCommentBoxTxtbx.setAttribute("cols", "50");

cellFrmCommentBoxLabel.appendChild(strFrmCommentLa bel);
rowFrmCommentBox.appendChild(cellFrmCommentBoxLabe l);
cellFrmCommentBoxButton.appendChild(btnFrmCommentB oxButton);
rowFrmCommentBox.appendChild(cellFrmCommentBoxButt on);
cellFrmCommentBoxTxtbx.appendChild(txtbxFrmComment BoxTxtbx);
rowFrmCommentBox.appendChild(cellFrmCommentBoxTxtb x);
frmCommentBox.appendChild(rowFrmCommentBox);
rowCommentBox.appendChild(frmCommentBox);

May 11, 2011

I have a page where I dynamically add functions to links. I want the links to pop up with the index values, why does it alway popup with 5? I expect 1,2,3 or 4.
See code below:

<html><body>
<ul>

[Code].....

## Dynamically Add Functions To Other Function?

Oct 27, 2011

i thought about following code snippet:

Code:
var newfunc = function() {
//...
}

[Code].....

Has anyone an idea, if my thoughts on that are correct oder if this behaviour could be a problem? And is there probably a better way to combine functions, so that all functions would be in one column?

## JQuery :: Creating Parameters Dynamically?

Sep 24, 2009

I know this is not strictly related to jquery but I don't know how to make it works. I'm working on a function that has as variable an array and for each element I need to create a piece of code for an other function. For instance when the array contains [0,1,2] I need to call

[Code]...

## Creating Links In A Dynamically Created Div

Sep 20, 2009

im trying to create a script for greasemonkey but its still written in javascript. so here is what im trying to do. Ive got a dynamically created division that aligns to the right of the browser window. Now im trying to put links inside it as you normally would with like a document.write statement or other methods. The only problem is, any method i try wont work for me. heres my code, maybe someone could give me some things i could try.

[Code]....

## Dynamically Creating An Array In A For Loop?

Apr 21, 2011

I am trying to create a function that creates an array comprised of filenames based on a given range. I.E if 2-8 is selected and a foldername of UMCP/ and a common name of college is also given, the function should return and array such as [UMCP/college2.jpg,UMCP/college3.jpg.....UMCP/college8.jpg]. Here is what I've got but the alert that should tell me the filename of the first image says it is undefined, how can i fix this?

function getArrayPhotosNames (total,count,first,last) {
var folderName = document.getElementById("photofold").value;
var Alias = document.getElementById("commonName").value;

[Code]....

## Dynamically Creating And Naming Objects?

Oct 13, 2010

I've got an input with a value. The input is called 'command2' and I want to send it's value to the 'rover2' object (although I don't know if that object exists yet). I test and say if(rover2){... and if not then I create the object/if so then I insert the value.Question is: I want to do:Code JavaScript:var rover2 = new Rover();but I want to pass the name of the new object by association, so in effect:Code JavaScript:var "rover"+i = new Rover();How would you do that? So that the objects and their names are generated dynamically (or [perhaps a better explanation] so that the string value of a variable can be used as the name of new variable/object)?PS Bonus marks: If I hold HTML fragments as an object and those fragments include inputs, is the value of the input collected as well? i.e. if I have

Code HTML4Strict:
<fieldset>
<input id="foo" type="text" />

[code]....

## Dynamically Creating Variable Names

Aug 9, 2003

Here's my problem: I need to create a variable name dynamically, made up of a string (say "var_name_") and an integer. Ultimately I want something like this:

var_name_1 = 'whatever value I want'
var_name_2 = 'whatever value I want'
var_name_3 = 'whatever value I want'
...
var_name_N = 'whatever value I want'

But the actual variable names are determined at run-time, so I can't just hardcode them.

Any suggestions? JavaScript doesn't seem to have a Variable type, so I can't just cast a string into a var...

## Creating Text Boxes Dynamically?

Dec 2, 2010

As part of my form I have a box for the user to input the number of text boxes needed. I already have the page creating the textboxes but do not know the IDs of each text box. Once the user adds textboxes they can click add again to create more. If the user previously added 3 textboxes and now enters 4 I want the program to just add one more instead of 4 more.

[Code]...

## Dynamically Adding Javascript Functions On The Fly?

Apr 1, 2006

Might there be a way to add a set of Javascript functions to a display page's existing set of Javascript functions on the fly without reloading the display page, and if so, how?

A couple of approaches I have tried, but without success are:

- A) For an embedded "retriever" IFrame in the display page to retrieve a set of JS functions from the server and then on its "onload" transfer (by innerHTML transference) that set of functions into the parent display page.

- B) Similiar to "A" but to use regular old browser frames - one being the "retriever" and one being the display page.

- C) Using a JS function in the display page to make a http request for a supplementary .js file(s).

