$(document).ready(function() {
    $(".search input").focus(function() {
        var input = $(this);
        if (input.val() == '...leita') {
            input.val('');
        }
    });
    $(".search input").blur(function() {
        var input = $(this);
        if (input.val() == '') {
            input.val('...leita');
        }
    });

    $(".search input").keyup(function(e) {
        if ((e.keyCode == 13 || e.charCode == 13 || e.which == 13) && $(this).val() != "") {
            WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions("ctl00$pageTop$ctl00$btnLeita", "", true, "", "", false, true));
        }
    });

});