function Questions()
{
    //PRIVATE
    var vQUESTIONS=new Array();
    function Post(URL,QUESTION)
    {
		$('#error').hide();
		
		var return_data = null;
		$.ajax({
			url: URL, 
			type: 'POST',
			data: 'QUESTION=' + QUESTION,
			success: function(data, textStatus, jqXHR) {
				return_data = data;
			},
			error: function(jqXHR, textStatus, errorThrown) {
				show_error('Error occured during data retrieval');
				throw new Error();
			}
		});

		return return_data;
    }
    function HexString(VALUE,LENGTH)
    {
        var v=VALUE.toString(16);
        while(v.length<LENGTH)
            v="0"+v;
        return v;
    }
    
    //PUBLIC
    this.Add=function(INDEX,SUBINDEX)
    {
        var vQuestion=new Question();
        vQuestion.INDEX=INDEX;
        vQuestion.SUBINDEX=SUBINDEX;
        vQUESTIONS[vQUESTIONS.length]=vQuestion;
    }
    this.getData=function(INDEX,SUBINDEX)
    {
        for(var i=0;i<vQUESTIONS.length;i++)
        {
            if((vQUESTIONS[i].INDEX==INDEX)&&(vQUESTIONS[i].SUBINDEX==SUBINDEX)) {
                return vQUESTIONS[i].getData();
			}
        }
    }
    this.SendReceive=function()
    {
		for(var idx=0;idx<vQUESTIONS.length;idx+=1000)
		{
			var vQuestionsSlice;
			if((vQUESTIONS.length-idx)<=1000)
				vQuestionsSlice=vQUESTIONS.slice(idx,vQUESTIONS.length);
			else
				vQuestionsSlice=vQUESTIONS.slice(idx,idx+1000);
			
			var vQuestions="";
			for(var iQ=0;iQ<vQuestionsSlice.length;iQ++)
				vQuestions+=HexString(vQuestionsSlice[iQ].INDEX,4)+HexString(vQuestionsSlice[iQ].SUBINDEX,2);    
			
			var vAnswers=Post("http://" + document.location.hostname + "/cgi-bin/mkv.cgi",vQuestions);

			for(var iQ=0,iA=0;iQ<vQuestionsSlice.length;iQ++)
			{
				if(vAnswers != null && vAnswers.charAt(iA)!="X")
				{
					vQuestionsSlice[iQ].setData(vAnswers.substring(iA,iA+8));
					iA+=8;
				}
				else
				{
					vQuestionsSlice[iQ].setData("X");
					iA++;
				}
			}
		}
    }
}
function Question() {
    //PRIVATE
    var vDATA=null;
    
    //PUBLIC
    this.INDEX=0;
    this.SUBINDEX=0;
    this.setData = function(DATA) {
        var vData = new Data();
        vData.DATA = DATA;
        vDATA = vData;
    }
    this.getData = function(){return vDATA;}
}
function Data() {
    this.DATA=null;

    this.UInt32=function()  {
        if(this.DATA=="X")
            throw new Error();
        return parseInt(this.DATA,16);
    }
    this.Int32=function() {
        if(this.DATA=="X")
            throw new Error();
        var v=parseInt(this.DATA,16);
        if(v>>>31)
            v=-2147483648+(v&0x7FFFFFFF);
        return v;
    }
    this.UInt16=function(WORD) {
        if(this.DATA=="X")
            throw new Error();
        return parseInt(this.DATA.substring((1-WORD)*4,(2-WORD)*4),16);
    }
    this.Int16=function(WORD) {
        if(this.DATA=="X")
            throw new Error();
        var v=parseInt(this.DATA.substring((1-WORD)*4,(2-WORD)*4),16);
        if(v>>>15)
            v=-32768+(v&0x00007FFF);
        return v;
    }
    this.Byte=function(BYTE) {
        if(this.DATA=="X")
            throw new Error();
        return parseInt(this.DATA.substring((3-BYTE)*2,(4-BYTE)*2),16);
    }
}