if (navigator.userAgent.indexOf("MSIE 5") > -1 && navigator.userAgent.indexOf("Mac") > -1) {
	document.all.mainContentWrapper.style.width = "513px";
	document.all.subNav.style.height = "36px";
} 
else if (navigator.userAgent.indexOf("MSIE 6") > -1 && navigator.userAgent.indexOf("Win") > -1) {
	document.getElementById("mainContentWrapper").style.width = "515px";
}