# Where's "use strict", "use warnings"?

# Where's your error checking for open?
if (open(MYFILE,"htmlfile.txt")) {
	$line = <MYFILE>;
	
	# Don't think this regex is going to do what you want.  Should probably focus on this first and see if @array contains what you expect.  We might be able to suggest a better regex if we actually saw teh real data.
	@array = ($line =~ m/<.^>*>/g);
	
	print"ARRAY iS @array\n";
	for ($i=0;$i<@array;$i++){ 
		print "The Element $i is $array$i\n";
	}
	
	for ($j=0; $j<@array; $j++){
		for ($k=$j+1; $k<@array; $k++){
			
			# What's this you're tryign to do here?  
			if ($array$j eq $array$k){
				
				# Another hrm...
				print " substring($array$j,$array$k)\n";
			}
		}
	}
}