// JavaScript Document
function tab(id,curnum,tnum){
			for (var i = 0; i< tnum;i++ ){
				if(curnum == i){
					document.getElementById(id+"_title_"+curnum).className = "current";
					document.getElementById(id+"_main_"+curnum).style.display = "block";
				}else{
					document.getElementById(id+"_title_"+i).className = "";
					document.getElementById(id+"_main_"+i).style.display = "none";
				}
			}
		}