//document.write(' ┊  <a href="http://www.fenyou.net/" target="_blank">小说论坛</a>');
var userAgent = navigator.userAgent.toLowerCase();
 var is_opera = userAgent.indexOf('opera') != -1 && opera.version();
 var is_ie = (userAgent.indexOf('msie') != -1 && !is_opera) && userAgent.substr(userAgent.indexOf('msie') + 5, 3);
 function doane(event) {
  e = event ? event : window.event;
  if(is_ie) {
   e.returnValue = false;
   e.cancelBubble = true;
  } else if(e) {
   e.stopPropagation();
   e.preventDefault();
  }
 }
 //下拉菜单主函数
 function openListmenu(event,obj,code)
 {
  var top = 0 , left = 0;
  var tmpobj = obj;
  while( tmpobj.offsetParent )
  {
   top  += tmpobj.offsetTop;
   left += tmpobj.offsetLeft;
   tmpobj = tmpobj.offsetParent;
  }
  top += 20;//偏移量
  if($('list_menu_over'))return;
  doane(event);
  var menu = document.createElement('div');
  menu.id = 'list_menu_over';
  menu.className = 'list_menu_over';
  menu.style.top  =  top + 'px';
  menu.style.left =  left + 'px';
  var html = $(code).innerHTML;
  menu.innerHTML = html;
  document.body.appendChild(menu);
  document.onclick=function()
  {
   if($('list_menu_over'))document.body.removeChild($('list_menu_over'));
  }
 }