Trace DNS Script

Having problems with script found here only parts of it do not work. http://www.realwebhost.net/trace.php
Get these 2 errors. Any help would be appreciated.

DNS Query Results:


Warning: Address is not in a.b.c.d form in /home/username/public_html/trace.php on line 87
Can't do a DNS query without a hostname.

WWWhois Results:


Warning: Address is not in a.b.c.d form in /home/username/public_html/trace.php on line 101
Can't WWWhois without a domain name.

PHP Code:
function dig($target){
message("<p><b>DNS Query Results:</b><blockquote>");
#$target = gethostbyaddr($target);

line 87 next line

if (! eregi("[a-zA-Z]", ($target = gethostbyaddr($target))) )
  $msg .= "Can't do a DNS query without a hostname.";
else{
  if (! $msg .= trim(nl2br(`dig any '$target'`))) #bugfix
    $msg .= "The <i>dig</i> command is not working on your system.";
  }
#TODO: Clean up output, remove ;;'s and DiG headers
$msg .= "</blockquote></p>";
message($msg);
}

function wwwhois($target){
$server = "whois.crsnic.net";
message("<p><b>WWWhois Results:</b><blockquote>");
$target = gethostbyaddr($target);

line 101 next line

if (! eregi("[a-zA-Z]", $target))
  $msg .= "Can't WWWhois without a domain name."; 

 

 

 

 

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