生成500个0-1000的随机数&&数组查找—小练习
<!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" /> <script type="text/javascript"> window.onload = function () { var obody = document.getElementsByTagName('body')[0]; for (var i = 0; i < 550; i++) { obody.innerHTML += Math.round(Math.random()*1000)+ ' '; } } </script> <title>无标题文档</title> </head> <body> </body> </html>
<!doctype html> <html> <head> <meta charset="utf-8"> <title>无标题文档</title> <script type="text/javascript"> window.onload = function () { var arr = [1,2,3,4,5,6,7,8,9]; var num = 3; alert(arr.join('').indexOf(num)); }; </script> </head> <body> </body> </html>