// css for each useragent

if     (navigator.userAgent.indexOf('MSIE 7.0') > 0)
{ // MSIE 7.0 ------------------------------------
	document.write('<link rel="stylesheet" href="./common/css/top_ie7.css" type="text/css" />');
}
else if(navigator.userAgent.indexOf('Firefox') > 0)
{ // Firefox2.0 ----------------------------------
	document.write('<link rel="stylesheet" href="./common/css/top_firefox2.css" type="text/css" />');
}
else if(navigator.userAgent.indexOf('MSIE 6.0') > 0)
{ // MSIE 6.0 ------------------------------------
	document.write('<link rel="stylesheet" href="./common/css/top_ie6.css" type="text/css" />');
}
else
{ // other Agent ---------------------------------
	document.write('<link rel="stylesheet" href="./common/css/top_ie6.css" type="text/css" />');
}