js循环99乘法口诀

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<body>
<script>
var i,j,z;
    for(i=1;i<10;i++){
        for(j=1;j<=i;j++){
           document.write( j+"*"+i+"="+(i*j));
           if(j!=i){
               document.write('    ')
           }
       };
            document.write('<br/><br/>')
   };
</script>
</body>
</head>

</html>