if ((navigator.appVersion.indexOf("Mac")!=-1) &&(navigator.appVersion.indexOf("MSIE 4.")!=-1) ){
	document.write('<LINK REL=\"stylesheet\" type=text/css href=\"css/style1_MAC_IE.css\">');}
else if ((navigator.appVersion.indexOf("Mac")!=-1) && (navigator.appVersion.indexOf("MSIE")==-1)){
	document.write('<LINK REL=\"stylesheet\" type=text/css href=\"css/style1_MAC_NS.css\">');}
else if ((navigator.appVersion.indexOf("MSIE")==-1)){
	document.write('<LINK REL=\"stylesheet\" type=text/css href=\"css/style1_PC_NS.css\">');}
else {
	document.write('<LINK REL=\"stylesheet\" type=text/css href=\"css/style1_PC_IE.css\">');}