document.write("<table border='0' cellspacing='0' cellpadding='0'><tr><td><a href='/Item/list.asp?id=1195'>设备单元</a></td></tr><tr class='parItem' name='parItem'>   <td><a href='/Item/list.asp?id=1196'>沼气工程</a>   </td></tr><tr class='parItem' name='parItem'>  <tr class='parItem' name='parItem'>   <td><a href='/Item/list.asp?id=1197'>CSTR工艺</a>   </td></tr><tr class='parItem' name='parItem'>   <td><a href='/Item/list.asp?id=1199'>推流式污泥处理工艺</a>   </td></tr><tr class='parItem' name='parItem'>   <td><a href='/Item/list.asp?id=1206'>生活污水处理工程</a>   </td></tr><tr class='parItem' name='parItem'>   <td><a href='/Item/list.asp?id=1207'>工业废水处理工程</a>   </td></tr><tr class='parItem' name='parItem'>   <td><a href='/Item/list.asp?id=1208'>美丽乡村建设</a>   </td></tr></table>");$(document).ready(function() {   var tr = $("tr.parItem td");   tr.each(function(i, item) {     var ul = $(this).children("ul");     var a = $(this).children("a.pa");     if (ul.size() > 0) {      a.click(function() {       if (ul.css("display")!=="none") {        ul.hide("slow");        }       else {           ul.show("slow");            }         });         }     }); });