var brw_p = navigator.platform.charAt(0);
var brw_v = navigator.appVersion.charAt(0);
if( brw_p == "M" && navigator.appVersion.charAt(22) == "5") brw_v = 5;
var brw_n = navigator.appName.charAt(0);


var iIE4 = false;       //Internet Explorer 4.x
var iNN4 = false;       //Netscape 4.x
var iIE5 = false;       //Internet Explorer 5.x
var iNN6 = false;       //Netscape 6.x

if(document.getElementById){
        if(brw_n == "M" || brw_n == "O"){       iIE5=true;
        } else {                iNN6=true;}
} else {
        if((brw_v >= 4)&&(brw_n == "M")){       iIE4 = true;
        } else {                                if((brw_v >= 4)&&(brw_n == "N")){iNN4 = true;}}
}