function admin(caminho){
	if(screen.width == '800')
    {
	window.open(caminho,'ADMINISTRACAO','width=789,height=549,top=0,left=0,status=1,scrollbars=1');
	window.close();
	}
	else
    {
		Wwidth  = 789;
		Wheight = 549;

		tamW = screen.width;
		tamH = screen.height;

		posW = (tamW/2) - (Wwidth/2);
		posH = (tamH/2) - (Wheight/2);	

		params = ",left="+posW+",top="+posH+",width="+Wwidth+",height="+Wheight+",status=0,scrollbars=1";
	
		window.open(caminho,'ADMINISTRACAO',params);
		
		window.close();
	}
}