function checkWholeForm(theForm) {
    var why = "";
    why += checkUsername(theForm.username.value);
    if (why != "") {
       alert(why);
       return false;
    }
return true;
}
function checkUsername(strng) {
 var error = "";
 if (strng == "") {
    error = "You didn't enter a username.\n";
 }
}