//首页大图展示效果
var showDelay=1000;
$(function(){	
	$("#divImgPanel").slideDown(showDelay);	
	window.setTimeout(autoClose,15000);
	
	$("#divImgPanelClose").click(changeVisble);
});

function autoClose()
{
	$("#divImgPanel").slideUp(showDelay);
	
	$("#divImgPanelClose").css({
		"background-position":"0 0"
	});
}

function changeVisble()
{
	$("#divImgPanel").slideToggle(showDelay,function(){
		var position="0 0";
		if($(this).is(":visible"))
		{
			position="-19px 0px";
		}
		$("#divImgPanelClose").css({
			"background-position":position
		});
	});
}