$(document).ready(function() {
var divs = $('.mydivs>div');
var now = 0; // currently shown div
divs.hide().first().show();
$("button[name=next]").click(function(e) {
divs.eq(now).hide();
now = (now + 1 < divs.length) ? now + 1 : 0;
divs.eq(now).show(); // show next
});
$("button[name=prev]").click(function(e) {
divs.eq(now).hide();
now = (now > 0) ? now - 1 : divs.length - 1;
divs.eq(now).show(); // or .css('display','block');
//console.log(divs.length, now);
});
});