function show(obj1, obj2, obj3){
	document.getElementById(obj1).style.display="block"
	document.getElementById(obj2).style.display="none"
	document.getElementById(obj3).style.display="none"
}

function hide(obj1, obj2){
	document.getElementById(obj1).style.display="block"
	document.getElementById(obj2).style.display="none"
}