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function GetMD5(s) {
    if (s == "") return s
    var x = new MD5()
    return x.MD5(s)
}

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function MD5() {
	this.hex_chr		= "0123456789abcdef"		// PRIVATE
	this.rhex			= MD5Object_rhex			// PRIVATE
	this.str2blks_MD5	= MD5Object_str2blks_MD5	// PRIVATE
	this.add			= MD5Object_add				// PRIVATE
	this.rol			= MD5Object_rol				// PRIVATE
	this.cmn			= MD5Object_cmn				// PRIVATE
	this.ff				= MD5Object_ff				// PRIVATE
	this.gg				= MD5Object_gg				// PRIVATE
	this.hh				= MD5Object_hh				// PRIVATE
	this.ii				= MD5Object_ii				// PRIVATE
	this.MD5			= MD5Object_MD5				// PUBLIC
}

// Convert a 32-bit number to a hex string with ls-byte first
function MD5Object_rhex(num) {
	var str = ""
	for (var j = 0; j <= 3; j++) {
		str += this.hex_chr.charAt((num >> (j * 8 + 4)) & 0x0F) + this.hex_chr.charAt((num >> (j * 8)) & 0x0F)
	}	
	return str;
}

// Convert a string to a sequence of 16-word blocks, stored as an array.
// Append padding bits and the length, as described in the MD5 standard.
function MD5Object_str2blks_MD5(str) {
	var nblk = ((str.length + 8) >> 6) + 1;
	var blks = new Array(nblk * 16);
	for (var i = 0; i < nblk * 16; i++) blks[i] = 0;
	for (var i = 0; i < str.length; i++) blks[i >> 2] |= str.charCodeAt(i) << ((i % 4) * 8);
	blks[i >> 2] |= 0x80 << ((i % 4) * 8);
	blks[nblk * 16 - 2] = str.length * 8;
	return blks;
}

// Add integers, wrapping at 2^32. This uses 16-bit operations internally 
// to work around bugs in some JS interpreters.
function MD5Object_add(x, y) {
var lsw = (x & 0xFFFF) + (y & 0xFFFF);
var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
	return (msw << 16) | (lsw & 0xFFFF);
}

// Bitwise rotate a 32-bit number to the left
function MD5Object_rol(num, cnt) {
	return (num << cnt) | (num >>> (32 - cnt));
}

// These functions implement the basic operation for each round of the algorithm.
function MD5Object_cmn(q, a, b, x, s, t) {
	return this.add(this.rol(this.add(this.add(a, q), this.add(x, t)), s), b);
}

function MD5Object_ff(a, b, c, d, x, s, t) {
	return this.cmn((b & c) | ((~b) & d), a, b, x, s, t);
}

function MD5Object_gg(a, b, c, d, x, s, t) {
	return this.cmn((b & d) | (c & (~d)), a, b, x, s, t);
}

function MD5Object_hh(a, b, c, d, x, s, t) {
	return this.cmn(b ^ c ^ d, a, b, x, s, t);
}

function MD5Object_ii(a, b, c, d, x, s, t) {
	return this.cmn(c ^ (b | (~d)), a, b, x, s, t);
}

// Take a string and return the hex representation of its MD5.
function MD5Object_MD5(str) {
	var x = this.str2blks_MD5(str);
	var a =  1732584193;
	var b = -271733879;
	var c = -1732584194;
	var d =  271733878;
	for (var i = 0; i < x.length; i += 16) {
		var olda = a;
		var oldb = b;
		var oldc = c;
		var oldd = d;
		a = this.ff(a, b, c, d, x[i+ 0], 7 , -680876936);
		d = this.ff(d, a, b, c, x[i+ 1], 12, -389564586);
		c = this.ff(c, d, a, b, x[i+ 2], 17,  606105819);
		b = this.ff(b, c, d, a, x[i+ 3], 22, -1044525330);
		a = this.ff(a, b, c, d, x[i+ 4], 7 , -176418897);
		d = this.ff(d, a, b, c, x[i+ 5], 12,  1200080426);
		c = this.ff(c, d, a, b, x[i+ 6], 17, -1473231341);
		b = this.ff(b, c, d, a, x[i+ 7], 22, -45705983);
		a = this.ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
		d = this.ff(d, a, b, c, x[i+ 9], 12, -1958414417);
		c = this.ff(c, d, a, b, x[i+10], 17, -42063);
		b = this.ff(b, c, d, a, x[i+11], 22, -1990404162);
		a = this.ff(a, b, c, d, x[i+12], 7 ,  1804603682);
		d = this.ff(d, a, b, c, x[i+13], 12, -40341101);
		c = this.ff(c, d, a, b, x[i+14], 17, -1502002290);
		b = this.ff(b, c, d, a, x[i+15], 22,  1236535329);    

