// change class
function changeClass(id, newClass) {
identity=document.getElementById(id);
identity.className=newClass;
}	
// show / hide
function show_hide(show,hide) {
	document.getElementById(hide).style.display='none';
	obj=document.getElementById(show)
	obj.style.display == "block" ? 
	obj.style.display = "block" : 
	obj.style.display = "block";
}