// Browser Detection for CSS styles
    var browser = "unknown"
    var version = 0
    var detected = false
    var ua = window.navigator.userAgent
	var agt = navigator.userAgent.toLowerCase()
    var mac = (agt.indexOf("mac")!=-1)

    // Get Browser
    if(ua.indexOf("MSIE") > 0)
   	    browser = "Internet Explorer"
    else
        browser = "Netscape"

    // Get version
    if (ua.indexOf("5.") > 0)
         version = 5
    else if(ua.indexOf("4.5") > 0)
	     version = 4.5
    else if(ua.indexOf("4.") > 0)
         version = 4

    if (mac  && (browser == "Internet Explorer" && version == 4.5))
        document.write("<LINK REL='STYLESHEET' HREF='css/ie45_mac.css'>") // IE4.5 on a MACintosh
    else if (mac  && (browser == "Internet Explorer" && version >= 5))
        document.write("<LINK REL='STYLESHEET' HREF='css/ie_mac.css'>") // IE5 on a MACintosh
    else if (mac && (browser == "Netscape" && version == 4))
        document.write("<LINK REL='STYLESHEET' HREF='css/nav_mac.css'>") // NN4 on a MACintosh
    else if (mac && (browser == "Netscape" && version >= 5))
        document.write("<LINK REL='STYLESHEET' HREF='css/nav6_mac.css'>") // NN6 on a MACintosh
    else if (!mac && (browser == "Netscape" && version >= 4))
        document.write("<LINK REL='STYLESHEET' HREF='css/nav_pc.css'>") // NN on a PC
    else
        document.write("<LINK REL='STYLESHEET' HREF='css/ie_pc.css'>") // IE on a PC