// スタイルシートの振り分け
if( navigator.appVersion.indexOf("Mac")>1){
 if( navigator.userAgent.indexOf("Opera")!=-1){
   document.write("<link href='../common/css/mac_ie.css' rel='stylesheet' type='text/css'>"); // Operaの場合  
 }else if( navigator.appName.charAt(0)=="M"){
  document.write("<link href='../common/css/mac_ie.css' rel='stylesheet' type='text/css'>"); // IEの場合
 }else if( navigator.appVersion.charAt(0) >= 5){
  document.write("<link href='../common/css/mac_nn6.css' rel='stylesheet' type='text/css'>"); // Netscape6の場合
		}else{
  document.write("<link href='../common/css/mac_nn.css' rel='stylesheet' type='text/css'>"); // Netscapeとその他の場合
		}

} else {
 if( navigator.userAgent.indexOf("Opera")!=-1){
   document.write("<link href='../common/css/win_ie.css' rel='stylesheet' type='text/css'>"); // Operaの場合  
 }else if( navigator.appName.charAt(0)=="N"){
 		if( navigator.appVersion.charAt(0) >= 5){
		document.write("<link href='../common/css/win_nn6.css' rel='stylesheet' type='text/css'>");// Netscape5.0以上
		}else{ 
		document.write("<link href='../common/css/win_nn.css' rel='stylesheet' type='text/css'>");// Netscape5.0以下
		}
 }else{
  document.write("<link href='../common/css/win_ie.css' rel='stylesheet' type='text/css'>"); // IEとその他の場合
 }
}