js输出列表实现代码

数据库用UTF-8，现有系统用gb2312,

用<script>echo_script(url);</script>

<script> 
function echo_script(url){ 

var USERAGENT = navigator.userAgent.toLowerCase(); 
var bname = ''; 
var b = ['ie','msie','firefox','chrome','opera','safari','maxthon','mozilla','webkit']; 
for(i in b){ 
if(USERAGENT.indexOf(b[i]) > -1){ 
bname = b[i]; 
break; 
} 
} 
if(!bname)bname='other'; 
var ie8 = USERAGENT.indexOf('msie 8') > -1 ? 'ie8' : false; 
var ie7 = USERAGENT.indexOf('msie 7') > -1 ? 'ie7' : false; 

if(bname == 'firefox' || ie8 ) 
{ 
var enc = "no"; 
} 
if(ie8){ 
bname = 'ie8'; 
}else if(ie7){ 
bname = 'ie7'; 
} 

var tmp_ie8 = ie8 ? 'ie8' : 'no_ie8'; 

document.write("<script src='"+url+"&encode="+enc+"&browser="+tmp_ie8+"&browserv="+bname+"'></script>"); 
} 
</script> 

哎，这种方法，导致在不同的浏览器下乱码不断，害苦我了。
有更简单的办法

<script type="text/javascript" charset="utf-8" src="xx.com/xx.php"></script>
乱码从此不再出现！