var emptyDatesShown = true;

function getElementsByAttribute(val)
{
	var all = document.all||document.getElementsByTagName('*')
	var arr = []
	for(var k=0;k<all.length;k++)
	{
		if(all[k].className == val)
		{
			arr[arr.length] = all[k];
		}
	}
	return arr
} 

function toggleEmptyDateVisibility()
{
	var elements = getElementsByAttribute('empty');
	//Loop elements and hide
	for(var i=0; i<elements.length; i++)
	{
		elements[i].parentNode.parentNode.parentNode.className = (emptyDatesShown) ? "listrowHidden" : "listrowA";
	}
	emptyDatesShown = (emptyDatesShown) ? false : true;
}