function get_version() {

    bName = navigator.appName;
    bVer = parseInt(navigator.appVersion); 

    // if IE version 4 or greater, use 'fancy' stylesheet;
    // if Netscape or other browser use standard stylesheet.
    if (bName == "Microsoft Internet Explorer" && bVer >= 4) ver = "e4";
    else ver = "n4";

}

function attach_styles() {
	if (ver == "e4") document.write('<LINK rel="stylesheet" href="gis.css">');
	else if (ver == "n4") document.write('<LINK rel="stylesheet" href="gis_ns4.css">');
}