if ((window.navigator.appName.indexOf("Microsoft")==0) & (window.navigator.appVersion.indexOf("4.0 (compatible; MSIE 6")==0) || (window.navigator.appVersion.indexOf("4.0 (compatible; MSIE 5")==0) || (window.navigator.appVersion.indexOf("4.0 (compatible; MSIE 4")==0) || (window.navigator.appVersion.indexOf("4.0 (compatible; MSIE 3")==0)) cond=1;
   else cond=0;