js输出列表实现代码_基础知识

<script> <BR>function echo_script(url){ <br><br>var USERAGENT = navigator.userAgent.toLowerCase(); <BR>var bname = ''; <BR>var b = ['ie','msie','firefox','chrome','opera','safari','maxthon','mozilla','webkit']; <BR>for(i in b){ <BR>if(USERAGENT.indexOf(b[i]) > -1){ <BR>bname = b[i]; <BR>break; <BR>} <BR>} <BR>if(!bname)bname='other'; <BR>var ie8 = USERAGENT.indexOf('msie 8') > -1 ? 'ie8' : false; <BR>var ie7 = USERAGENT.indexOf('msie 7') > -1 ? 'ie7' : false; <br><br>if(bname == 'firefox' || ie8 ) <BR>{ <BR>var enc = "no"; <BR>} <BR>if(ie8){ <BR>bname = 'ie8'; <BR>}else if(ie7){ <BR>bname = 'ie7'; <BR>} <br><br>var tmp_ie8 = ie8 ? 'ie8' : 'no_ie8'; <br><br>document.write("<script src='"+url+"&encode="+enc+"&browser="+tmp_ie8+"&browserv="+bname+"'><\/script>"); <BR>} <BR></script>