function checkUsername(e) {
	var username = document.getElementById(e).value;
	var regEmail = new RegExp("@lycos\.com|@mailcity\.com","gi");
	if ( !username || username == "" ) {
		alert("Username field cannot be left blank.");
		document.getElementById(e).focus();
		return false;		
	}
	document.getElementById(e).value = username.replace(regEmail,'');	
}

function focus(){document.getElementById('m_U').focus();}