function writeCSS() {
	/* TO DO: safe, Mac != MSIE 4.5, Lynx, WebTV, Gecko/Netscape 6 */
	var b = "";
	if (B.IE4 || B.IE5) { b = "ie" }
	else if (B.NN)      { b = "nn" }
	else                { b = "ie" } /* "safe" */
	document.write ('<LINK REL="stylesheet" TYPE="text/css" HREF="/_css_/' + b + '.css" TITLE="accumulative" />');
}