window.print

function contentPrint(contentArea) {
    var initBody = document.body.innerHTML;

    if ($("div").hasClass("scroll")) {
        $(".scroll").attr("class", "");
    }

    if (window.matchMedia) {
        var mediaQueryList = window.matchMedia('print');
        mediaQueryList.addListener(function (mql) {
            if (mql.matches) {
                document.body.innerHTML = document.getElementById(contentArea).innerHTML;
            } else {
                document.body.innerHTML = initBody;
            }
        });
    }

    window.onbeforeprint = function () {
        document.body.innerHTML = document.getElementById(contentArea).innerHTML;
    }
    window.onafterprint = function () {
        document.body.innerHTML = initBody;
    }

    window.print();
}

<p  style="page-break-before: always;"></p>
<br style="height: 0; line-height: 0" />