摘要： 1. 五大浏览器判断<script type="text/javascript"> var Sys = {}; var ua = navigator.userAgent.toLowerCase(); var s; (s = ua.match(/msie ([\d.]+)/))? Sys.ie = s[1]: (s = ua.match(/firefox\/([\d.]+)/))? Sys.firefox= s[1]: (s = ua.match(/chrome\/([\d.]+)/))? Sys.... 阅读全文