//
// getHeight()
// determines the required height for the dropdown menu
function getHeight(id) {
	id = id+"Content";
	h = Number.NaN;
	if (document.getElementById) {
		var ele = document.getElementById(id);
		if (ele && typeof ele.offsetHeight != 'undefined') {
			h = ele.offsetHeight;
		}
	}
	h += 15;
	return h;
}

//
// toggleSelect()
// toggles select boxes visibility
function toggleSelect(visibility) {
	var navcol = getElementsByClassName(document,"*","nav-col");
	navcol = navcol[0];
	var selects = navcol.getElementsByTagName("select");
	for(i=0;i<selects.length;i++) {
		if(visibility == "show") selects[i].style.visibility = "visible";
		if(visibility == "hide") selects[i].style.visibility = "hidden";
	}
}