对滚动条添加JS事件详解编程语言

jQuery(function (){ 
        var i = 2; 
        jQuery("#doctor_list").bind("scroll", function (event) { 
   var obj = document.getElementById("doctor_list"); 
   var flag = document.getElementById('flag').value; 
   if (((obj.scrollHeight - obj.scrollTop) <= 700) && (flag == "1") && ($('add_ajax').value == '1')) 
   { 
    $('add_ajax').value = '0'; 
    add_data(i); 
    i++; 
   } 
  }); 
 }); 
  
 function add_data(i){ 
  var a_data = document.getElementById("ddata_span"); 
  var flag = document.getElementById('flag').value; 
  if (flag == "1") { 
   a_data.innerHTML = "<table><tr><td><img src='/images/loading.gif' />&nbsp;&nbsp;</td><td><font size='2'>読み込み中...</font></td><tr/></table>"; 
   new Ajax.Request("/admin/doctor/add_data", { 
    asynchronous: true, 
    evalScripts: true, 
    parameters: 'page=' + i + '&branch=<%=params[:branch]%>&office=<%=params[:office]%>&user=<%=params[:user]%>', 
   }); 
  } 
 };