var id = 10000000000;
var timer;

function backgroundPreloaded() {
	var image = document.getElementById("background-preload");
	document.body.style.backgroundImage = "url('" + image.src + "')";
}

function changeBackground() {
	$.ajax({
			url: "page/res/common/img/random/id.php?ex=" + id,
			success: function(data) {
				var tab = data.split(';');
				id = tab[0];
				var image = document.getElementById("background-preload");
				image.src = tab[1];
			}
	});
	timer = setTimeout("changeBackground()", 10000);
}