键盘上一张下一张兼容IE/google/firefox等浏览器

< script language = "javascript" > 
document.onkeydown = chang_page; 
function chang_page(event) { 
var event = event ? event : (window.event ? window.event : null); 
var key = event.keyCode || event.which; 
if (key == 37 || key == 33) 
location = ''; 
if (key == 39 || key == 34) 
location = ''; 
} 
< / script > 
 
兼容IE，google，firefox的键盘上一张下一张