// This script is (c) copyright 2006 Jim Tucek under the
// GNU General Public License (http://www.gnu.org/licenses/gpl.html)
// For more information, visit www.jracademy.com/~jtucek/email/
// Leave the above comments alone!

//Modified by Simon Holywell for additional security
//and to add universal addresses array

if(!addresses) var addresses = new Array();
addresses.push("8507 1183 6714 6793 3415 4301 4814 6395 7880 1264 6395 173 3470 7758 3421 6395 4301 5998 4814 3415 6395 173 3415 3421 4814 6391 152 6395 6714 6391 6793 5998");
addresses.push("8507 1183 6714 6793 3415 4301 4814 6395 7880 1264 6395 173 3470 7758 3421 6395 4301 5998 4814 3415 6395 173 3415 3421 4814 6391 152 6395 6714 6391 6793 5998");
addresses.push("8507 1183 6714 6793 3415 4301 4814 6395 7880 1264 6395 173 3470 7758 3421 6395 4301 5998 4814 3415 6395 173 3415 3421 4814 6391 152 6395 6714 6391 6793 5998");
addresses.push("8507 1183 6714 6793 3415 4301 4814 6395 7880 1264 6395 173 3470 7758 3421 6395 4301 5998 4814 3415 6395 173 3415 3421 4814 6391 152 6395 6714 6391 6793 5998");
addresses.push("8507 1183 6714 6793 3415 4301 4814 6395 7880 1264 6395 173 3470 7758 3421 6395 4301 5998 4814 3415 6395 173 3415 3421 4814 6391 152 6395 6714 6391 6793 5998");
addresses.push("8507 1183 6714 6793 3415 4301 4814 6395 7880 1264 6395 173 3470 7758 3421 6395 4301 5998 4814 3415 6395 173 3415 3421 4814 6391 152 6395 6714 6391 6793 5998");

var decryption_cache = new Array();

function decrypt_string(crypted_string,n,decryption_key,just_email_address) {
	var cache_index = "'"+crypted_string+","+just_email_address+"'";

	if(decryption_cache[cache_index])					// If this string has already been decrypted, just
		return decryption_cache[cache_index];				// return the cached version.

	if(addresses[crypted_string])						// Is crypted_string an index into the addresses array
		var crypted_string = addresses[crypted_string];			// or an actual string of numbers?

	if(!crypted_string.length)						// Make sure the string is actually a string
		return "Error, not a valid index.";

	if(n == 0 || decryption_key == 0) {					// If the decryption key and n are not passed to the
		var numbers = crypted_string.split(' ');			// function, assume they are stored as the first two
		n = numbers[0];	decryption_key = numbers[1];			// numbers in crypted string.
		numbers[0] = ""; numbers[1] = "";				// Remove them from the crypted string and continue
		crypted_string = numbers.join(" ").substr(2);
	}

	var decrypted_string = '';
	var crypted_characters = crypted_string.split(' ');

	for(var i in crypted_characters) {
		var current_character = crypted_characters[i];
		var decrypted_character = exponentialModulo(current_character,n,decryption_key);
		if(just_email_address && i < 7)				// Skip 'mailto:' part
			continue;
		if(just_email_address && decrypted_character == 63)	// Stop at '?subject=....'
			break;
		decrypted_string += String.fromCharCode(decrypted_character);
	}

	decryption_cache[cache_index] = decrypted_string;			// Cache this string for any future calls

	return decrypted_string;
}

function decrypt_and_email(crypted_string,n,decryption_key) {
	if(!n || !decryption_key) { n = 0; decryption_key = 0; }
	if(!crypted_string) crypted_string = 0;

	var decrypted_string = decrypt_string(crypted_string,n,decryption_key,false);
	parent.location = decrypted_string;
}

function decrypt_and_echo(crypted_string,n,decryption_key) {
	if(!n || !decryption_key) { n = 0; decryption_key = 0; }
	if(!crypted_string) crypted_string = 0;

	var decrypted_string = decrypt_string(crypted_string,n,decryption_key,true);
	decrypted_string = obfuscate(decrypted_string);
	document.write(decrypted_string);
	return true;
}

// Finds base^exponent % y for large values of (base^exponent)
function exponentialModulo(base,exponent,y) {
	if (y % 2 == 0) {
		answer = 1;
		for(var i = 1; i <= y/2; i++) {
			temp = (base*base) % exponent;
			answer = (temp*answer) % exponent;
		}
	} else {
		answer = base;
		for(var i = 1; i <= y/2; i++) {
			temp = (base*base) % exponent;
			answer = (temp*answer) % exponent;
		}
	}
	return answer;
}

function obfuscate(address) {
    var obfuscated = "";
    for (i = 0; i < address.length; i++) {
        obfuscated += "&#" + address.charCodeAt(i) + ";";
    }
    return (obfuscated);
}
// -->