<!--
function nickname(field, aMsg1, aMsg2) {
var valid = "abcdefghijklmnopqrstuvwxyz0123456789._"
var valid2 = "abcdefghijklmnopqrstuvwxyz"
var ok = "yes";
var temp;

temp = field.value.substring(0, 1);
if (valid2.indexOf(temp) == "-1") {
	aMsg = aMsg1;
	ok = "no";
}

for (var i=0; i<field.value.length; i++) {
temp = "" + field.value.substring(i, i+1);
if (valid.indexOf(temp) == "-1") {
	aMsg = aMsg2;
	ok   = "no";
}
}


if (ok == "no") {
	alert(aMsg);
	field.focus();
	return false;
} else {
	return true;
}
}//-->