/**
*
*  Secure Hash Algorithm (SHA256)
*  http://www.webtoolkit.info/
*
*  Original code by Angel Marin, Paul Johnston.
*
**/
 
function SHA256(s){
 
	var chrsz   = 8;
	var hexcase = 0;
 
	function safe_add (x, y) {
		var lsw = (x & 0xFFFF) + (y & 0xFFFF);
		var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
		return (msw << 16) | (lsw & 0xFFFF);
	}
 
	function S (X, n) { return ( X >>> n ) | (X << (32 - n)); }
	function R (X, n) { return ( X >>> n ); }
	function Ch(x, y, z) { return ((x & y) ^ ((~x) & z)); }
	function Maj(x, y, z) { return ((x & y) ^ (x & z) ^ (y & z)); }
	function Sigma0256(x) { return (S(x, 2) ^ S(x, 13) ^ S(x, 22)); }
	function Sigma1256(x) { return (S(x, 6) ^ S(x, 11) ^ S(x, 25)); }
	function Gamma0256(x) { return (S(x, 7) ^ S(x, 18) ^ R(x, 3)); }
	function Gamma1256(x) { return (S(x, 17) ^ S(x, 19) ^ R(x, 10)); }
 
	function core_sha256 (m, l) {
		var K = new Array(0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5, 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5, 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3, 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174, 0xE49B69C1, 0xEFBE4786, 0xFC19DC6, 0x240CA1CC, 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA, 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7, 0xC6E00BF3, 0xD5A79147, 0x6CA6351, 0x14292967, 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13, 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85, 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3, 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070, 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5, 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3, 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208, 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2);
		var HASH = new Array(0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A, 0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19);
		var W = new Array(64);
		var a, b, c, d, e, f, g, h, i, j;
		var T1, T2;
 
		m[l >> 5] |= 0x80 << (24 - l % 32);
		m[((l + 64 >> 9) << 4) + 15] = l;
 
		for ( var i = 0; i<m.length; i+=16 ) {
			a = HASH[0];
			b = HASH[1];
			c = HASH[2];
			d = HASH[3];
			e = HASH[4];
			f = HASH[5];
			g = HASH[6];
			h = HASH[7];
 
			for ( var j = 0; j<64; j++) {
				if (j < 16) W[j] = m[j + i];
				else W[j] = safe_add(safe_add(safe_add(Gamma1256(W[j - 2]), W[j - 7]), Gamma0256(W[j - 15])), W[j - 16]);
 
				T1 = safe_add(safe_add(safe_add(safe_add(h, Sigma1256(e)), Ch(e, f, g)), K[j]), W[j]);
				T2 = safe_add(Sigma0256(a), Maj(a, b, c));
 
				h = g;
				g = f;
				f = e;
				e = safe_add(d, T1);
				d = c;
				c = b;
				b = a;
				a = safe_add(T1, T2);
			}
 
			HASH[0] = safe_add(a, HASH[0]);
			HASH[1] = safe_add(b, HASH[1]);
			HASH[2] = safe_add(c, HASH[2]);
			HASH[3] = safe_add(d, HASH[3]);
			HASH[4] = safe_add(e, HASH[4]);
			HASH[5] = safe_add(f, HASH[5]);
			HASH[6] = safe_add(g, HASH[6]);
			HASH[7] = safe_add(h, HASH[7]);
		}
		return HASH;
	}
 
	function str2binb (str) {
		var bin = Array();
		var mask = (1 << chrsz) - 1;
		for(var i = 0; i < str.length * chrsz; i += chrsz) {
			bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (24 - i%32);
		}
		return bin;
	}
 
	function Utf8Encode(string) {
		string = string.replace(/\r\n/g,"\n");
		var utftext = "";
 
		for (var n = 0; n < string.length; n++) {
 
			var c = string.charCodeAt(n);
 
			if (c < 128) {
				utftext += String.fromCharCode(c);
			}
			else if((c > 127) && (c < 2048)) {
				utftext += String.fromCharCode((c >> 6) | 192);
				utftext += String.fromCharCode((c & 63) | 128);
			}
			else {
				utftext += String.fromCharCode((c >> 12) | 224);
				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
				utftext += String.fromCharCode((c & 63) | 128);
			}
 
		}
 
		return utftext;
	}
 
	function binb2hex (binarray) {
		var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
		var str = "";
		for(var i = 0; i < binarray.length * 4; i++) {
			str += hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8+4)) & 0xF) +
			hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8  )) & 0xF);
		}
		return str;
	}
 
	s = Utf8Encode(s);
	return binb2hex(core_sha256(str2binb(s), s.length * chrsz));
 
}

/*
Part of the code for the article "Use Ajax and PHP to Build Your Mailing List"
by Aarron Walter (aarron@aarronwalter.com)
http://www.sitepoint.com/article/use-ajax-php-build-mailing-list
*/

// Attach handler to window load event
Event.observe(window, 'load', init, false);

function init() {
  // Attach handler to form's submit event
  Event.observe('addressForm', 'submit', storeAddress);
  Event.observe('getaddresses', 'submit', getAddress);
}

function storeAddress(e) {
  // Update user interface
  $('response').innerHTML = 'Adding email address...';
  // Prepare query string and send AJAX request
  var pars = 'address=' + escape($F('address'));
  var myAjax = new Ajax.Updater('response', 'include/ajaxServer.php', {method: 'get', parameters: pars});
  // Stop form from submitting when JavaScript is enabled
  Event.stop(e);
}

function getAddress(e) {
  // Update user interface
  $('getkey').innerHTML = 'Grabbing email addresses...';
  // Prepare query string and send AJAX request
  var hashkey = escape($F('passkey'));
  var pars = 'passkey=' + SHA256(hashkey); //hash("sha256", hashkey);
  var myAjax = new Ajax.Updater('getkey', 'include/ajaxServerList.php', {method: 'get', parameters: pars});
  // Stop form from submitting when JavaScript is enabled
  Event.stop(e);
}

function rsvp() {
	var act = 'mailto:'
	var dom='.org';
	var symb='@';
	document.location.href = act + 'rs' + 'vp' + symb + 'christ' + 'for' + 'everyone' + dom + '?subject=RSVP for BBQ';
}