The “Main” function


windows.addEvent('domready', function() {
/* put code here */
});


Checks to see if a value exists or is 0


if($chk(arg)) {
.......
}


Get Element

Get element list

var list = $$('ul.menu li');
list.each(function(element) {
/* process every element */
});


Get first child element

var firstUl = $('nav').getElement('ul');


Set element style

$('nav').set({
'styles': {
'display': 'block'
}
});