function SmileAdver_Class(){
var showad = true;					 //判断广告显示与否
var leftImageArray = new Array();   //保存左边的广告图片数组 
var rightImageArray = new Array();  //保存右边的广告图片数组 
var leftPos,rightPos;               //leftPos = 左边广告的距左边栏位置(px)    rightPos = 右边广告的距右边栏位置(px) 
var leftTop,rightTop;               //leftTop = 左边广告的距顶边栏位置(px)    rightTop = 右边广告的距顶边栏位置(px) 
var lastScrollY=0;  
  
leftPos = rightPos = 1;            //默认为10 
leftTop = rightTop = 1;           //默认为150 
this.setLeftPos = function(value){ 
  if(isNaN(value)){value = 10;}   //非数字则默认为10 
  leftPos = value; 
} 
this.setRightPos = function(value){ 
  if(isNaN(value)){value = 10;}   //非数字则默认为10 
  rightPos = value; 
} 
this.setLeftTop = function(value){ 
  if(isNaN(value)){value = 1}   //非数字则默认为150 
  leftTop = value; 
} 
this.setRightTop = function(value){ 
  if(isNaN(value)){value = 1;}   //非数字则默认为150 
  rightTop = value; 
} 
//添加左边的图片广告 addLeftImage(链接,图片地址,链接目标,图片提示) 
this.addLeftImage = function(href,image,target,title){ 
  var imageArray = getImageArray(href,image,target,title); 
  if(imageArray != null){ 
     leftImageArray[leftImageArray.length] = imageArray; 
  } 
} 
//添加右边的图片广告 addRightImage(链接,图片地址,链接目标,图片提示) 
this.addRightImage = function(href,image,target,title){ 
  var imageArray = getImageArray(href,image,target,title); 
  if(imageArray != null){ 
     rightImageArray[rightImageArray.length] = imageArray; 
  } 
} 
//内部添加广告图片使用,如果没有图片地址,则返回一个null值,否则返回一个数组 
function getImageArray(href,image,target,title){ 
  if(image == undefined){return null;}                 //没有图片地址,不添加 
  if(target == undefined || target == ""){target = "_blank"};     //默认为_blank打开方式 
  target = " target=\"" + target + "\""; 
  if(title == undefined){                         //广告图片title提示 
   title = "" ; 
  }else{ 
   title = " title=\"" + title + "\""; 
  } 
  //链接以www.开头则自动加上http://  (否则链接时会链接错误) 
  if(href.toLowerCase().substring(0,4) == "www."){ 
    href = "http://" + href; 
  } 
  if(image.toLowerCase().substring(0,4) == "www."){ 
    image = "http://" + image; 
  } 
  return new Array(href,image,target,title); 
} 
//内部显示图片横幅所用 showImageDiv(div的名称,div的摆放方向(left,right),div的摆放位置,div层距顶部的位置,显示的图片数组变量) 
function showImageDiv(div,pos,posPX,topPx,imageArray){ 
  var i; 
  document.write("<div id=\"" + div + "\" style=\"" + pos + ":" + posPX + "px;POSITION:absolute;TOP:" + topPx + "px;\"><div style=\"position: absolute;top:0px;right:0px;margin:2px;padding:2px;\"><a href=\"javascript:SmileAdver.hidead();\" style=\"color:red;text-decoration:none;font-size:12px;\">关闭</a></div>"); 
  for(i=0; i< imageArray.length; i++){ 
     document.write("<a href=\"" + imageArray[i][0] + "\" "+ imageArray[i][2]+ imageArray[i][3] + "><img src=\""+ imageArray[i][1] + "\" border=\"0\" "+ imageArray[i][3] + "></a>"); 
     if(i != imageArray.length-1){document.write("<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\"><tr><td height=10></td></tr></table>");} 
  } 
  document.write("</div>");  
} 
//滚动广告对联图片 
this.scroll = function(){  
  //showImageDiv("smilediv1","left",leftPos,leftTop,leftImageArray); 
  showImageDiv("smilediv2","right",rightPos,rightTop,rightImageArray); 
   window.setInterval(scrollImage,1); 
} 
this.scrollImg= function(){ 
scrollImage(); 
}

//正确获取滚动轴滚过的高
function getScrollY(){
	return document.body.scrollTop ? document.body.scrollTop : document.documentElement.scrollTop;
}

//内部使用用来滚动广告图片 
function scrollImage(){ 
  if(!showad){return;}
  var diffY,percent; 
  diffY=getScrollY();	//正确获取滚动轴滚过的高document.documentElement.scrollTop;		//diffY=document.body.scrollTop; 
  percent=.1*(diffY-lastScrollY);  
  if(percent>0)percent=Math.ceil(percent);  
  else percent=Math.floor(percent);  
  //document.all.smilediv1.style.pixelTop+=percent;  
  document.all.smilediv2.style.pixelTop+=percent;
  lastScrollY=lastScrollY+percent;
} 
//关闭广告
this.hidead = function()
{
 showad = false;
 //document.getElementById("smilediv1").style.display="none";
 document.getElementById("smilediv2").style.display="none";
}
} 
///////////////////////////////////////////类结束////////////////////////////////////////////////////////////////


/////////类的使用示例代码//////////////////////////////////////////////// 
var SmileAdver = new SmileAdver_Class(); 
SmileAdver.setLeftPos(5); 
SmileAdver.setRightPos(5); 
SmileAdver.setLeftTop(100); 
SmileAdver.setRightTop(253);
SmileAdver.showad = true;
SmileAdver.addRightImage("105_job/01_p001.asp", "06_images/Zhaopin.jpg", "_parent", "招聘信息");  
SmileAdver.scroll();