为什么我的这段代码没有错，怎么老是提交错误
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>数组长度</title><script language="javascript"> var mynum=new Array(65,90,88,98); document.write("数组的长度是:"+mynum.lenght );</script></head><body></body></html>
