function ad(id,str_pic,str_title,str_url,ad_width,ad_height,speed){
	this.ad_id=id;
	this.pic_str=str_pic;	//图片文件路径和文件名
	this.pic_title=str_title;  //图片标题
	this.pic_link=str_url;  //图片链接地址
	this.pic_width=ad_width;
	this.pic_height=ad_height;
	this.ad_speed=speed;	//2000:fast, 4000:middle, 6000:slow
	this.ad_pic=new Array(); //图片数组
	this.ad_title=new Array(); //图片标题数组
	this.ad_link=new Array(); //图片链接数组
	this.ad_num=0;  //初始展示图片序号
	this.ad_pic=this.pic_str.split(",");
	this.ad_title=this.pic_title.split(",");
	this.ad_link=this.pic_link.split(",");
	this.pic_count=this.ad_pic.length-1 //图片数量
	//图片预加载
	this.currentimage=new Array();   
	for (i=0;i<=this.pic_count;i++){
	  this.currentimage[i]=new Image();
	  this.currentimage[i].src=this.ad_pic[i];
	}
	//随机生成图片滤镜效果
	this.ad_set=function(){ 
	  if (document.all){
		  document.getElementById(this.ad_id).filters.revealTrans.Transition=Math.floor(Math.random()*16);
		  document.getElementById(this.ad_id).filters.revealTrans.apply();
	  }
	}
	//图片滤镜效果播放
	this.ad_play=function(){
		if (document.all)
		document.getElementById(this.ad_id).filters.revealTrans.play()
	}
	//切换下一图片
	this.ad_nextad=function(){
		if(this.ad_num<this.ad_pic.length-1){this.ad_num++ ;}else{this.ad_num=0;}
		this.ad_set();
		document.getElementById(this.ad_id).src=this.currentimage[this.ad_num].src;
		document.getElementById(this.ad_id).alt=this.ad_title[this.ad_num];
		if (this.ad_link[this.ad_num]!=""){
		  document.getElementById("ad_url_"+this.ad_id).href=this.ad_link[this.ad_num];
		}else{
		  document.getElementById("ad_url_"+this.ad_id).href="#";
		}
		document.getElementById("ad_url_"+this.ad_id).title=this.ad_title[this.ad_num];
		this.ad_play();
		setTimeout(this.ad_id+".ad_nextad()",this.ad_speed)
	}
	
	document.write("<div id='ad_divimg_"+this.ad_id+"' style='position:relative;width:"+this.ad_width+"px;height:"+this.ad_height+"px'>");
	document.write('<a href="'+this.ad_link[0]+'" id="ad_url_'+this.ad_id+'" title="'+this.ad_title[0]+'" target="_blank"><img style="FILTER: revealTrans(duration=2,transition=23);height:'+this.pic_height+'px;width:'+this.pic_width+'px" src="'+this.ad_pic[0] +'" border=0 name='+this.ad_id+' id='+this.ad_id+' onfocus=this.blur();alt="'+this.ad_title[0]+'"></a>');
	document.write("</div>");
  }