xmlhttp=new XMLHttpRequest();
var url = "get_data.pl";
xmlhttp.open("POST", url, true);
xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xmlhttp.onreadystatechange = function() {
    if(xmlhttp.readyState == 4 && xmlhttp.status == 200) {
        alert(xmlhttp.responseText);
    }
}
xmlhttp.send(null);

#!C:/Perl/bin/perl.exe
use strict;
use warnings;

&main;

sub main()
{
print "test";// I'd like the script being executed by Perl interpreter and return the string "test" .
}