var jump = function(e) {
    e.preventDefault();
    var target = $(this).attr("href");
    $('html,body').animate(
   {
       scrollTop: $(target).offset().top
       //scrolldelay: 2 seconds
   }, 2000, function() {
       location.hash = target;
   });
}

$().ready(function() {

    $('a[href*=#contact]').bind("click", jump);
    $('a[href*=#portfolyo]').bind("click", jump);
    $('a[href*=#about]').bind("click", jump);
    $('a[href*=#header]').bind("click", jump);

});