<!--
function check_n()
{
  if( document.Check_n.username.value.length == 0 ) {
    alert( "對不起：您沒填寫帳號喔！\n" );
    return false;
  }
	
  if( document.Check_n.email.value.length == 0 ) {
    alert( "對不起：E-Mail沒有填喔！\n" );
    return false;
  } else {
    i = document.Check_n.email.value.indexOf( "@" );
    j = document.Check_n.email.value.indexOf( ".", i );
    k = document.Check_n.email.value.indexOf( "," );
    kk = document.Check_n.email.value.indexOf( " " );
    jj = document.Check_n.email.value.lastIndexOf( "." ) + 1;
    len = document.Check_n.email.value.length;
    if( ( i <= 0 ) || ( j <= 2 ) || ( k != -1 ) || ( kk != -1 ) || ( len - jj < 2 ) || ( len - jj > 3 ) ) { 
      alert( "對不起：E-Mail 填的不正確喔！\n" );
      return false;
    }	
  }
}


//-->