var NE=false
var IE=false
var NE6=false
var O=false

//alert("this is " + navigator.appName + " version: " + navigator.appVersion)
if(navigator.appName=="Netscape" || navigator.appName=="Opera"){
 if(parseInt(navigator.appVersion)==4){
  NE=true
 }else if(parseInt(navigator.appVersion)>=5){
  NE6=true
 }
}else if(navigator.appName=="Microsoft Internet Explorer"){
 IE=true
}