$(document).ready( function() {
    setInterval( "slideSwitch()", 4000 );
    //valida formulario da pagina de contatos
    $("#contato").validate({
        rules:{
            nome:{
                required: true
            },
            email:{
                required: true,
                email:true
            },
            assunto:{
                required: true
            },
            msg:{
                required: true 
            }
        },
        messages:{
            nome:{
                required: "*Obrigatório"
            },
            assunto:{
                required: "*Obrigatório"
            },
            msg:{
                required: "*Obrigatório"
            },
            email:"*Obrigatório"
        }
    });
    $("#cadastro").validate({
        rules:{
            nome:{
                required: true
            },
            email:{
                required: true,
                email:true
            }
        },
        messages:{
            nome:{
                required: "*Obrigatório"
            },
            email:"*Obrigatório"
        }
    });
});

function slideSwitch() {
    var $active = $('#cabecalho IMG.active');
    if ( $active.length == 0 )
        $active = $('#cabecalho IMG:last');
    var $next =  $active.next().length ?$active.next():$('#cabecalho IMG:first');
    $active.addClass('last-active');
    $next.css({opacity: 0.0})
         .addClass('active')
         .animate({opacity: 1.0}, 1000, function() {
          $active.removeClass('active last-active');
        });
}    
function popup(url) {
	var largura = 350;
	var altura = 400;
	var topo = (screen.height/2)-200;
	var left = (screen.width/2)-175;
	var params = 'width='+largura;
	params += ', height='+altura;
	params += ', top='+topo+', left='+left;
	params += ', scrollbars=0, statusbar=no';
	
	window.open(url, 'conversa', params);
	return false;
}