var div = document.getElementsByTagName("div");
var input = document.getElementsByTagName("input");
var textarea = document.getElementsByTagName("textarea");
function on(ID) {
	div[ID].style.display = "block";
}
function off(ID , tag , target) {
	var tags = document.getElementsByTagName(tag);
	div[ID].style.display = "none";
	tags[target].value = "";
}