js通过行列获取表格中input的值

 1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
 2 <HTML>
 3 <HEAD>
 4 <TITLE>New Document</TITLE>
 5 <META NAME="Generator" CONTENT="EditPlus">
 6 <META NAME="Author" CONTENT="">
 7 <META NAME="Keywords" CONTENT="">
 8 <META NAME="Description" CONTENT="">
 9 </HEAD>
10 
11 <BODY>
12     <TABLE width="100%" border="1" id="tb">
13         <TR>
14             <TD><INPUT TYPE="text" NAME="a1" value="张三"></TD>
15             <TD><font color="red">男</font></TD>
16             <TD>21</TD>
17         </TR>
18         <TR>
19             <TD><INPUT TYPE="text" NAME="a2" value="李四"></TD>
20             <TD><font color="red">女</font></TD>
21             <TD>19</TD>
22         </TR>
23     </TABLE>
24     <SCRIPT LANGUAGE="JavaScript">
25     <!--
26         getValue();
27         function getValue() {
28             alert("表格总行数=" + tb.rows.length);
29             for (i = 0; i < tb.rows.length; i++) {
30                 Names = tb.rows[i].cells[0].getElementsByTagName("INPUT")[0].value;
31                 gender = tb.rows[i].cells[1].innerHTML;
32                 age = tb.rows[i].cells[2].innerText;
33                 alert(Names);
34                 alert(gender);
35                 alert(age);
36             }
37         }
38     //-->
39     </SCRIPT>
40 </BODY>
41 </HTML>