function tabs(tab) {
    $("#"+tab).css({display: "block"});
    if (tab == 'one') {
        $("#two").css({display: "none"});
        $("#three").css({display: "none"});
        $("#four").css({display: "none"});
    } else if (tab == 'two') {
        $("#one").css({display: "none"});
        $("#three").css({display: "none"});
        $("#four").css({display: "none"});
    } else if (tab == 'three') {
        $("#one").css({display: "none"});
        $("#two").css({display: "none"});
        $("#four").css({display: "none"});
    } else if (tab == 'four') {
        $("#one").css({display: "none"});
        $("#two").css({display: "none"});
        $("#three").css({display: "none"});
    }
}