var agt=navigator.userAgent.toLowerCase();

// *** BROWSER VERSION ***
// Note: On IE5, these return 4, so use is_ie5up to detect IE5.
var is_major = parseInt(navigator.appVersion);
var is_minor = parseFloat(navigator.appVersion);

// *** BROWSER TYPE ***
var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
						&& (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
						&& (agt.indexOf('webtv')==-1));
var is_nav4 = (is_nav && (is_major == 4));
if ( is_nav4 ) {
	document.write("<link rel=\"stylesheet\" type=\"text/css\" href=\"http://devresource.hp.com/country/us/eng/styles/drc_styles_ns4.css\">");	
}