//author : guiyj (evan_gui@163.com) on 2009.01.04
var gCurPageUrl = window.location.href;
var gSiteSurfix = document.location.host.substr(document.location.host.length-3, 3);	
var gUcSiteUrl  = "http://accounts.mmosite." + gSiteSurfix + "/";					//mmosite用户中心站点地址
var gSvcUrl     = gUcSiteUrl + "port/js_svc.php?1";									//php脚本服务器端服务请求处理url
var gPmTo       = null;
var gSaveoutbox  = null;
//----------------------------------------------------------------------
//    1. login
//----------------------------------------------------------------------

//processing mmosite ucenter login 
function mmoUcLoginUser() {
	var url = gSvcUrl; 
	var mmoUcUsername = document.getElementById('mmoUcUsername').value.trim();
	var mmoUcPassword = document.getElementById('mmoUcPassword').value.trim();
	if ('' == mmoUcUsername) {
		document.getElementById('loginResMsg').style.display = "block";
		document.getElementById('loginResMsg').innerHTML = '<font color="red">Please input your username!</font>';
		return false;
	}
	if ('' == mmoUcPassword) {
		document.getElementById('loginResMsg').style.display = "block";
		document.getElementById('loginResMsg').innerHTML = '<font color="red">Please input your password!</font>';
		return false;
	}
	url += '&action=login&u=' + mmoUcUsername + '&p=' + mmo_hhp(mmoUcPassword) + '&r=' + document.getElementById('is_remember').checked + '&s=' + (new Date()).getTime();
	
	requestSvc('bookmarkJs', url, 'processLoginRes');
	return false;
}

//callback func of logging in ucenter
function processLoginRes(s) {
	var _t = s.split('|');
	s = _t[0];
	eval("var oJson = " + s + ";");
	var result = oJson.result;
	//alert(result);
	switch (result) {
		case 'success': 
			onMmoUcLoginSuccess();

			//dynamicly write request script string...
			startSynLogin(_t[1]);

//			var loginScriptStrDiv = document.createElement("div");
//			loginScriptStrDiv.id = "loginScriptStrDiv";
//			loginScriptStrDiv.innerHTML = _t[1];
//			document.body.appendChild(loginScriptStrDiv);
			break;
		case 'username_empty': 
			showMmoLoginRes("Please input your username!");
			break;
		case 'passwd_empty': 
			showMmoLoginRes("Please input your password!");
			break;
		case 'user_not_exist':
			showMmoLoginRes("This user do not exist!");
			break;
		case 'passwd_error': 
			showMmoLoginRes("Password error!");
			break;
		default : 
			break;
	}
	return false;
}

//synlogin processing of other sites.
function startSynLogin(_in) {
	var _middle = /"><\/script><script type="text\/javascript" src="/g;  
	var _head = /<script type="text\/javascript" src="/g;  
	var _tail = /"><\/script>/g;
	var _sScript = _in.replace(_middle, '|').replace(_tail, '').replace(_head, '');
	var _a = _sScript.split('|');
	var _l = _a.length;
	for (var i=0; i<_l; i++) {
		requestSvc('l'+i, _a[i]);
	}
	return;
}

function showMmoLoginRes(msg, warm) {
	if ('undefined' == typeof(warm)) {
		warm = true;
	}
	var obb = document.getElementById('loginResMsg');
	document.getElementById('loginResMsg').style.display = "block";
	if (warm) {
		obb.innerHTML = '<font color="red">' + msg + '</font>';
	} else {
		obb.innerHTML = '<font color="green">' + msg + '</font>';
		document.getElementById('loginResMsg').style.background = "none";
	}
}

//
function onMmoUcLoginSuccess() {
//	$('#script_container').html(oJson.scriptStr);
	showMmoLoginRes('Login success! Please wait...', false);
	setTimeout("closeMmoLoginDiv()", 2000);
	setTimeout("showSendPmPannel(gPmTo)", 2200);
	
}

function closeMmoLoginDiv() {
	document.getElementById('mmoLoginDiv').style.display = 'none';
}

