var intervalId = 0;

function rotator() {
	
	clearInterval(intervalId);
	do {
		var image = "resources/left_" + Math.floor(((Math.random() * 9) + 1)) + ".jpg";
	} while (image == $("div#left_col img").attr("src")); 
  
  $("div#left_col img").fadeOut("slow", function () {
  	$("div#left_col img").attr("src", image);
  	$("div#left_col img").fadeIn("slow");
  });
	
	intervalId = window.setInterval("rotator()", 15000); 
};

$(document).ready(function() {

	var image = "resources/left_" + Math.floor(((Math.random() * 9) + 1)) + ".jpg"; 
	$("div#left_col img").attr("src", image);
	
});

$(window).ready(function() {
	intervalId = window.setInterval("rotator()", 15000); 
});