/*
* Check platform/browser version.  A complete reference is available at
* http://www.mozilla.org/docs/web-developer/sniffer/browser_type.html
* if this needs to be extended.
*/
var agt = navigator.userAgent.toLowerCase();
var is_mac    = (agt.indexOf("mac")!=-1);
var is_major = parseInt(navigator.appVersion);
var is_minor = parseFloat(navigator.appVersion);
var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
var is_ie3    = (is_ie && (is_major < 4));
var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 4")!=-1) );
var is_ie4up  = (is_ie && (is_major >= 4));
var is_ie5    = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );
var is_ie5_5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.5") !=-1));
var is_ie5up  = (is_ie && !is_ie3 && !is_ie4);
var is_ie5_5up =(is_ie && !is_ie3 && !is_ie4 && !is_ie5);
var is_ie6    = (is_ie && (is_major == 4) && (agt.indexOf("msie 6.")!=-1) );
var is_ie6up  = (is_ie && !is_ie3 && !is_ie4 && !is_ie5 && !is_ie5_5);
var is_ie7    = (is_ie && (is_major == 4) && (agt.indexOf("msie 7.")!=-1) );
var is_ie7up  = (is_ie && !is_ie3 && !is_ie4 && !is_ie5 && !is_ie5_5 && !is_ie6);
var is_saf = (agt.indexOf("safari")!=-1);