$(document).ready(function() {
    $("#q").keydown(function(event) {
        switch (event.keyCode) {
            case 13:
                search();
                return false;
                break;
        }
    });

});

function search() {
    var q = document.getElementById("q").value;
    location.href = "/products/search.aspx?q=" + q;
}
function keypressed() {
    if (window.event && window.event.keyCode == 13) {
        alert("enter");
        search();
    }
    else
        return true;

}