function sha1(msg) {

	function rotate_left(n, s) {
		var t4 = (n << s) | (n >>> (32 - s));
		return t4;
	};

	function lsb_hex(val) {
		var str = "";
		var i;
		var vh;
		var vl;

		for (i = 0; i <= 6; i += 2) {
			vh = (val >>> (i * 4 + 4)) & 0x0f;
			vl = (val >>> (i * 4)) & 0x0f;
			str += vh.toString(16) + vl.toString(16);
		}
		return str;
	};

	function cvt_hex(val) {
		var str = "";
		var i;
		var v;

		for (i = 7; i >= 0; i--) {
			v = (val >>> (i * 4)) & 0x0f;
			str += v.toString(16);
		}
		return str;
	};


	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;
	};

	var blockstart;
	var i, j;
	var W = new Array(80);
	var H0 = 0x67452301;
	var H1 = 0xEFCDAB89;
	var H2 = 0x98BADCFE;
	var H3 = 0x10325476;
	var H4 = 0xC3D2E1F0;
	var A, B, C, D, E;
	var temp;

	msg = Utf8Encode(msg);

	var msg_len = msg.length;

	var word_array = new Array();
	for (i = 0; i < msg_len - 3; i += 4) {
		j = msg.charCodeAt(i) << 24 | msg.charCodeAt(i + 1) << 16 | msg.charCodeAt(i + 2) << 8 | msg.charCodeAt(i + 3);
		word_array.push(j);
	}

	switch (msg_len % 4) {
		case 0:
		i = 0x080000000;
		break;
		case 1:
		i = msg.charCodeAt(msg_len - 1) << 24 | 0x0800000;
		break;

		case 2:
		i = msg.charCodeAt(msg_len - 2) << 24 | msg.charCodeAt(msg_len - 1) << 16 | 0x08000;
		break;

		case 3:
		i = msg.charCodeAt(msg_len - 3) << 24 | msg.charCodeAt(msg_len - 2) << 16 | msg.charCodeAt(msg_len - 1) << 8 | 0x80;
		break;
	}

	word_array.push(i);

	while ((word_array.length % 16) != 14) word_array.push(0);

	word_array.push(msg_len >>> 29);
	word_array.push((msg_len << 3) & 0x0ffffffff);


	for (blockstart = 0; blockstart < word_array.length; blockstart += 16) {

		for (i = 0; i < 16; i++) W[i] = word_array[blockstart + i];
		for (i = 16; i <= 79; i++) W[i] = rotate_left(W[i - 3] ^ W[i - 8] ^ W[i - 14] ^ W[i - 16], 1);

		A = H0;
		B = H1;
		C = H2;
		D = H3;
		E = H4;

		for (i = 0; i <= 19; i++) {
			temp = (rotate_left(A, 5) + ((B & C) | (~B & D)) + E + W[i] + 0x5A827999) & 0x0ffffffff;
			E = D;
			D = C;
			C = rotate_left(B, 30);
			B = A;
			A = temp;
		}

		for (i = 20; i <= 39; i++) {
			temp = (rotate_left(A, 5) + (B ^ C ^ D) + E + W[i] + 0x6ED9EBA1) & 0x0ffffffff;
			E = D;
			D = C;
			C = rotate_left(B, 30);
			B = A;
			A = temp;
		}

		for (i = 40; i <= 59; i++) {
			temp = (rotate_left(A, 5) + ((B & C) | (B & D) | (C & D)) + E + W[i] + 0x8F1BBCDC) & 0x0ffffffff;
			E = D;
			D = C;
			C = rotate_left(B, 30);
			B = A;
			A = temp;
		}

		for (i = 60; i <= 79; i++) {
			temp = (rotate_left(A, 5) + (B ^ C ^ D) + E + W[i] + 0xCA62C1D6) & 0x0ffffffff;
			E = D;
			D = C;
			C = rotate_left(B, 30);
			B = A;
			A = temp;
		}

		H0 = (H0 + A) & 0x0ffffffff;
		H1 = (H1 + B) & 0x0ffffffff;
		H2 = (H2 + C) & 0x0ffffffff;
		H3 = (H3 + D) & 0x0ffffffff;
		H4 = (H4 + E) & 0x0ffffffff;

	}

	var temp = cvt_hex(H0) + cvt_hex(H1) + cvt_hex(H2) + cvt_hex(H3) + cvt_hex(H4);

	return temp.toLowerCase();

}

function inputfilter(formname, strict, inobj) {
	var formobject = document.forms[formname].elements;
	var content = formobject[inobj.name].value;
	var newcontent = content;
	if (strict == true) {
		var expression = /[^\w\d]/;
	} else {
		var expression = /[^\w\d\s.,']/;
	}

	newcontent = content.replace(expression, "");
	if (content != newcontent) {
		formobject[inobj.name].value = newcontent;
	}
}

function encryptpassword(formname, hasconfirm) {
	var formobject = document.forms[formname].elements;
	var oldpassword = formobject["passwordprehash"].value;
	var newpassword = "";

	formobject["password"].value = sha1(oldpassword + "WoWtCgLoOt");

	for (var counter = 0; counter < oldpassword.length; counter++) {
		newpassword += "*";
	}

	if (hasconfirm) {
		var conpassword = formobject["passwordconfirm"].value;
		if (oldpassword != conpassword) {
			alert("Passwords do not match");
			return false;
		}
		formobject["passwordconfirm"].value = newpassword;
	}

	formobject["passwordprehash"].value = newpassword;

	return true;
}