//show mmosite ucenter login div
function mmopm_showMmoLoginDiv() {
	try{
		var inner = '';
		var oLoginDiv = document.getElementById('mmoLoginDiv');

		var pmwidth  = 300;		//应该作为参数传入的
		var pmheight = 300;		//应该作为参数传入的

		if (!oLoginDiv) {
			inner += '<div class="account_winbox_bg" id="account_winbox_bg"></div><div class="account_winbox_main" id="account_winbox_main"><div class="account_winbox_close" title="click to close" onclick="closeMmoLoginDiv();"></div><form method="" action="" onSubmit="return mmoUcLoginUser();">';
			inner += '<div class="win_tit">Login</div><div class="win_con"><table width="100%" border="0" cellspacing="0" cellpadding="0">';
			
			inner += '<td colspan="2" class="notice">';
			inner += '<span id="loginResMsg" style="display:none"></span></td>';
			inner += '<tr>';
			inner += '<td colspan="2">Username:<br /> <input id="mmoUcUsername" name="mmoUcUsername" class="input_1" style="width:220px"/></td>';
			inner += '</tr>';
			inner += '<tr>';
			inner += '<td colspan="2">Password:<br /><input id="mmoUcPassword" name="mmoUcPassword" type="password" class="input_1" style="width:120px"/>&nbsp;&nbsp;<a href="http://accounts.mmosite.com/port/psw.php">Forgot password?</a></td>';
			inner += '</tr>';
			inner += '<tr>';
			inner += '<td colspan="2"><input type="checkbox" id="is_remember" name="is_remember">Remember me </br>';
			inner += '</td>';
			inner += '</tr>';
			inner += '<tr>';
			inner += '<td colspan="2" align="center"><input name="submit" type="submit" value="Login" title="Sign in" class="btn_yellow">&nbsp;<input name="submit" type="submit" value="Cancel" onclick="closeMmoLoginDiv();" class="btn_gray"></td>';
			inner += '</tr>';
			inner += '<tr>';
			inner += '<td colspan="2"><a href="http://accounts.mmosite.com/port/reg.php" target="_blank">First here? Sign up</a></td>';
			inner += '</tr>';
			inner += '<div id="scriptStrDiv"></div>';
			inner += '</tr>';
			inner += '</table>';
			inner += '</form><div class="clear"></div></div>';

			var clientWidth = document.body.clientWidth;

			oLoginDiv = document.createElement("div");
			oLoginDiv.id = "mmoLoginDiv";
			oLoginDiv.style.width = pmwidth + 'px';
			oLoginDiv.style.height = pmheight + 'px';
			oLoginDiv.style.left = ((clientWidth - pmwidth) / 2) + 'px';
			oLoginDiv.style.top  = getDialogLoc('', pmheight).topPos + 'px';
			oLoginDiv.style.position = 'absolute';
			oLoginDiv.className = "account_winbox";
			oLoginDiv.style.zIndex = '999';

			document.body.appendChild(oLoginDiv);
			oLoginDiv.innerHTML = inner;
			
			document.getElementById("account_winbox_bg").style.width = pmwidth + "px";
			document.getElementById("account_winbox_bg").style.height = pmheight + "px";
			if(document.compatMode == "BackCompat" && navigator.userAgent.indexOf("MSIE")>0){
				
				document.getElementById("account_winbox_main").style.width = pmwidth - 20 + "px";
			}else{
				document.getElementById("account_winbox_main").style.width = pmwidth - 40 + "px";
			}
			
			document.getElementById("account_winbox_main").style.height = pmheight - 20 + "px";
			oLoginDiv.style.display = 'block';	

		} else {

			oLoginDiv.style.top  = getDialogLoc('', pmheight).topPos + 'px';
			oLoginDiv.style.display = 'block';	
		}
//		oBookmarkDiv.innerHTML = inner;

	}catch( err ){
		alert( "bookmark.js:showCatsDiv" + " | " + err.description );
	}
}
//----------------------------------------------------------------------
//    2. 
//----------------------------------------------------------------------

// detect loged user's info.
//  (in fact we just need to fetch bookmark categores from server)
function mmoSendPm(_to) {
	try{
		url   = gSvcUrl + '&action=get_userinfo&simple=1&s=' + (new Date()).getTime();
		gPmTo = _to;
		requestSvc('pmJs', url, 'callbackMmoSendPm');
	}catch( err ){
		alert( "mmouc_pm.js:mmoSendPm" + " | " + err.description );
	}

