// JavaScript Document
function nTabs(Obj,Num,length){
for(i=0; i <length; i++)
{
  if (i == Num)
  {
   document.getElementById(Obj+i).style.display = "block";
  }else{
  document.getElementById(Obj+i).style.display = "none";
  }
} 
}

var h = 0;  //设置当前显示高度 
function loadImage(url,callback){ 
    var img = new Image(); 
    img.src = url; 
    if(img.complete){   //判断图片是否加载完成 
        callback.call(img); 
        return; 
    } 
    img.onload = function(){    //图片加载 
        callback.call(img); 
    } 
} 
function imgLoaded(){ 
    document.getElementById("myImgs").src = this.src;   //获得图片地址 
    showImage(this.height);     //图片展开 
} 
function showImage(height){ 
    if(h < height){ 
        h = h + 5; 
    }else{ 
        setTimeout("hideImage("+height+")",3000);   //图片全部展开后，设置多少秒之后关闭图片 
        return; 
    } 
    var div = document.getElementById("myDiv"); 
    var img = document.getElementById("myImgs"); 
    div.style.display = "block"; 
    div.style.height = h + "px"; 
    setTimeout("showImage("+height+")",30); 
} 
function hideImage(height){ 
    if(h > 0){ 
        h = h - 5; 
    }else{ 
        var divs = document.getElementById("myDiv"); 
        divs.style.display = "none";    //图片关闭后隐藏该层 
        return; 
    } 
    var div = document.getElementById("myDiv"); 
    var img = document.getElementById("myImgs"); 
    div.style.display = "block"; 
    div.style.height = h + "px"; 
    setTimeout("hideImage("+height+")",30); 
}