// JavaScript Document
var rnd = Math.floor(Math.random()*20);

(function($) {
  var cache = [];
  // Arguments are image paths relative to the current page.
  $.preLoadImages = function() {
    var args_len = arguments.length;
    for (var i = args_len; i--;) {
      var cacheImage = document.createElement('img');
      cacheImage.src = arguments[i];
      cache.push(cacheImage);
    }
  }
})(jQuery)

for (i=1; i<=19; i++) {
	jQuery.preLoadImages("images_bg/img_"+i+".jpg");
}


function animBg() {
	$('#geral_transicao').fadeOut(1000,function() {
		
		rnd == 0 ? rnd = 1 : rnd = rnd;
		
		$('#geral_transicao').css("background-image", "url(images_bg/img_"+rnd+".jpg)");
		$('#geral_transicao').fadeIn(1000);
		rnd = Math.floor(Math.random()*20)
	});
}

function cadEmail() {
	var email = $('#email');
	if (!email.attr('value')) {
		alert('Forneça um e-mail válido');
		email.focus();
	} else {
		$.ajax({
			type: "POST",
			cache: false,
			url: "cad_email.php",
			data: "email="+email.attr('value')+"",
			success: function(dados){
				if (dados == '1') {
					alert('Seu e-mail já se encontra cadastrado em nossa base de dados!');
				} else
					window.location = "confirma_cadastro.php";
			}
		});	
	}
}