Please note: the goal is to retrieve *only* an additional set of Javascript functions from the server, and then add them to an "original" set of functions already loaded into the browser. Meaning, NOT - say - for an IFrame to download from the server *both* the additional set and again the "original" set, which the parent display page could then run directly from the IFrame.

After "A", "B", and "C", I'm at a loss for further ideas.

## JQuery :: Dynamically Creating New Form Elements?

Aug 20, 2010

I have form that asks a simple question: "How many XYZs do you want to create?" Then, for every XYZ, it should create several new labels/inputs in the form.

That is, every XYZ looks like this:
<div id="xyz">
<label>Whatever</label>
<input> blah blah blah </input
</div>

I looked into .each() and .live(), but I can't wrap my mind around how to do this.

## Dynamically Creating Canvas Tags At Runtime?

May 15, 2010

I want to find a way of using canvas tags that are created at runtime. I went about this by trying to change the id of the tag, ONLY to find out that javascript did not like the fact that I was using numbers, even though I converted to String first...
var count = 0;
for (var item=0; item<20; item ++) {
if (count%5==0){
document.write(" ||| ");
}
var canv = document.createElement("canvas");
canv.setAttribute('width',300);
canv.setAttribute('height',300);

num = 505;
aStr = num.toString(); // does NOT do the job for some reason !!!???
aStr = 'canvas'; // this works...
canv.setAttribute('id',aStr);
document.body.appendChild(canv);
count += 1;
}
var C = document.getElementById(canv.getAttribute('id'));
if (C.getContext) {
makePlot(C); // does the plot to the canvas
}

## Set Attributes In Dynamically Creating Table Structure?

Nov 1, 2011

Im developing a script for dynamically creating html table structure so that from the input that has been given to the function it will fetch the values one by one and will create the structure. My problem is i want to add attributes to the elements created. sample code attached.

with( window['o' + elementname]){
for(j=0;j<attrs.length;j++)
{
if(attrs[j].indexOf("=")!=-1){

[Code]....

here the element name will be get from the parameters passed to the function. i want to verify whether the line in bold is correct or not coz the id is not updated in output.

## Onclick Doesn't Work When Dynamically Creating Div

Feb 5, 2010

I'm a JavaScript noob, and I'm playing with it. I have some code which created a div inside another div by using the innerHTML of the outer div. That had an onclick event which worked fine. Now I'm trying to create the div as an object, so I'm doing something like this:

Code JavaScript:

var obj = document.createElement('div');
obj.id = "object";
obj.innerHTML = "something"; // an img tag in the actual code
document.getElementById('objects').appendChild(obj);

The new div is shown, but clicking on it does nothing. (I originally had another function, but changed to the alert for testing.)

## Creating Labels To Dynamically Generated Output

Apr 16, 2011

Im having problem generating the labels for content created by the following function:

function setOutput(){
var article = document.createElement("div");
var weight = document.createElement("div");
var price = document.createElement("div");
article.className = "article";
weight.className = "weight";
price.className = "price";
results.appendChild(article);
results.appendChild(weight);
results.appendChild(price);
}

}
A friend wrote this sample script to achieve generation of labels on my script, but I have been trying for hours with no luck, can someone take a look and tell me the correct usage of this script:

Code:
function createLabel() {
var target = document.getElementById("target");
var label = document.createElement("label");
var text = document.createTextNode("Article");
label.appendChild(text);
target.appendChild(label);
}
Can you help me with the correct "combination" using my script above, a "real life" example?

## Dynamically Creating A Table With Mouseover Hilite?

Apr 24, 2010

html and javascript and am having problems getting a table to be generated from a given set of rows and cols. I was successful at creating the table, but trying to add functionality such as mouse over is giving me some trouble. I have a feeling its because my variables are out of scope when the function is hit, but can't think of a better way to do it.

function setTable(){
var myElem = document.getElementById('tableDiv');
numRows = 16;

[code].....

## Dynamically Added Row - Deleterow - Submit And Functions

Mar 10, 2010

I have table in Javascript and it has addrow, deleterow, submit, and functions. when i click it automatically adds new row and it has select option to choose some of them for ex. in added two rows one of them is Motherboard Asus and other is Motherboard Gigabyte.

What i want is when i choose motherboard Asus it added news row with select option Motherboard asus and disabled select option and second time when i click add button let it adds rows but among select options let it ejects Motherboard ASUS. and with this way at the last there will be no options to select

Here is my code:

## JQuery :: Creating Table Rows With Dates Dynamically?

Sep 6, 2011

I have a feeling this is going to get ugly quick but here goes. I havetable rows with dates (IE: Sunday, January 1, 2011). I need to be able to "clone" the rows with this caveat. I need to recalculate the number of rows based on a day/week combination.. ex: September 1st 2011 falls on a Thursday so my pattern would look like this:

[Code]...