function getFilterElements(filterName) {
	var elemArray = document.getElementsByName(filterName);
	return elemArray;
}

//used to switch off all other filters than 'Any'
function switchOffAllFiltersButAny(filterName)
{
	var elemArray = getFilterElements(filterName);
	for (var y = 0; y < elemArray.length; y++)
	{
		if (elemArray[y].value != '')
		{
			elemArray[y].checked = false;
		}
	}
}

//used to switch off the 'Any' filter
function switchOffAnyFilter(filterName)
{
	var elemArray = getFilterElements(filterName);
	for (var y = 0; y < elemArray.length; y++)
	{
		if (elemArray[y].value == '')
		{
			elemArray[y].checked = false;
		}
	}
}


// used to switch off all filters, except the chosen one
function switchOffOtherFilter(filterName, chosen)
{
	var elemArray = getFilterElements(filterName);
	for (var y = 0; y < elemArray.length; y++)
	{
		if (elemArray[y].value != chosen)
		{
			elemArray[y].checked = false;
		}
	}
}