//welcome
function welcome(){
	var tNow = new Date();
	var iHour = tNow.getHours();
	var sWelcome;
	if(iHour == 23||iHour < 1){sWelcome='午夜';}
	else if(iHour <  6){sWelcome='凌晨';}
	else if(iHour <  8){sWelcome='早晨';}
	else if(iHour < 11){sWelcome='上午';}
	else if(iHour < 13){sWelcome='中午';}
	else if(iHour < 17){sWelcome='下午';}
	else if(iHour < 19){sWelcome='傍晚';}
	else{sWelcome='晚上';}
	sWelcome += '好!';
	document.write(sWelcome);
}

function checkdata() {
	if( fLogin.username.value.length<1 || fLogin.username.value.length>18 ) {
		eHint.innerHTML="\请您输入正确的用户名";
        fLogin.username.focus() ;
		return false;
	}
	if( fLogin.password.value.length<1 || fLogin.password.value.length>16 ) {
		eHint.innerHTML="\请您输入正确的密码";
        fLogin.password.focus() ;
		return false;
	}
}