var bgImageAr=['wide_fort', 'wide_lighthouse', 'wide_bg', 'wide_palm'];
var bg_key=0;
function new_bg(){
	image=bgImageAr[bg_key];
	url="images/bg/"+image+".jpg";
	$("body").css("background-image", "url("+url+")");
	var tim=setTimeout('bg_step(url)', 12000);
}
function bg_step(url){
	$("#imagine").fadeOut(8000, function(){
		$("#fader").attr("src",url);
		$("#imagine").show();
		bg_key=bg_key+1;
		if (bg_key==4){
			bg_key=0;
		}
		new_bg();
	});
}