function abre_janela(pagina,largura,altura,scrolls)
{
	if(!scrolls)
		scrolls = 'no';
	window.open(pagina,'','toolbar=no,location=no,top=200,left=200,directories=no,status=no,menubar=no,scrollbars='+scrolls+',Resizable=no,copyhistory=no,width=' + largura + ',height=' + altura)
}
function swap(imgx,srcx){
	try{
		document.getElementsByName(imgx)[0].src = srcx;
	}catch(e){}
}