}

// callbakc func of showMmoUserInfo
// - if logged in, then show loged user's info div; else show login url
function callbackMmoSendPm(s) {
	var sJson = s.toString();
	eval("var oJson = " + sJson + ";");
	var res = oJson.result.trim();
	if ('not_logged' == res) {
		//未登陆
		mmopm_showMmoLoginDiv();
		//var _signInUrl = gUcSiteUrl + 'port/login.php?url=' + gCurPageUrl;
		//window.location.href = _signInUrl;
		return;
	} else if ('success' == res) {
		//
		showSendPmPannel(gPmTo);
	} else {

		alert('error occured');
	}
}


//已登陆的用户: 显示发送短消息的面板
function showSendPmPannel(_to) {
	try{
		var inner = '';
		var oPmPannel = document.getElementById('mmo__SendPmDiv');

		var pmwidth2  = 500;		//应该作为参数传入的
		var pmheight2 = 370;		//应该作为参数传入的

		if (!oPmPannel) {
			inner = '<div class="account_winbox_bg" id="account_winbox_bg2"></div><div class="account_winbox_main" id="account_winbox_main2"><div class="account_winbox_close" title="click to close" onclick="closeMmoSendPmPannel();"></div><form method="post" action="" onsubmit="return processSendPm(0);"><div class="win_tit">Send pm</div><div class="win_con">';
			
			inner +=	'Message title:</br>';
			inner +=	'<input type="text" id="mmo_PmTitle" name="mmo_PmTitle"/></br>';
			inner +=	'Receiver:</br>';
			inner +=	 '<input type="text" id="mmo_PmReceiver" name="mmo_PmReceiver" value="' + _to + '"/></br>';
			inner +=	'Content:</br>';
			inner +=	'<textarea id="mmo_PmContent" name="mmo_PmContent" rows="5" cols="50"></textarea></br>';
			inner +=	'<input type="submit" value="Send" id="" class="btn_yellow"/> ';
			inner +=	'&nbsp; &nbsp; <a href="#" onclick="processSendPm(1);">Save in draft box </a>&nbsp; &nbsp;<a href="http://accounts.mmosite.com/user/index.php?m=pm_client&a=ls&folder=savebox" target="_blank">Draft box</a>';
			inner +=	'</br> ';
			inner +=	'<span id="mmo_pmMsg" class="" style="display:none; width:370px;margin-top:4px"></span>';
			inner += '</form><div class="clear"></div></div>';

			var clientWidth = document.body.clientWidth;

			oPmPannel = document.createElement("div");
			oPmPannel.id = "mmo__SendPmDiv";
			oPmPannel.style.width = pmwidth2 + 'px';
			oPmPannel.style.height = pmheight2 + 'px';
			oPmPannel.style.left = ((clientWidth - pmwidth2) / 2) + 'px';
			oPmPannel.style.top  = getDialogLoc('', pmheight2).topPos + 'px';
			oPmPannel.style.position = 'absolute';
			oPmPannel.className = "account_winbox";
			oPmPannel.style.zIndex = '999';

			document.body.appendChild(oPmPannel);
			oPmPannel.innerHTML = inner;
			
			document.getElementById("account_winbox_bg2").style.width = pmwidth2 + "px";
			document.getElementById("account_winbox_bg2").style.height = pmheight2 + "px";
			if(document.compatMode == "BackCompat" && navigator.userAgent.indexOf("MSIE")>0){
				
				document.getElementById("account_winbox_main2").style.width = pmwidth2 - 20 + "px";
			}else{
				document.getElementById("account_winbox_main2").style.width = pmwidth2 - 40 + "px";
			}
			document.getElementById("account_winbox_main2").style.height = pmheight2 - 20 + "px";
			
			oPmPannel.style.display = 'block';	

		} else {
			document.getElementById('mmo_PmTitle').value = '';
			document.getElementById('mmo_PmContent').value = '';
			document.getElementById('mmo_PmReceiver').value = _to;

			showMmoPmTip('');
			oPmPannel.style.top  = getDialogLoc('', pmheight2).topPos + 'px';
			oPmPannel.style.display = 'block';	
		}
//		oBookmarkDiv.innerHTML = inner;

