for (var a=9; a<=9&&a>=1;a--) { for (var j=1; j<=a;j++) { document.write(j + "*" + a + "=" + a * j +";" +" ") } document.write("<br/>") }
for循环九九乘法表
原文：https://www.cnblogs.com/Gwaith/p/14956091.html
