// JavaScript Document
 function change(esc)
 {
 	atual = document.getElementById('valor').value;
	if (atual == 1)
	{	
		chooseStyle(esc, 60);
		document.getElementById('valor').value = esc;
		if (esc == 2)
		{
			document.getElementById('A').src = "img/a-.jpg";	
		}
	}
	else if (atual == 2)
	{
		if (esc == 3) 
		{
			chooseStyle("4", 60);
			document.getElementById('valor').value = 4;
		}
		else
		{
			chooseStyle("1", 60);
			document.getElementById('valor').value = 1;
			document.getElementById('A').src = "img/a+.jpg";
		}
	}
	else if (atual == 3)
	{
		if (esc == 2)
		{
			chooseStyle("4", 60);
			document.getElementById('valor').value = 4;
			document.getElementById('A').src = "img/a-.jpg";
		}
		else
		{
			chooseStyle("1", 60);
			document.getElementById('valor').value = 1;
		}
	}
	else if (atual == 4 )
	{
		if (esc == 2)
		{
			chooseStyle("3", 60);
			document.getElementById('valor').value = 3;
			document.getElementById('A').src = "img/a+.jpg";
		}
		else
		{
			chooseStyle("2", 60);
			document.getElementById('valor').value = 2;
		}
	}
 }