var docEle = function() 
{
    return document.getElementById(arguments[0]) || false;
}

function openNewDiv(_id) 
{
    var m = "mask";
    //if (docEle(_id)) document.body.removeChild(docEle(_id));
    if (docEle(m)) document.body.removeChild(docEle(m));
    
    //mask遮罩层

    var newMask = document.createElement("div");
    newMask.id = m;
    newMask.style.position = "absolute";
    newMask.style.zIndex = "9999";
    _scrollWidth = Math.max(document.body.scrollWidth,document.documentElement.scrollWidth);
    _scrollHeight = Math.max(document.body.scrollHeight,document.documentElement.scrollHeight);
    newMask.style.width = _scrollWidth + "px";
    newMask.style.height = _scrollHeight + "px";
    newMask.style.top = "0px";
    newMask.style.left = "0px";
    newMask.style.background = "#33393C";
    newMask.style.filter = "alpha(opacity=40)";
    newMask.style.opacity = "0.40";
 
    document.body.appendChild(newMask);
    
    //新弹出层

   // var newDiv = document.createElement("div");
   var newDiv=document.getElementById("Product_big_img");
    newDiv.id = _id;
    newDiv.style.position = "absolute";
    newDiv.style.zIndex = "9999";
    newDivWidth = 500;
   newDivHeight =410;
  //  newDivHeight =document.getElementById("table_txt2").style.height;
    newDiv.style.width = newDivWidth + "px";
   newDiv.style.height = newDivHeight + "px";
   ///   newDiv.style.top = (document.body.scrollTop + document.body.clientHeight/2 - newDivHeight/2) + "px";
 newDiv.style.top=100+"px";
    newDiv.style.left = (document.body.scrollLeft + document.body.clientWidth/2 - newDivWidth/2) + "px";
    newDiv.style.background = "#EFEFEF";
    newDiv.style.border = "1px solid #1DB2D0";
    newDiv.style.padding = "5px";
    newDiv.style.display="block";
//    newDiv.innerHTML = "弹出层内容 "; 
   document.body.appendChild(newDiv);
    
    //弹出层滚动居中

    function newDivCenter()
    {
       // newDiv.style.top = (document.body.scrollTop + document.body.clientHeight/2 - newDivHeight/2) + "px";
        newDiv.style.top=100+"px";
        newDiv.style.left = (document.body.scrollLeft + document.body.clientWidth/2 - newDivWidth/2) + "px";
    }
    if(document.all)
    {
        window.attachEvent("onscroll",newDivCenter);
    }
    else
    {
        window.addEventListener('scroll',newDivCenter,false);
    }
    
    //关闭新图层和mask遮罩层

  //  var newA = document.createElement("a");
    var newA = document.getElementById("div_close");
    newA.href = "#";
   // newA.innerHTML = "关闭";
    newA.onclick = function() 
    {
        if(document.all)
        {
            window.detachEvent("onscroll",newDivCenter);
        }
        else
        {
            window.removeEventListener('scroll',newDivCenter,false);
        }
           newDiv.style.display="none";
//        document.body.removeChild(docEle(_id));
         document.body.removeChild(docEle(m));
        return false;
    }
    
 
     newDiv.appendChild(newA);
}

 function before(st)
  {
  	    var co=arrImg.length;
    if (st==1)
    {
         document.getElementById("imgae_big_revelation").innerHTML="<img src=\"/product/ProductImg.aspx?Url="+arrImg[0]+"\"/>";
          document.getElementById("image_big_nav").innerHTML="1/"+co+"  &nbsp;&nbsp;&nbsp;Before &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <a href='javascript:next(1)'>  Next</a>";
    }
    else
    {
          document.getElementById("imgae_big_revelation").innerHTML="<img src=\"/product/ProductImg.aspx?Url="+arrImg[st]+"\"/>";
          document.getElementById("image_big_nav").innerHTML=""+(st)+"/"+co+" &nbsp;&nbsp;&nbsp;<a href='javascript:before("+(st-1)+")'> Before</a>  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <a href='javascript:next("+st+")'> Next </a>";
    }
    
  }
  function next(st)
  {
    var co=arrImg.length;
    if (st==co-1)
    {
         document.getElementById("imgae_big_revelation").innerHTML="<img src=\"/product/ProductImg.aspx?Url="+arrImg[st]+"\"/>";
          document.getElementById("image_big_nav").innerHTML=""+(st+1)+"/"+co+" &nbsp;&nbsp;&nbsp;<a href='javascript:before("+st+")'> Before</a>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  Next";
    }
    else
    {
          document.getElementById("imgae_big_revelation").innerHTML="<img src=\"/product/ProductImg.aspx?Url="+arrImg[st]+"\"/>";
          document.getElementById("image_big_nav").innerHTML= ""+(st+1)+"/"+co+" &nbsp;&nbsp;&nbsp; <a href='javascript:before("+st+")'> Before</a> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <a href='javascript:next("+(st+1)+")'> Next </a>";
    }
  }
  function onclick_View_All()
  {
     var img_count=0;
     if (arrImg!=null)
     {
      img_count=arrImg.length;
     }
     if (img_count!=0)
     {
       document.getElementById("imgae_big_revelation").innerHTML="<img src=\"/product/ProductImg.aspx?Url="+arrImg[0]+"\"/>";
     }
     if (img_count>1)
     {
        document.getElementById("image_big_nav").innerHTML="1/"+img_count+" &nbsp;&nbsp;&nbsp;Before &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; <a href='javascript:next(1)'>Next </a>";
     }
     else
     {
       document.getElementById("image_big_nav").innerHTML="";
     }
    
  }