open(DATAFILEIN, "$catagory.dat") || print "Your listing is the first in this category!<br>";
	flock (DATAFILEIN, 2);
	while(<DATAFILEIN>) {
		@line_pair = split(/=/,$_);
		$time2 = $line_pair[6];
		$currenttime = time ();
		$difference = $currenttime - $time2;
		#computing the number of seconds before it expires
		$expires = $expire_after_days * 86400;
		if($difference < $expires){
			push (@temp,$_);
		}
		
	}
	flock (DATAFILEIN, 8);
	if (open(DATAFILEOUT, ">$catagory.dat") ) {
		flock (DATAFILEOUT, 2);
		print DATAFILEOUT "$time=$company_name=$email=$member1=$member1phone=$data=$expiretime=$pictureurl=$password=$website=$member2=$member2phone=$address=$citystatezip=$fax=$catlisting\n";
		print DATAFILEOUT @temp;
		userlog();

##</code><code>##

			open(DATAFILEIN,"$catagory.dat") || print "This section is currently empty...Please check back often!";
			print "<table border=0 cellpadding=0 border=0>";

			while (<DATAFILEIN>) {
				chomp $_;
				@line_pair = split(/=/,$_);
				$company_name = $line_pair[1];
				$time = $line_pair[0];
				$email= $line_pair[2];
				$member1= $line_pair[3];
				$member1phone= $line_pair[4];
				$data= $line_pair[5];
				$time2 = $line_pair[6];
				$data = &stripBadHtml($data);
				$password= $line_pair[8];
				$pictureurl= $line_pair[7];
				$website= $line_pair[9];
				$member2= $line_pair[10];
				$member2phone= $line_pair[11];
				$address= $line_pair[12];
				$citystatezip= $line_pair[13];
				$fax= $line_pair[14];
				$catlisting= $line_pair[15];