//Browser
var OPER=navigator.userAgent.indexOf("Opera");
if (document.layers){ //Netscape 4.x
document.write("");
}
else if (document.all){ // Explorer
document.write("");
}
else if (document.getElementById){ //Netscape 6.x
document.write("");
}
else if((OPER>-1)) { // Opera 6.x
document.write("");
}