////////////////////////////////////show-hide/////////////////////////////////////
//shows/hides an id
function showhide(myId) {
	if (document.getElementById) {
		state = document.getElementById(myId).style.display
		if (state == 'block') {
			hideId(myId)
			return false
		}
		else {
			showId(myId)
			return false
		}
	}
}

//hides an id
function hideId(myId) {
	if (document.getElementById) {
		document.getElementById(myId).style.display = 'none'
	}
}

//shows an id
function showId(myId) {
	if (document.getElementById) {
		document.getElementById(myId).style.display = 'block'
	}
}