// JavaScript Document

function validUsername(username)
{
   invalidChars = ":,;'="

   if (username == "")
      return false

   for (i=0; i<invalidChars.length; i++)
   {
      badChar = invalidChars.charAt(i)

      if (username.indexOf(badChar,0)>-1)
         return false
   }

   return true
}


function submitIt (joinForm)
{
   if (joinForm.username.value == "")
   {
      alert("Please enter a username.")
	  return false
   }

   if (!validUsername(joinForm.username.value))
   {
      alert("Invalid character of username. Please enter your username again.")
      return false
   }

   return true
}