var bbTab=1;
function setTab(n)
{
    if (n != bbTab)
    {
        document.getElementById("tab_li_" + bbTab).className = "";
        document.getElementById("tab_li_" + n).className = "now";
	document.getElementById("tablist_" + n).className = "tablist block";
	document.getElementById("tablist_" + bbTab).className = "tablist";
	bbTab = n;
    }
}