for循环
为什么for循环进不去呢 var sum=0; for(var i;i<=a.length;i++){ var b=a[i].substr("-2","2"); sum=b+sum; document.write("------"+sum.ceil()); }
为什么for循环进不去呢 var sum=0; for(var i;i<=a.length;i++){ var b=a[i].substr("-2","2"); sum=b+sum; document.write("------"+sum.ceil()); }
2016-10-14
举报