function dttm()
{
	var days=new Array("Chu nhat","Thu 2","Thu 3","Thu 4","Thu 5","Thu 6","Thu 7");
	var mons=new Array("Thang 1","Thang 2","Thang 3","Thang 4","Thang 4","Thang 5","Thang 7","Thang 8","Thang 9","Thang 10","Thang 11","Thang 12");
	sys_date=new Date();
	sys_dd=sys_date.getDate();
	sys_mm=sys_date.getMonth();
	sys_yyyy=sys_date.getYear();
	sys_hours=sys_date.getHours();
	sys_mins=sys_date.getMinutes();
	sys_secs=sys_date.getSeconds();
	sys_day=sys_date.getDay();
	sys_w_day=days[sys_day];
	sys_w_mon=mons[sys_mm];
	disp_time=sys_hours+":"+sys_mins+":"+sys_secs;
	window.status="Hom nay la: "+sys_w_day + " ngay " + sys_dd +" thang "+sys_w_mon+" nam "+sys_yyyy+". Bay gio la "+disp_time;
	setTimeout("dttm()",1000);
}
function EmailChecker(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    return false
		 }
 		 return true					
	}