var brAgent = navigator.userAgent;
var OPR = (brAgent.indexOf('Opera')!=-1);
var IE5 = (brAgent.indexOf('MSIE')!=-1);
var NS6 = (brAgent.indexOf('Gecko')!=-1);
var SFR = (brAgent.indexOf('Safari')!=-1);

	if(OPR){
		document.write ('<link rel="stylesheet" href="css_2006/opera.css" type="text/css">');
		} else if(IE5){
		document.write ('<link rel="stylesheet" href="css_2006/ie.css" type="text/css">');
		} else if(SFR){
		document.write ('<link rel="stylesheet" href="css_2006/safari.css" type="text/css">');
		} else if(NS6){
		document.write ('<link rel="stylesheet" href="css_2006/nn.css" type="text/css">');
		}