Lesson5Homework1

function chessDraw(n){
    document.write("<table>");
    var chars = ['A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'];
    for(i = 0; i<n+1; i++){
        document.write("<tr>");
        for(j = 0; j<n+1;j++){
            if(i==n && j==n){}
            else if(j==n){
                if(n<27){
                    document.write("<td class='isNumOrChar'>"+chars[i]+"</td>");
                }
                else{
                    document.write("<td class='isNumOrChar'>");
                    for(k=Math.ceil(Math.log(n)/Math.log(26));k>0;k--){
                        document.write(chars[Math.ceil(i*j/Math.pow(26,k))]);
                    }
                    document.write("</td>");
                }
            }
            else if(i==n){
            document.write("<td class='isNumOrChar'>"+(j+1)+"</td>");
            }
            else if(i%2==0 && j%2==1){
                document.write("<td class='isBlack'></td>");
            }
            else if(i%2==1 && j%2==0){
                document.write("<td class='isBlack'></td>");
            }
            else{
                document.write("<td class='isWhite'></td>");
            }
        }
        document.write("</tr>");
    }
    document.write("</table>");
}