<!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>无标题文档</title> <style> body{ overflow: hidden; margin: 0; } </style> </head> <body> <canvas id="q"></canvas> <script> var s = window.screen; var width = q.width = s.width; var height = q.height = s.height; var letters = Array(256).join(1).split(''); var draw = function () { q.getContext('2d').fillStyle='rgba(0,0,0,.05)'; q.getContext('2d').fillRect(0,0,width,height); q.getContext('2d').fillStyle='#0F0'; letters.map(function(y_pos, index){ text = String.fromCharCode(34+Math.random()*33); // text = String.fromCharCode(3e4+Math.random()*33);//显示中文 x_pos = index * 10; q.getContext('2d').fillText(text, x_pos, y_pos); letters[index] = (y_pos > 758 + Math.random() * 1e4) ? 0 : y_pos + 10; q.getContext('2d').fillStyle='#'+letters[index]; }); }; setInterval(draw, 33); </script> </body> </html>