function showTip(tipId, obj) {
		var xy = getXY(obj);
		var el = document.getElementById(tipId);
		el.style.left = String(xy[0] + obj.offsetWidth) + "px";
		el.style.top = String(xy[1] + 15) + "px";
		el.style.display = "inline";
	}
	function hideTip(tipId) {
		document.getElementById(tipId).style.display = "none";
	}
	function showTab(tabId) {
		document.getElementById('prodDesc').style.display = "none";
		document.getElementById('prodSpec').style.display = "none";
		document.getElementById('prodDescTab').className = "greyTab";
		document.getElementById('prodSpecTab').className = "greyTab";
		
		document.getElementById(tabId).style.display = "inline";
		document.getElementById(tabId + "Tab").className = "whiteTab";
	}