function switchTab(lvl,chk,maxtabs){
	
	for(i=0;i<maxtabs;i++){
		
		var test=getObj('lvl'+lvl+'_'+i);
		var li=getObj('l'+lvl+'_'+i);
		if(test){
			
			if(i==chk){

				test.style.visibility='visible';
				test.style.zIndex=1;
				setBG(li,'#acacac');
			
			} else {
			
				test.style.visibility='hidden';
				test.style.zIndex=-1;
				setBG(li,'#f2f2f2');
			
			}
		}
	}
}