if(navigator.userAgent.indexOf("Firefox")!=-1){
document.write ("");
//detect Netscape 4.7+
} else if (navigator.appName=="Netscape"&&parseFloat(navigator.appVersion)>=4.7){
document.write ("");
}
//Detect IE5.5+
version=0
if (navigator.appVersion.indexOf("MSIE")!=-1){
temp=navigator.appVersion.split("MSIE")
version=parseFloat(temp[1])
}
if (version>=5.5){ //NON IE browser will return 0
document.write ("");
}
// Opera
if(navigator.userAgent.indexOf("Opera")!=-1){
var versionindex=navigator.userAgent.indexOf("Opera")+6
if (parseInt(navigator.userAgent.charAt(versionindex))>=8){
document.write ("");
}
}