var showad = true;
	var toppx = 60;			//上端位置
	var adDivW = 100;		//宽度
	var adDivH = 360;		//高度
	var minScreenW = 1024;	//显示广告的最小屏幕宽度象素
	var ClosebuttonHtml = '<div align="right" style="position: absolute;top:0px;right:0px;margin:2px;padding:2px;z-index:2000;"><a href="javascript:;" onclick="hidead()" style="color:red;text-decoration:none;font-size:12px;">关闭</a></div>'//关闭标签
        $(this).scroll(scall); 
		$(document).ready(scall); 
		function scall() {    // 页面发生scroll事件时触发    
			if(!showad){return;}
			if($(window).width()<minScreenW){
			showad=false;
			$("#adr").css("display","none");
			$("#adl").css("display","none");
			}
			else
			{
            var bodyTop = 0;    
            if (typeof window.pageYOffset != 'undefined') {    
                bodyTop = window.pageYOffset;    
            } 
             else if (typeof document.compatMode != 'undefined' && document.compatMode != 'BackCompat') 
             {    
                bodyTop = document.documentElement.scrollTop;    
            }    
            else if (typeof document.body != 'undefined') {    
                bodyTop = document.body.scrollTop;    
            }    
           $("#adl").css({"width":adDivW,"height":adDivH});
           $("#adl").append(ClosebuttonHtml);
           $("#adr").css({"width":adDivW,"height":adDivH});
           $("#adr").append(ClosebuttonHtml);
           $("#adl").css("top", toppx + bodyTop)   // 设置层的CSS样式中的top属性, 注意要是小写，要符合“标准”    
            
           $("#adr").css("top", toppx + bodyTop)   // 设置层的CSS样式中的top属性, 注意要是小写，要符合“标准”    
            }
        }  
		function hidead()
        {
	        showad=false;
	        $("#adl").hide();
	        $("#adr").css("display","none");
        }