function doDivShift(str){
	switch(str){
	   case "todayList" :
			document.getElementById("div_todayList").style.display='';
			document.getElementById("div_yesterdayList").style.display='none';
			document.getElementById("div_byesterList").style.display='none';
			document.getElementById("div_weekList").style.display='none';
			document.getElementById("li_todayList").className='up';
			document.getElementById("li_yesterdayList").className='bgnone';
			document.getElementById("li_byesterList").className='';
			document.getElementById("li_weekList").className='';
			break;
	   case "yesterdayList" :
			document.getElementById("div_todayList").style.display='none';
			document.getElementById("div_yesterdayList").style.display='';
			document.getElementById("div_byesterList").style.display='none';
			document.getElementById("div_weekList").style.display='none';
			document.getElementById("li_todayList").className='bgnone';
			document.getElementById("li_yesterdayList").className='up';
			document.getElementById("li_byesterList").className='bgnone';
			document.getElementById("li_weekList").className='';
			break;
	   case "byesterList" :
			document.getElementById("div_todayList").style.display='none';
			document.getElementById("div_yesterdayList").style.display='none';
			document.getElementById("div_byesterList").style.display='';
			document.getElementById("div_weekList").style.display='none';
			document.getElementById("li_todayList").className='bgnone';
			document.getElementById("li_yesterdayList").className='';
			document.getElementById("li_byesterList").className='up';
			document.getElementById("li_weekList").className='bgnone';
			break;
	   default:
			document.getElementById("div_todayList").style.display='none';
			document.getElementById("div_yesterdayList").style.display='none';
			document.getElementById("div_byesterList").style.display='none';
			document.getElementById("div_weekList").style.display='';
			document.getElementById("li_todayList").className='bgnone';
			document.getElementById("li_yesterdayList").className='';
			document.getElementById("li_byesterList").className='';
			document.getElementById("li_weekList").className='up';
	}
}