// setDisplay & toggleDisplay

function setDisplay(objectId,state) {
		 var object = document.getElementById(objectId);
		 object.style.display = state;
}
function toggleDisplay(objectId) {
		 var object = documentElementById(objectId);
		 state = object.style.display;
		 if (state == 'none')
		 	object.style.display = 'block';
		 else if (state != 'none')
		 	object.style.display = 'none';
}