学步园

  <DIV id="closeLayer"  onClick="closeMe()"><IMG src="jiuye/close.gif" width="15" height="13"></DIV>
  <div id ="jiuye"><img src="jiuye/jiuye1.jpg" id="jiuyeImage" onclick="javascript:location='http://www.qk12333.com'" style="cursor:hand"/></div>
  <style type="text/css">
  #jiuye{
	  position:absolute;
	  left:16px;
	  top:129px;
	  width:600px;
	  height:540px;
	  z-index:1;
	  
  }
  #closeLayer{
	  position:absolute;	
	  left:580px;	
	  top:143px;	
	  width:24px;	
	  height:19px;
	  z-index:2;
  }
  </style>
<script src="jiuye/jquery-1.8.0.js" type="text/javascript"></script>
<script type="text/javascript">
  
function closeMe(){
	document.getElementById("closeLayer").style.display="none";
	document.getElementById("jiuye").style.display="none";
	$(window).unbind();
}
  // 居中
function center() {
	var obj=$("#jiuye");
	var closeObj=$("#closeLayer");
	var screenWidth = $(window).width(), screenHeight = $(window).height(); //当前浏览器窗口的 宽高
	var scrolltop = $(document).scrollTop();//获取当前窗口距离页面顶部高度
	var objLeft = (screenWidth - obj.width())/2 ;
	var objTop = (screenHeight - obj.height())/2 + scrolltop;
	obj.css({left: objLeft + 'px', top: objTop + 'px','display': 'block'});
	
	var closeObjLeft = (screenWidth + obj.width())/2-closeObj.width()-2 ;
	var closeObjTop = (screenHeight - obj.height())/2 + scrolltop+12;
	closeObj.css({left: closeObjLeft + 'px', top: closeObjTop + 'px','display': 'block'});
	//浏览器窗口大小改变时
	$(window).resize(function() {
	screenWidth = $(window).width();
	screenHeight = $(window).height();
	scrolltop = $(document).scrollTop();
	objLeft = (screenWidth - obj.width())/2 ;
	objTop = (screenHeight - obj.height())/2 + scrolltop;
	obj.css({left: objLeft + 'px', top: objTop + 'px','display': 'block'});
	var closeObjLeft = (screenWidth + obj.width())/2-closeObj.width()-2 ;
	var closeObjTop = (screenHeight - obj.height())/2 + scrolltop+12;
	closeObj.css({left: closeObjLeft + 'px', top: closeObjTop + 'px','display': 'block'});
	});
	//浏览器有滚动条时的操作、
	$(window).scroll(function() {
	screenWidth = $(window).width();
	screenHeight = $(window).height();
	scrolltop = $(document).scrollTop();
	objLeft = (screenWidth - obj.width())/2 ;
	objTop = (screenHeight - obj.height())/2 + scrolltop;
	obj.css({left: objLeft + 'px', top: objTop + 'px','display': 'block'});
	var closeObjLeft = (screenWidth + obj.width())/2-closeObj.width()-2 ;
	var closeObjTop = (screenHeight - obj.height())/2 + scrolltop+12;
	closeObj.css({left: closeObjLeft + 'px', top: closeObjTop + 'px','display': 'block'});
	});
} 
center();
$('#closeLayer').show(300).delay(3000).fadeOut("slow");
$('#jiuye').show(300).delay(3000).fadeOut("slow",function(){   
   //隐藏时把元素删除   
  $(window).unbind();
});   
</script>