js动态调用CSS文件代码

<script type="text/网页特效" language="网页特效">
var _sn = ["df/common", "df/home2010"];
var _su = "http://www.111cn.net/skin/";
var swidth = screen.width; var _se, _st;
for (i in _sn) {
_se = document.createelement("link");
_se.type = "text/css教程";
_se.rel = "stylesheet";
if (swidth >= 1280) {
_st = _su + _sn[i] + ".w.css";
} else {
_st = _su + _sn[i] + ".css";
}
_se.href = _st;
document.getelementsbytagname("head")[0].appendchild(_se);
}
</script>