var speed = 5000;
var fade_image_list = [];
var fade_image_index = 0;

function fade_image()
{
	if (++fade_image_index>=fade_image_list.length)
		fade_image_index = 0;
	$(fade_image_list[fade_image_index]).fadeOut(speed);
	$(fade_image_list[fade_image_index + 1>=fade_image_list.length ? 0 : fade_image_index + 1]).fadeIn(speed, fade_image);
}

$(document).ready(function()
{
	if (/\/[0-9]+-[0-9]+\/preview.html/.test(window.location.href))
	{
		$("#contentMain_header img.ImageElement").show();
		$("#contentMain_header .contentMain_header_element").css("position", "relative");
	}
	else
	{
		$("#contentMain_header .contentMain_header_element").css("position", "absolute");
		var temp = [];
		$("#contentMain_header img.ImageElement").each(function(i, elem)
		{
			temp.push(elem);
		});
		fade_image_list = [];
		while(temp.length>0)
		{
			var r = Math.floor(Math.random() * (temp.length - 1));
			fade_image_list.push(temp[r]);
			temp.splice(r, 1);
		}
		fade_image_index = 0;
		$(fade_image_list[0]).show().fadeOut(speed);
		$(fade_image_list[1]).fadeIn(speed, fade_image);
	}
});