JavaScript 2.0-The Complete Reference, Second ... - freecodingtutorial

validations[0]=["document.myform.username", "notblank"];
validations[1]=["document.myform.useremail", "validemail"];
validations[2]=["document.myform.favoritenumber", "isnumber"];
// Customize above array when used with a new page.
function isEmpty(s)
{
}
if (s == null || s.length == 0)
return true;
// The test returns true if there is at least one non-
// whitespace, meaning the string is not empty. If the
// test returns true, the string is empty.
return !/\S/.test(s);
function looksLikeEmail(field)
{
var s = field.value;
if (isEmpty(s))