JavaScript实现鼠标悬停显示缩略图

// JScript 文件
showPhoto =
{
     containerID:'container',
     init:function()
     {
         if(!document.getElementById||!document.createTextNode)

          {return;}
           //取到table标签
           showPhoto.table=document.getElementsByTagName('table');
           if(!showPhoto.table){return;}
           //取到姓名的超链接
           var namelinks=document.getElementsByTagName('a');
           showPhoto.all=namelinks.length;
  
           for(var i=0;i<showPhoto.all;i++)
           {
             namelinks[i].attachEvent('onmouseover',showPhoto.show);
            
             namelinks[i].attachEvent('onmouseout',showPhoto.hide);
           }
          
           showPhoto.creatContainer();
     },
   
    show: function(e)
    {
        var t=window.event.srcElement;
        var x=t.offsetLeft;
        var y=t.parentNode.offsetTop;
        //alert(x+'+'+y);
        var str=new String(t);
//alert(str);
        var photoURL='http://localhost:1903/List'+str.slice
        (str.indexOf("~")+1,str.length);
//alert(photoURL);
        showPhoto.setPic(photoURL);
        showPhoto.c.style.top=y+190;
        showPhoto.c.style.left=x-120;
        //showPhoto.c.style.width=100;
        showPhoto.c.style.position='absolute';
    },
   
    creatContainer:function()
    {
       showPhoto.c=document.createElement('div');
   showPhoto.c.id=showPhoto.containerID;
       var p=document.createElement('p');

       showPhoto.c.appendChild(p)
       if(!showPhoto.table[0]){return;}
       showPhoto.table[0].parentNode.appendChild(showPhoto.c);     
    },
   
    hide:function()
    {
       var p=showPhoto.c.getElementsByTagName('p')[0];
       p.innerHTML='';
    },
   
    setPic:function(pic)
    {

      //注意此处的[0]不可丢
       var picture=showPhoto.c.getElementsByTagName('p')[0];
       picture.innerHTML='';

          showPhoto.c.className='show';
          var i=document.createElement('img');
          i.setAttribute('src',pic);
          if(i.width>200)
          {
             i.width=180
          }
          if(i.height>250)
          {
             i.height=250
          }
          picture.appendChild(i);
    }
}
window.onload=showPhoto.init;