function SetStyleSheet() {

var agt = navigator.userAgent.toLowerCase();  //Converts to lower case for standardization
var is_major = parseInt (navigator.appVersion);  //Pulls out the major section of the version number 
var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('hotjava')==-1));
var is_mac    = (agt.indexOf("mac")!=-1);
var is_nav4 = (is_nav && (is_major == 4)); 

if (is_nav4){ 
	if (is_mac){ document.write("<link rel='stylesheet' href='../AttachmentsByTitle/WestpacStyleMacN4/$FILE/WestpacStyleMacN4.css' type='text/css'>");
	}
	else { document.write("<link rel='stylesheet' href='../AttachmentsByTitle/WestpacStyleN4/$FILE/WestpacStyleN4.css' type='text/css'>");
	}
}
else if (is_nav){ document.write("<link rel='stylesheet' href='../AttachmentsByTitle/WestpacStyleNsc/$FILE/WestpacStyleNsc.css' type='text/css'>");
}
else { document.write("<link rel='stylesheet' href='../AttachmentsByTitle/WestpacStyleIE/$FILE/WestpacStyleIE.css' type='text/css'>");
}
}