HTML中用JavaScript语句输出九九乘法表，格式如下： 1*1=1 1*2=2 2*2=4 1*3=3 2*3=6 3*3=9

Sure, here's the JavaScript code for printing the multiplication table:

for (let i = 1; i <= 9; i++) {
  for (let j = 1; j <= i; j++) {
    document.write(j + '*' + i + '=' + (i * j) + ' ');
  }
  document.write('<br>');
}