//最新求购|最新供应| 窗口切换

function tabit(id,cid) {
biz_tit1.className="taboff";biz_tit2.className="taboff";biz_tit3.className="taboff";biz_tit4.className="taboff";biz_tit5.className="taboff";id.className="tabon";
biz_1.style.display="none";biz_2.style.display="none";biz_3.style.display="none";biz_4.style.display="none";biz_5.style.display="none";cid.style.display="block";
//winname=cid;
}

function showall() {
biz_tit1.className="tabon";biz_tit2.className="tabon";biz_tit3.className="tabon";biz_tit4.className="tabon";biz_tit5.className="tabon";
biz_1.style.display="block";biz_2.style.display="block";biz_3.style.display="block";biz_4.style.display="block";biz_5.style.display="block";
}