The code seemed to work for me.

Using pm_txt.txt for input for pm_regex.pl pm_txt.txt

1.hello>
2.<hello
3.hello
<hello>
[download]

pm_regex.pl

use strict;
use warnings;

my $filename = shift or die "Usage $0 FILENAME\n";

open my $fh, '<', $filename or die "Could not open '$filename'\n";

while (my $line = <$fh>) {
    chomp $line;
    if ($line =~ /^\d+\..*?(hello).*$/) {
        print "In $line $1 matches\n";
    } else {
        print "$line doesn't match\n";
    }
}
[download]

Running perl pm_regex.pl pm_text.txt produced the output:

In 1.hello> hello matches

In 2.<hello hello matches

In 3.hello hello matches

<hello> doesn't match

Please go to http://regexpal.com/ In java script, I need only a regex that I can use as a condition in my software.

Please go to http://regexpal.com/ In java script, I need only a regex that I can use as a condition in my software.

So you're looking for a javascript regex?