var ua = new Array();
/* Detect browsers by object support: */
ua["dom"] = document.getElementById;
ua["ns4"] = document.layers;
ua["ie"] = document.all;
ua["iemac"] = ua["ie"] && !self.screenTop;
ua["iewin"] = ua["ie"] && !ua["iemac"];
ua["safari"] = ua["dom"] && !document.all;
ua["moz"] = ua["dom"] && !ua["ie"] && !self.screenTop;
ua["opera"] = ua["ie"] && !ua["iemac"] && self.screen.pixelDepth;
ua["ie"] = ua["opera"] ? false : ua["ie"];
ua["iewin"] = ua["opera"] ? false : ua["iemac"] ? false : ua["iewin"];
ua["safari"] = ua["moz"] ? false : ua["safari"];

/* Last resort: detect browser versions by user agent string: */
ua["ns7"] = ua["moz"] && navigator.userAgent.indexOf("Netscape/7")!=-1;
ua["ns8"] = ua["moz"] && navigator.userAgent.indexOf("Netscape/8")!=-1;
ua["ff"] = ua["moz"] && navigator.userAgent.indexOf("Firefox")!=-1;
ua["ie5"] = ua["iewin"] && navigator.appVersion.indexOf("MSIE 5.0")!=-1;
ua["ie55"] = ua["iewin"] && navigator.appVersion.indexOf("MSIE 5.5")!=-1;
ua["ie6"] = ua["iewin"] && navigator.appVersion.indexOf("MSIE 6")!=-1;
ua["iemac52"] = ua["iemac"] && navigator.userAgent.indexOf("MSIE 5.2")!=-1;
ua["iemac5"] = ua["iemac"] && !ua["iemac52"];