Get element object
Get object with the specified ID:

var x = document.getElementById('nav');


Attaching Event Handlers

document.getElementById('xxx').onclick = function() {location.href='xxx.htm';return false;}


Form
submit form:

document.formname.submit()

get form element’s value

var v1 = formname.element.value


Array

var mycars=new Array();
mycars[0]=”Saab”;
mycars[1]=”Volvo”;
mycars[2]=”BMW”;
var i;
for (i in mycars) {
document.write(mycars[i] + ‘<br/>’);
}