var isNS6 = (navigator.userAgent.indexOf("Gecko") > 0) ? 1 : 0; // detect Netscape 6
var isNS4 = (document.layers); // detect Netscape 4+
var isIE4 = (document.all); // detect Internet Explorer 4+
var isNS = isNS4 || isNS6 ;
function style(){
document.write('')
}
function table_background(){
if (isNS)
document.write('')
else if (isIE4)
document.write('