function showPart(name)
{
	if (document.getElementsByName(name)[0])
		document.getElementsByName(name)[0].style.visibility = "visible";
}

function hidePart(name)
{
	if (document.getElementsByName(name)[0])
		document.getElementsByName(name)[0].style.visibility = "collapse";
}

function enableField(name)
{
	if (document.getElementsByName(name)[0])
		document.getElementsByName(name)[0].disabled = false;
}

function disableField(name)
{
	if (document.getElementsByName(name)[0])
		document.getElementsByName(name)[0].disabled = true;
}

function enableFieldInGroup(name, index, count)
{
	for (i = 0; i < count; i++) {
	
		disableField(name+"_"+i);
		if (i != index)
			if (document.getElementsByName(name+"_"+i)[0])
				document.getElementsByName(name+"_"+i)[0].value = "";
	
	}
	enableField(name+"_"+index);
	if (document.getElementsByName(name+"_"+index)[0])
		document.getElementsByName(name+"_"+index)[0].focus();
}