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How to loop through checkboxes or radio button groups via JavaScript

May 15th, 2008  |  by Knix  |  published in javascript

function loopForm(form) {
var cbResults = ‘Checkboxes: ‘;
var radioResults = ‘Radio buttons: ‘;
for (var i = 0; i < form.elements.length; i++ ) {
if (form.elements[i].type == ‘checkbox’) {
[...]

How to dynamically add content to a div and store the content to a cookie via JavaScript

April 14th, 2008  |  by Knix  |  published in javascript

function addContent(divName, content) {
document.getElementById(divName).innerHTML = content;
}
function setCookie(c_name,value,expiredays) {
var exdate=new Date();
exdate.setDate(exdate.getDate()+expiredays);
document.cookie=c_name+ “=” +escape(value)+((expiredays==null) ? “” : “;expires=”+exdate.toGMTString());
}
function getCookie(c_name) {
if (document.cookie.length>0) {
c_start=document.cookie.indexOf(c_name + “=”);
[...]

How to validate email format via JavaScript

April 1st, 2008  |  by Knix  |  published in javascript

This JavaScript demo verifies that an email address is in the correct format and that the user has typed in the same address in both fields to prevent mistyping of the address. I have borrowed the regex for verifying the correct email format from a different site.

Demo

Email:

Please type in your email again:

How to find and replace text dynamically via JavaScript

March 7th, 2008  |  by Knix  |  published in javascript

This is a neat little script that demonstrates two things:
1) Find - If only the Find box is filled in, then the findMyText() JavaScript function will just perform a find for the div that is given. If there is a match, the text will be highlighted and marked in bold.
2) Find and Replace - [...]

JavaScript to select all or none of the checkboxes in a form

February 28th, 2008  |  by Knix  |  published in javascript

function selectToggle(toggle, form) {
var myForm = document.forms[form];
for( var i=0; i < myForm.length; i++ ) {
if(toggle) {
myForm.elements[i].checked = “checked”;
[...]

How to dynamically add form elements via JavaScript

February 21st, 2008  |  by Knix  |  published in javascript

Not all forms are meant to be static. Sometimes, you want to allow the users to add certain parts of the form as they need them. Here is a nice example of dynamically adding inputs to your form as users need them. In addition, an input limit has been implemented in the [...]

How to hide, show, or toggle your div

February 12th, 2008  |  by Knix  |  published in javascript

Are you trying to find a way to hide and show your content? The demo below shows a simple yet elegant way of toggling your content and toggling the control text via Javascript and styling.

function toggle() {
var ele = document.getElementById(”toggleText”);
var text = document.getElementById(”displayText”);
if(ele.style.display == “block”) {
ele.style.display = “none”;
text.innerHTML = [...]

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