//Para abrir popups
function wopen(url,n,w,h,x,y,s){
	if(n==null)n="";
	if(s==null)s="0";
	var p="";
	if(w!=null&&h!=null){
		x=x||(screen.width-w)/2;
		y=y||(screen.height-h)/2;
		p="toolbar=no,location=no,directories=no,status=no,resizable=no,width="+w+",height="+h+",left="+x+",top="+y+",scrollbars="+s;
	}
	return window.open(url,n,p);
}