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//Ingles

$(window).height();   // returns height of browser viewport
$(document).height(); // returns height of HTML document
$(window).width();   // returns width of browser viewport
$(document).width(); // returns width of HTML document

//for screen size you can use screen object in the following way:

screen.height;
screen.width;

/* IMAGEN
rw1mba.bay.livefilestore.com/y1paDRAFYTHyZb0-_w7yKTxlxQ6WJQMqpyhpJc-0OAkQyaf-oIJ09bsnlnw3ZxiBC5UomPeaEngs9TqCf4QDFBnind_kdzfJIpv/ok.png?psid=1
*/