function showDiv(divname) {
    if (document.getElementById && document.getElementById(divname) != null)
		document.getElementById(divname).style.display='inline';     
}
function hideDiv(divname) {
    if (document.getElementById && document.getElementById(divname) != null)
		document.getElementById(divname).style.display='none';     
}
function hoverOn(thisDiv, divname) {
	thisDiv.style.backgroundColor=menuhovercolor;
	if (divname)
		showDiv(divname);
}

function hoverOff(thisDiv, divname) {
	thisDiv.style.backgroundColor=menubgcolor;
	if (divname)
		hideDiv(divname);
}
function validRadio(formField,fieldLabel) {
	var result = true;
	
	for (i=0; i<formField.length; i++) {
    	if (formField[i].checked) {
    	  return true;
    	}
  	}
 	alert('Please choose a ' + fieldLabel + '.');
	return false;
}