var tabToggleRolling = new Array();
function tabToggle(obj,tab,img,tnum,roll) {
	if(tab=='random'){
		var rnum = Math.floor(Math.random() * tnum) + 1;
		tab = rnum;
	}
	if(tab=='rolling'){
		tabToggleRolling[roll] = (!tabToggleRolling[roll])?1:tabToggleRolling[roll]+1;
		if(tabToggleRolling[roll]>tnum) tabToggleRolling[roll] = 1;
		tab = tabToggleRolling[roll];
	}
	if(tnum=='rolling'){
		tabToggleRolling[roll] = tab;
		tab = tabToggleRolling[roll];
	}
	var tab_list = document.getElementById(obj).getElementsByTagName('li');
	for(i=1;i<=tab_list.length;i++){
		(tab==i)?tab_list[i-1].className='on':tab_list[i-1].className='';
		document.getElementById(obj+'_'+i).style.display = (tab==i)?'':'none';
		if(img){
			var imgEl=tab_list[i-1].getElementsByTagName("img").item(0);
			imgEl.src = (tab==i)? imgEl.src.replace("off.jpg", "on.jpg"):imgEl.src.replace("on.jpg", "off.jpg");
		}
	}
}