	}catch( err ){
		alert( "mmouc_pm.js:showSendPmPannel" + " | " + err.description );
	}
}

function closeMmoSendPmPannel() {
	document.getElementById('mmo__SendPmDiv').style.display = 'none';
}

function processSendPm(saveoutbox) {
	try{
		var _to = document.getElementById('mmo_PmReceiver').value.trim();
		var _title = document.getElementById('mmo_PmTitle').value.trim();
		var _content = document.getElementById('mmo_PmContent').value.trim();
		if ('' == _to || '' == _content) {
			showMmoPmTip('Receiver and content must be filled!');
			return false;
		}

		if (_content.length > 1024) {
			showMmoPmTip('Message content must be less 1024 charactars!');
			return false;
		}

		gPmTo = _to;					//改变接受者全局变量
		gSaveoutbox = saveoutbox;		//保存到发件箱的全局变量

		url   = gSvcUrl + '&action=sendpm';
		url += '&to=' + _to;
		url += '&title=' + _title;
		url += '&content=' + _content;
		url += '&saveoutbox=' + saveoutbox;
		url += '&s=' + (new Date()).getTime();
		requestSvc('pmJs', url, 'callbackProcessSendPm');
		return false;
	}catch( err ){
		alert( "mmouc_pm.js:processSendPm" + " | " + err.description );
	}

}

function callbackProcessSendPm(s) {
	var sJson = s.toString();
	eval("var oJson = " + sJson + ";");
	var res = oJson.result.trim();
	if ('not_logged' == res) {
		//未登陆
		var _signInUrl = gUcSiteUrl + 'port/login.php?url=' + gCurPageUrl;
		window.location.href = _signInUrl;
		return;
	} else if ('success' == res) {
		//
		var _msg = (1 == gSaveoutbox) ? 'Save message success!' : 'Send message to ' + gPmTo + ' success!';
		showMmoPmTip(_msg, false);
		setTimeout("closeMmoSendPmPannel()", 2000);
	} else {
		showMmoPmTip('Sorry! Error occured while sending message!');
	}
	return;
}

function showMmoPmTip(msg, warm) {
	if ('undefined' == typeof(warm)) {
		warm = true;
	}
	var obb = document.getElementById('mmo_pmMsg');
	document.getElementById('mmo_pmMsg').style.display = "block";
	if (warm) {
		obb.innerHTML = '<font color="red">' + msg + '</font>';
	} else {
		obb.innerHTML = '<font color="green">' + msg + '</font>';
		document.getElementById('mmo_pmMsg').style.background = "none";
		document.getElementById('mmo_pmMsg').style.padding = "0";
	}
}



//----------------------------------------------------------------------
//    3. common functions
//----------------------------------------------------------------------

//defautl callback function
function callbackFunc(s) { }

String.prototype.trim = function() {
	return this.replace(/(^\s*)|(\s*$)/g, '');
}


function requestSvc(id, url, funcName) {
	if (typeof(funcName) == 'undefined') { funcName = 'callbackFunc'; } 
	url += (url.indexOf('?') == -1) ? '?func_name=' + funcName : '&func_name=' + funcName;
	oScript = document.getElementById(id);
	var head = document.getElementsByTagName("head").item(0);
	if (oScript) {
		head.removeChild(oScript);
	}
	oScript = document.createElement("script");
	oScript.setAttribute("src", url);
	oScript.setAttribute("id",id);
	oScript.setAttribute("type","text/javascript");
	oScript.setAttribute("language","javascript");

	head.appendChild(oScript);
	return oScript;
}


//even i do not know what is it(^_^)
function mmo_hhp(hhp) {
	return mmo_hh(hhp.toLowerCase().trim());
}

function getDialogLoc(t_DiglogW, t_DiglogH) {
	var dde = document.documentElement;
	if (window.innerWidth) {
	  var ww = window.innerWidth;
	  var wh = window.innerHeight;
	  var bgX = window.pageXOffset;
	  var bgY = window.pageYOffset;
	} else {
	  var ww = dde.offsetWidth;
	  var wh = dde.offsetHeight;
	  var bgX = dde.scrollLeft;
	  var bgY = dde.scrollTop ? dde.scrollTop : document.body.scrollTop;
	}
	return {
		leftPos:(bgX + ((ww - t_DiglogW)/2)),
		topPos:t_DiglogY = (bgY + ((wh - t_DiglogH)/2))
	}
}


//----------------------------------------------------------------------------------
/*
 * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
 * Digest Algorithm, as defined in RFC 1321.
 * Version 2.1 Copyright (C) Paul Johnston 1999 - 2002.
 * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
 * Distributed under the BSD License
 * See http://pajhome.org.uk/crypt/md5 for more info.
 */

