/* browser detection */ 
var isNS6 = isnetscape6();
var isIe5 = isMozilla_1_1();

function getGeckoVersion() { 
var isGecko = navigator.product == 'Gecko'; 
return isGecko? parseInt(navigator.productSub) : 0; 
} 

function isnetscape6() { 
var gv = getGeckoVersion(); 
return gv? gv <= 20020508 : false; 
} 

function isMozilla_1_1() { 
var gv = getGeckoVersion(); 
return gv? gv >= 20020826 : false; 
}