// sub menu function
function showOrHide(el)
{
	var dom = document.getElementById("open_" + el).style;
	if(dom.display != "none")
	{
		dom.display = "none";			
	}
	else
	{
		try { dom.display = 'table-row'; }
		catch (e) { dom.display = 'block'; }		
	}
}