function tabit(id,cid){
document.getElementById("tab1").className="menu2";
document.getElementById("tab2").className="menu2";
document.getElementById("tab3").className="menu2";
document.getElementById("tab4").className="menu2";
document.getElementById("tab5").className="menu2";
document.getElementById("tab6").className="menu2";
document.getElementById("tab7").className="menu2";

document.getElementById(id).className="menu1";

}