//----------------------------------------------------------------------------保留自学习
function ReCreateCodeStr(OldStr,NewStr)
{
	var KeyNum=0;
	var PreCodeLen,PostCodeLen,Offset=0;
	var IsDefined=false;
	var LearnKey = parseInt("0x80");
	var OldKey,OldKeyTemp,NewKey;
	var IndexStr="";
	var CodeStr="";
	if(!CheckValidCodeStr(OldStr)) return NewStr;
	var OldKeyNum = parseInt("0x"+OldStr.substr(0,2));
	var NewKeyNum = parseInt("0x"+NewStr.substr(0,2));
	//保留自学习键。
	for(var i=0;i<OldKeyNum;i++)
	{
		OldKey = OldStr.substr(2+14*i,2)
		if(parseInt("0x"+OldKey)<LearnKey) continue; //定义键。
		//自学习键
		IsDefined=false;
		OldKeyTemp = GetKeyNumberStr(OldKey);
		for(var ii=0;ii<NewKeyNum;ii++)
		{
			NewKey = NewStr.substr(2+14*ii,2)
			if(NewKey == OldKeyTemp)
			{
				IsDefined=true;
				break;
			}
		}
		if(IsDefined) continue; //原来是自学习键，现在已经被定义。
		//原来是自学习键，现在没有被定义，则保留原来自学习键。
		KeyNum++;
		PreCodeLen = GetKeyPreCodeLength(OldStr,i);
		//键码＋偏移＋长度
		IndexStr+=OldKey+"#"+toHex(Offset,4)+"#"+toHex(PreCodeLen,2);
		Offset += PreCodeLen;
		PostCodeLen = GetKeyPostCodeLength(OldStr,i);
		//偏移＋长度
		IndexStr+="#"+toHex(Offset,4)+"#"+toHex(PostCodeLen,2);
		Offset += PostCodeLen;
		//编码
		CodeStr += GetKeyCodeStr(OldStr,i);
	}
	//document.all("TextBox1").value = IndexStr+" " +CodeStr;
	//alert("study"+document.all("TextBox1").value);
	//加入网上定义的键。
	for(var k=0;k<NewKeyNum;k++)
	{
		NewKey = NewStr.substr(2+14*k,2)
		KeyNum++;
		PreCodeLen = GetKeyPreCodeLength(NewStr,k);
		//键码＋偏移＋长度
		IndexStr+=NewKey+"#"+toHex(Offset,4)+"#"+toHex(PreCodeLen,2);
		Offset += PreCodeLen;
		PostCodeLen = GetKeyPostCodeLength(NewStr,k);
		//偏移＋长度
		IndexStr+="#"+toHex(Offset,4)+"#"+toHex(PostCodeLen,2);
		Offset += PostCodeLen;
		//编码
		//alert(GetKeyCodeStr(NewStr,k));
		CodeStr += GetKeyCodeStr(NewStr,k);
		//alert(CodeStr);
		//document.all("TextBox1").value = IndexStr+" " +CodeStr;
		//alert("down"+document.all("TextBox1").value);
	}
	return CompStr(IndexStr,CodeStr,KeyNum);
}
//验证读出来的代码串是否有效
function CheckValidCodeStr(CodeStr)
{
	var StrLength = CodeStr.length;
	if(StrLength < 2) return false;
	var KeyNum = parseInt("0x"+CodeStr.substr(0,2));
	var IndexLen = (1 + KeyNum*7)*2;
	if(StrLength < IndexLen) return false;
	var OffsetL = CodeStr.substr((1+7*(KeyNum-1))*2+8,2);
	var OffsetH = CodeStr.substr((1+7*(KeyNum-1))*2+10,2);
	var Offset = parseInt("0x"+OffsetH+OffsetL)*2;
	var CodeLen = GetKeyPostCodeLength(CodeStr,KeyNum-1)*2;
	if(StrLength < Offset+CodeLen) return false;
	return true;
}
function CompStr(IndexStr,CodeStr,KeyNum)
{
	IndexStr = toHex(KeyNum,2) + IndexStr;
	var IndexLen = 1 + KeyNum*7;
	var StartIndex;
	var a,Heigh,Low,Offset,HexOffset;
	var r = new RegExp("#[a-zA-Z0-9]{4}#","ig");
	var arr = IndexStr.match(r);
	for(var i=0;i<arr.length;i++)
	{
		a=arr[i];
		Offset = parseInt("0x"+a.substr(1,4)) + IndexLen;
		HexOffset = toHex(Offset,4);
		Heigh = HexOffset.substr(0,2);
		Low = HexOffset.substr(2,2);
		HexOffset = Low+Heigh;
		StartIndex = IndexStr.indexOf(a,0);
		IndexStr = IndexStr.substr(0,StartIndex) + HexOffset + IndexStr.substr(StartIndex+6,IndexStr.length-StartIndex-6)
	}
	return IndexStr + CodeStr;
}
function GetKeyPreCodeLength(Str,Num)
{
	PreCodeLen = Str.substr(8+14*Num,2);
	return parseInt("0x"+PreCodeLen);
}
function GetKeyPostCodeLength(Str,Num)
{
	PostCodeLen = Str.substr(14+14*Num,2);
	return parseInt("0x"+PostCodeLen);
}
function GetKeyCodeStr(Str,Num)
{
	var OffsetH,OffsetL;
	var Offset,CodeLen;
	var CodeStr;
	OffsetL = Str.substr(4+14*Num,2);
	OffsetH = Str.substr(6+14*Num,2);
	Offset = parseInt("0x"+OffsetH+OffsetL)*2;
	CodeLen = GetKeyPreCodeLength(Str,Num)*2+GetKeyPostCodeLength(Str,Num)*2;
	CodeStr = Str.substr(Offset,CodeLen);
	return CodeStr;
}
function GetKeyNumberStr(KeyCode)
{
	var LearnKey = parseInt("0x80");
	var KeyNum = parseInt("0x"+KeyCode);
	if(KeyNum<LearnKey) return KeyCode;
	return toHex(KeyNum-LearnKey,2);
}
function GetLearnKeyStr(KeyCode)
{
	var LearnKey = parseInt("0x80");
	var KeyNum = parseInt("0x"+KeyCode);
	if(KeyNum>LearnKey) return KeyCode;
	return toHex(KeyNum+LearnKey,2);
}
function toHex(Num,Digit)
{
	var HexNum = Num.toString(16);
	while(HexNum.length<Digit)
	{
		HexNum = "0"+HexNum;
	}
	return HexNum.toUpperCase();
}