Random Snippets

function findParentNode(parentName, childObj) {
var testObj = childObj.parentNode;
var count = 1;
while(testObj.getAttribute(‘name’) != parentName) {
alert(‘My name is ‘ + testObj.getAttribute(‘name’) + ‘. Let\’s try moving up one level to see what we get.’);
[...]

function calculate(equation) {
var answer = eval(equation);
document.getElementById(’screen’).value = answer;
}
function pushButton(buttonValue) {
if (buttonValue == ‘C’) {
document.getElementById(’screen’).value = ”;
}
else {
[...]

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:

function removeElement(parentDiv, childDiv){
if (childDiv == parentDiv) {
alert(“The parent div cannot be removed.”);
}
else if (document.getElementById(childDiv)) {
var [...]

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 – [...]