//OSC.js  pag 452, O'reilly,  Dec 15, 2016
function O(obj)
{	if (typeof obj == 'object') return obj
	else return document.getElementById(obj)
}

function S(obj)
{
	return O(obj).style
}

function C(name)
{
	var elements = document.getElementsByTagName('*')
	var objects = []
	
	for (var i = 0 ; i < elements.length ; ++ i)
		if (elements[i].className == name)
			objects.push(elements[i])
			
	return objects
}