function showdiv(divnum,divbefor){
        for(i=1;i<=divnum;i++){
				if(i==divbefor){
						document.getElementById("Nav_"+i).className = "CateNav_ON"
						document.getElementById("List_"+i).className ="NavOn List_BG";
				}else{
						document.getElementById("List_"+i).className ="NavOFF List_BG";
						document.getElementById("Nav_"+i).className = "CateNav_OFF"
				}
        }
}