//通常ＪＳ

//ブラウザ別ＣＳＳ

//IE
var winie = "./css/common.css";
//NS
var ns6 = "./css/common_ns.css";
//それ以外
var other = "./css/common.css";

var cssfile;
if((document.all) && (navigator.userAgent.indexOf("Win") >= 0)){
	cssfile = winie;
}else if(document.getElementById){
	cssfile = ns6;
}else{
	cssfile = other;
}

document.write('<LINK REL=stylesheet HREF="'+ cssfile +'" TYPE="text/css">');