收藏，对比功能的JS部分实现代码

<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>脚本之家</title> </head> <body> <script > var i=0; function addtable(i,id){ var aa; aa="<table id=s"+i+"><tbody><tr width=50><td>流水号<input style=\"border:none;background:d3e5f3\" size=4 type=\"text\" name=\"lsh\" value="+id+"></td><td>删除</td></tr></tbody></table>"; return aa; } function Delarhui(obj){ obj.removeNode(true); } function arhui(id){ if (checkid(id)){sc[sc.length]=id;train.innerHTML+=addtable(i++,id);} } //判断传入的id是否已经被选 var sc=[];//存放被选 function checkid(x){ if (sc.length>0){ var tmp=sc.join(); if (tmp.indexOf(x)>=0) { alert ("已收藏"); return false; } else return true } return true } </script> <form name="addtable"> 提交 </form> <table width="820" border="1" cellpadding="1" cellspacing="1"> <tr bordercolor="#FFFFFF" bgcolor="e7e7e7"> <td>操作</td> <td>流水号</td> </tr> <tr> <td>收藏</td> <td>1</td> </tr> <tr> <td>收藏</td> <td>2</td> </tr> <tr> <td>收藏</td> <td>3</td> </tr> <tr> <td>收藏</td> <td>4</td> </tr> <tr> <td>收藏</td> <td>5</td> </tr> <tr> <td>收藏</td> <td>6</td> </tr> <tr> <td>收藏</td> <td>7</td> </tr> <tr> <td>收藏</td> <td>8</td> </tr> <tr> <td>收藏</td> <td>9</td> </tr> <tr> <td>收藏</td> <td>10</td> </tr> <tr> <td>收藏</td> <td>11</td> </tr> <tr> <td>收藏</td> <td>12</td> </tr> <tr> <td>收藏</td> <td>13</td> </tr> <tr> <td>收藏</td> <td>14</td> </tr> <tr> <td>收藏</td> <td>15</td> </tr> <tr> <td>收藏</td> <td>16</td> </tr> <tr> <td>收藏</td> <td>17</td> </tr> <tr> <td>收藏</td> <td>18</td> </tr> </table> </body> </html>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]