function changeto(highlightcolor){
	source=event.srcElement
	if (source.tagName=="TR"||source.tagName=="TABLE")
	return
	while(source.tagName!="TR")
	source=source.parentElement
	if (source.style.backgroundColor!=highlightcolor)
	source.style.backgroundColor=highlightcolor }

function changeback(originalcolor){
	if (event.fromElement.contains(event.toElement)||source.contains(event.toElement))
	return
	if (event.toElement!=source)
	source.style.backgroundColor=originalcolor }