var d = document;
var defaultOffset = 98;
function checkScroll() {
	if (window.pageYOffset != undefined) {
		var py = window.pageYOffset;
	} else if (document.documentElement.scrollTop != undefined) {
		var py = document.documentElement.scrollTop;
	} else if (document.body.scrollTop != undefined) {
		var py = document.body.scrollTop;
	}
	if (py != undefined && py != null) {
		var bn = d.getElementById("benefitsNav");
		bn.style.position = "relative";
		var newTop = py-defaultOffset;
		if (newTop>0) {
			bn.style.top = newTop + "px";
		} else {
			bn.style.top = 0 + "px";
		}
	}
}
window.onscroll = checkScroll;