function showDropDown(id) {
	document.getElementById(id).style.display = 'block';
}

function hideDropDown(id) {
	document.getElementById(id).style.display = 'none';
}

function positionDropDown(id) {
	var wrapper = document.getElementById("navigation");
	
	var wrapperleft = wrappertop = 0;
	if(wrapper.offsetParent) {
		do {
			wrapperleft += wrapper.offsetLeft;
			wrappertop += wrapper.offsetTop;
		} while (wrapper = wrapper.offsetParent);
	}
	
	var anchorObjectName = id + "_trigger";
	var obj = document.getElementById(anchorObjectName);
	
	var curleft = curtop = 0;
	if(obj.offsetParent) {
		do {
			curleft += obj.offsetLeft;
			curtop += obj.offsetTop;
		} while (obj = obj.offsetParent);
	}
	
	var leftCoor = curleft - wrapperleft + 10;
	var topCoor = curtop - wrappertop + 26;	
	
	var leftCoor = leftCoor + "px";
	var topCoor = topCoor + "px";
	
	document.getElementById(id).style.left = leftCoor;
	document.getElementById(id).style.top = topCoor;
}