Javascript Unicode 编码和反编码函数

<script language = "JavaScript">
function unicode(s){
var len=s.length;
var rs="";
for(var i=0;i<len;i++){
var k=s.substring(i,i+1);
rs+="&#"+s.charCodeAt(i)+";";
}
return rs;
}
function runicode(s){
var k=s.split(";");
var r="";
for(var x=0;x<k.length;x++){
var m=k[x].replace(/&#/,"");
r += String.fromCharCode(m);
}
return r;
}
</script>