function ShowHideElement(elementID) {
	var prop
	if (document.getElementById) 
		prop = document.getElementById(elementID).style
	else if (document.all)
		prop = document.all[elementID].style
	else if (document.layers)
		prop = document.layers[elementID]
	
	if (prop.display=='none')
		prop.display = ''
	else
		prop.display = 'none'
}