function jump(){
    state = $("upload").style.display;
    if (state == "") {
        $("upload").style.display = "none";
        new Effect.BlindDown($("paste"));
        $("change").src = "/static/img/upload.gif"
    } else {
        $("paste").style.display = "none";
        new Effect.BlindDown($("upload"));
        $("change").src = "/static/img/paste.gif"
    }
};