HTML5+javascript , How to connect with database like oracle,msql -

HTML5+javascript , How to connect with database like oracle,msql -

here question:

i want build webapplication using javascript , html5. can tell me how can create connection database oracle or mysql? because in application need load info databse html5 page.

can utilize webservice ? can utilize rest ?

what options , possibilities.

you may utilize ajax phone call php , transactions illustrated here http://www.w3schools.com/php/php_ajax_database.asp

javascript database html5 web-services rest