ok this should work

var applySyntaxHighlighting = (function()
{
    //find matches and add them to the list.
    var index=0;
    function find(color,regex,text,list)
    {
        while (match=regex.exec(text)){
            list.push({
                start: match.index,
                end: match.index+match[0].length,
                color: color,
                index: index++
            });
        console.log(match)
        }
    }

    //sort by lower start pos, then longer length
    function listCompare(a,b)
    {
        return a.start-b.start || b.end-a.end || a.index-b.index;
    }

    //highlight
    return function(text)
    {
        //Each highlightable word has the properties "start", "end", and "color"
        var list=[];
        //find potential things to highlight
        find([0x6B,0xBD,0xF5],/ELSEIF|ENDIF|AND|BREAK|CALL|COMMON|CONTINUE|DATA|DEC|DEF|DIM|DIV|ELSE|END|EXEC|FALSE|FOR|GOSUB|GOTO|IF|INC|INPUT|LINPUT|MOD|NEXT|NOT|ON|OUT|OR|PRINT|READ|REM|REPEAT|RESTORE|RETURN|STEP|STOP|SWAP|THEN|TO|TRUE|UNTIL|USE|VAR|WEND|WHILE|XOR/igm,text,list);
        find([0x7A,0x7C,0xF7],/ABS|ACCEL|ACLS|ACOS|ARYOP|ASC|ASIN|ATAN|ATTR|BACKCOLOR|BACKTRACE|BEEP|BGANIM|BGCHK|BGCLIP|BGCLR|BGCOLOR|BGCOORD|BGCOPY|BGFILL|BGFUNC|BGGET|BGHIDE|BGHOME|BGLOAD|BGMCHK|BGMCLEAR|BGMCONT|BGMPAUSE|BGMPLAY|BGMPRG|BGMPRGA|BGMSET|BGMSETD|BGMSTOP|BGMVAR|BGMVOL|BGOFS|BGPAGE|BGPUT|BGROT|BGSAVE|BGSCALE|BGSCREEN|BGSHOW|BGSTART|BGSTOP|BGVAR|BIN\$|BIQUAD|BREPEAT|BQPARAM|BUTTON|CALLIDX|CEIL|CHKCALL|CHKCHR|CHKFILE|CHKLABEL|CHKVAR|CHR\$|CLASSIFY|CLIPBOARD|CLS|COLOR|COPY|COS|COSH|CSRX|CSRY|CSRZ|DATE\$|DEG|DELETE|DIALOG|DISPLAY|DLCOPEN|DTREAD|EFCOFF|EFCON|EFCSET|EFCWET|ERRNUM|ERRLINE|ERRPRG|EXP|EXTFEATURE|FADE|FADECHK|FFT|FFTWFN|FILL|FILES|FLOOR|FONTDEF|FORMAT\$|FREEMEM|GBOX|GCIRCLE|GCLIP|GCLS|GCOLOR|GCOPY|GFILL|GLINE|GLOAD|GOFS|GPAGE|GPAINT|GPRIO|GPSET|GPUTCHR|GSAVE|GSPOIT|GTRI|GYROA|GYROV|GYROSYNC|HARDWARE|HEX\$|IFFT|INKEY\$|INSTR|KEY|LEFT\$|LEN|LOAD|LOCATE|LOG|MAINCNT|MAX|MICDATA|MICPOS|MICSAVE|MICSIZE|MICSTART|MICSTOP|MID\$|MILLISEC|MIN|MPCOUNT|MPEND|MPGET|MPHOST|MPLOCAL|MPNAME\$|MPRECV|MPSEND|MPSET|MPSTART|MPSTAT|OPTION|PCMCONT|PCMPOS|PCMSTOP|PCMSTREAM|PCMVOL|POW|POP|PRGDEL|PRGEDIT|PRGGET\$|PRGINS|PRGNAME\$|PRGSET|PRGSIZE|PRGSLOT|PROJECT|PUSH|RAD|RANDOMIZE|RENAME|RESULT|RGB|RGBREAD|RIGHT\$|RINGCOPY|RND|RNDF|ROUND|RSORT|SAVE|SCROLL|SGN|SHIFT|SIN|SINH|SNDSTOP|SORT|SPANIM|SPCHK|SPCHR|SPCLIP|SPCLR|SPCOL|SPCOLOR|SPCOLVEC|SPDEF|SPFUNC|SPHIDE|SPHITINFO|SPHITRC|SPHITSP|SPHOME|SPLINK|SPOFS|SPPAGE|SPROT|SPSCALE|SPSET|SPSHOW|SPSTART|SPSTOP|SPUSED|SPUNLINK|SPVAR|SQR|STICK|STICKEX|STR\$|SUBST\$|SYSBEEP|TABSTEP|TALK|TALKCHK|TALKSTOP|TAN|TANH|TIME\$|TMREAD|TOUCH|UNSHIFT|VAL|VERSON|VISIBLE|VSYNC|WAIT|WAVSET|WAVSETA|WIDTH|XOFF|XON|XSCREEN/igm,text,list);
        find([0xFF,0xFF,0xFF],/[A-Z_][A-Z0-9_]*[$%#]?/igm,text,list); //must be after keyword and function. Prevents functions/keywords from being highlighted in the middle of user variable/function names
        find([0xFF,0xFF,0xFF],/(?:\d*\.)?\d+(?=E)/igm,text,list); //must be before number. Causes numbers using E without a digit after to not be highlighted
        find([0xF6,0x7B,0xD5],/-?(?:(?:\d*\.(?:\d+(?:E-?\d+)?)?)|(?:\d+(?:E-?\d+)?))#?|&H[\dA-F]+|&B[01]+|#[A-Z\d]+/igm,text,list);
        find([0xF7,0xA6,0x00],/@[0-9A-Z_]*/igm,text,list);
        find([0xF6,0xE6,0x52],/\".*?(?:\"|$)/igm,text,list);
        find([0x10,0xB6,0x30],/'[^'\n\r]*/igm,text,list);

        //highlight the correct ones
        list=list.sort(listCompare);
        var pos=0,output=[];
        for(var i=0;i<list.length;i++)
        {
            var word=list[i];
            if (word.start>=pos) //only highlight if it's past the end of the previous keyword
            {
                output.push({
                    text: text.substring(pos,word.start),
                    color: "white"
                });
                output.push({
                    text: text.substring(word.start,word.end),
                    color: word.color
                });
                pos=word.end;
            }
        }
        output.push({
            text: text.substring(pos),
            color: "white"
        });
        return output;
    };

}) ();