var agt=navigator.userAgent.toLowerCase(); 

    var is_major = parseInt(navigator.appVersion); 
    var is_minor = parseFloat(navigator.appVersion); 

    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_nav2 = (is_nav && (is_major == 2)); 
    var is_nav3 = (is_nav && (is_major == 3)); 
    var is_nav4 = (is_nav && (is_major == 4)); 
    var is_nav4up = (is_nav && (is_major >= 4)); 
    var is_navonly      = (is_nav && ((agt.indexOf(";nav") != -1) || 
                          (agt.indexOf("; nav") != -1)) ); 
    var is_nav5 = (is_nav && (is_major == 5)); 
    var is_nav5up = (is_nav && (is_major >= 5)); 

    var is_ie   = (agt.indexOf("msie") != -1); 
    var is_ie3  = (is_ie && (is_major < 4)); 
    var is_ie4  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")==-1) ); 
    var is_ie4up  = (is_ie  && (is_major >= 4)); 
    var is_ie5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) ); 
    var is_ie5up  = (is_ie  && !is_ie3 && !is_ie4); 

    var is_aol   = (agt.indexOf("aol") != -1); 
    var is_aol3  = (is_aol && is_ie3); 
    var is_aol4  = (is_aol && is_ie4); 

	var is_opera = (agt.indexOf("opera") != -1);
	
css_NN6 = "nn6style.css";
css_NN = "nnstyle.css";
css_IE = "iestyle.css";

if (is_nav5up)
{
document.write("<link rel='stylesheet' href='../css/" + css_NN6 + "' type='text/css'>");
}
else if (is_nav4up)
{
document.write("<link rel='stylesheet' href='../css/" + css_NN + "' type='text/css'>");
}
else if (is_ie4up || is_opera)
{
document.write("<link rel='stylesheet' href='../css/" + css_IE + "' type='text/css'>");
document.write("<link rel='stylesheet' href='../css/print.css' type='text/css'  media='print'>");
}
else 
{
document.write("<link rel='stylesheet' href='../css/" + css_IE + "' type='text/css'>");
document.write("<link rel='stylesheet' href='../css/print.css' type='text/css'  media='print'>");
}