		a = this.gg(a, b, c, d, x[i+ 1], 5 , -165796510);
		d = this.gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
		c = this.gg(c, d, a, b, x[i+11], 14,  643717713);
		b = this.gg(b, c, d, a, x[i+ 0], 20, -373897302);
		a = this.gg(a, b, c, d, x[i+ 5], 5 , -701558691);
		d = this.gg(d, a, b, c, x[i+10], 9 ,  38016083);
		c = this.gg(c, d, a, b, x[i+15], 14, -660478335);
		b = this.gg(b, c, d, a, x[i+ 4], 20, -405537848);
		a = this.gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
		d = this.gg(d, a, b, c, x[i+14], 9 , -1019803690);
		c = this.gg(c, d, a, b, x[i+ 3], 14, -187363961);
		b = this.gg(b, c, d, a, x[i+ 8], 20,  1163531501);
		a = this.gg(a, b, c, d, x[i+13], 5 , -1444681467);
		d = this.gg(d, a, b, c, x[i+ 2], 9 , -51403784);
		c = this.gg(c, d, a, b, x[i+ 7], 14,  1735328473);
		b = this.gg(b, c, d, a, x[i+12], 20, -1926607734);
		    
		a = this.hh(a, b, c, d, x[i+ 5], 4 , -378558);
		d = this.hh(d, a, b, c, x[i+ 8], 11, -2022574463);
		c = this.hh(c, d, a, b, x[i+11], 16,  1839030562);
		b = this.hh(b, c, d, a, x[i+14], 23, -35309556);
		a = this.hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
		d = this.hh(d, a, b, c, x[i+ 4], 11,  1272893353);
		c = this.hh(c, d, a, b, x[i+ 7], 16, -155497632);
		b = this.hh(b, c, d, a, x[i+10], 23, -1094730640);
		a = this.hh(a, b, c, d, x[i+13], 4 ,  681279174);
		d = this.hh(d, a, b, c, x[i+ 0], 11, -358537222);
		c = this.hh(c, d, a, b, x[i+ 3], 16, -722521979);
		b = this.hh(b, c, d, a, x[i+ 6], 23,  76029189);
		a = this.hh(a, b, c, d, x[i+ 9], 4 , -640364487);
		d = this.hh(d, a, b, c, x[i+12], 11, -421815835);
		c = this.hh(c, d, a, b, x[i+15], 16,  530742520);
		b = this.hh(b, c, d, a, x[i+ 2], 23, -995338651);

		a = this.ii(a, b, c, d, x[i+ 0], 6 , -198630844);
		d = this.ii(d, a, b, c, x[i+ 7], 10,  1126891415);
		c = this.ii(c, d, a, b, x[i+14], 15, -1416354905);
		b = this.ii(b, c, d, a, x[i+ 5], 21, -57434055);
		a = this.ii(a, b, c, d, x[i+12], 6 ,  1700485571);
		d = this.ii(d, a, b, c, x[i+ 3], 10, -1894986606);
		c = this.ii(c, d, a, b, x[i+10], 15, -1051523);
		b = this.ii(b, c, d, a, x[i+ 1], 21, -2054922799);
		a = this.ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
		d = this.ii(d, a, b, c, x[i+15], 10, -30611744);
		c = this.ii(c, d, a, b, x[i+ 6], 15, -1560198380);
		b = this.ii(b, c, d, a, x[i+13], 21,  1309151649);
		a = this.ii(a, b, c, d, x[i+ 4], 6 , -145523070);
		d = this.ii(d, a, b, c, x[i+11], 10, -1120210379);
		c = this.ii(c, d, a, b, x[i+ 2], 15,  718787259);
		b = this.ii(b, c, d, a, x[i+ 9], 21, -343485551);

		a = this.add(a, olda);
		b = this.add(b, oldb);
		c = this.add(c, oldc);
		d = this.add(d, oldd);
	}
	return this.rhex(a) + this.rhex(b) + this.rhex(c) + this.rhex(d);
}
 
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