/*
 * Configurable variables. You may need to tweak these to be compatible with
 * the server-side, but the defaults work in most cases.
 */
var hexcase = 0;  /* hex output format. 0 - lowercase; 1 - uppercase        */
var b64pad  = ""; /* base-64 pad character. "=" for strict RFC compliance   */
var chrsz   = 8;  /* bits per input character. 8 - ASCII; 16 - Unicode      */

/*
 * These are the functions you'll usually want to call
 * They take string arguments and return either hex or base-64 encoded strings
 */
function mmo_hh(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));}
function b64_md5(s){ return binl2b64(core_md5(str2binl(s), s.length * chrsz));}
function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));}
function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); }
function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); }
function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); }

/*
 * Perform a simple self-test to see if the VM is working
 */
function md5_vm_test()
{
  return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72";
}

/*
 * Calculate the MD5 of an array of little-endian words, and a bit length
 */
function core_md5(x, len)
{
  /* append padding */
  x[len >> 5] |= 0x80 << ((len) % 32);
  x[(((len + 64) >>> 9) << 4) + 14] = len;

  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 = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
    d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
    c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
    b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
    a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
    d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
    c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
    b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
    a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
    d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
    c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
    b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
    a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
    d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
    c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
    b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);

    a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
    d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
    c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
    b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
    a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
    d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
    c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
    b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
    a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
    d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
    c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
    b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
    a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
    d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
    c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
    b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);

    a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
    d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
    c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
    b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
    a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
    d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
    c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
    b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
    a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
    d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
    c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
    b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
    a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
    d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
    c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
    b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);

    a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
    d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
    c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
    b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
    a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
    d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
    c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
    b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
    a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
    d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
    c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
    b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
    a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
    d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
    c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
    b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);

    a = safe_add(a, olda);
    b = safe_add(b, oldb);
    c = safe_add(c, oldc);
    d = safe_add(d, oldd);
  }
  return Array(a, b, c, d);

}

/*
 * These functions implement the four basic operations the algorithm uses.
 */
function md5_cmn(q, a, b, x, s, t)
{
  return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
}
function md5_ff(a, b, c, d, x, s, t)
{
  return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
}
function md5_gg(a, b, c, d, x, s, t)
{
  return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
}
function md5_hh(a, b, c, d, x, s, t)
{
  return md5_cmn(b ^ c ^ d, a, b, x, s, t);
}
function md5_ii(a, b, c, d, x, s, t)
{
  return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
}

/*
 * Calculate the HMAC-MD5, of a key and some data
 */
function core_hmac_md5(key, data)
{
  var bkey = str2binl(key);
  if(bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz);

  var ipad = Array(16), opad = Array(16);
  for(var i = 0; i < 16; i++)
  {
    ipad[i] = bkey[i] ^ 0x36363636;
    opad[i] = bkey[i] ^ 0x5C5C5C5C;
  }

  var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
  return core_md5(opad.concat(hash), 512 + 128);
}

/*
 * Add integers, wrapping at 2^32. This uses 16-bit operations internally
 * to work around bugs in some JS interpreters.
 */
function safe_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 bit_rol(num, cnt)
{
  return (num << cnt) | (num >>> (32 - cnt));
}

/*
 * Convert a string to an array of little-endian words
 * If chrsz is ASCII, characters >255 have their hi-byte silently ignored.
 */
function str2binl(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) << (i%32);
  return bin;
}

/*
 * Convert an array of little-endian words to a string
 */
function binl2str(bin)
{
  var str = "";
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < bin.length * 32; i += chrsz)
    str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
  return str;
}

/*
 * Convert an array of little-endian words to a hex string.
 */
function binl2hex(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] >> ((i%4)*8+4)) & 0xF) +
           hex_tab.charAt((binarray[i>>2] >> ((i%4)*8  )) & 0xF);
  }
  return str;
}

/*
 * Convert an array of little-endian words to a base-64 string
 */
function binl2b64(binarray)
{
  var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i += 3)
  {
    var triplet = (((binarray[i   >> 2] >> 8 * ( i   %4)) & 0xFF) << 16)
                | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
                |  ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
    for(var j = 0; j < 4; j++)
    {
      if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
      else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
    }
  }
  return str;
}