用JS获取表格单元中的数据

 <table width="100%" border="0" cellpadding="0" cellspacing="0" bgcolor="#F2EDF8" id="otbl">

<TR bgcolor="#EAE2F3">

<td height="25" class=td_hz_bj><p align="center">课程号</p></td>

<td height="25" class=td_hz_bj><p align="center">课程名</p></td>

<td height="25" class=td_hz_bj><p align="center">序号</p></td>

<td height="25" class=td_hz_bj><p align="center">学分</p></td>

<td height="25" class=td_hz_bj><p align="center">考试时间</p></td>

<td height="25" class=td_hz_bj><p align="center">总成绩</p></td>

<td height="25" class=td_hz_bj><p align="center">替代课程号</p></td>

<td height="25" class=td_hz_bj><p align="center">考试类型</p></td>

<td height="25" class=td_hz_bj><p align="center">备注</p></td>

</TR>

<TR>

<td width="60" height="20" class=td_biaogexian><p align="center">04030071b</p></td>

<td width="200" height="20" class=td_biaogexian><p align="center">基础会计学(B)</p></td>

<td width="40" height="20" class=td_biaogexian><p align="center">3</p></td>

<td width="40" height="20" class=td_biaogexian><p align="center">3</p></td>

<td width="40" height="20" class=td_biaogexian><p align="center">20080715</p></td>

<td width="40" height="20" class=td_biaogexian><p align="center">优</p></td>

<td width="60" height="20" class=td_biaogexian><p align="center"></p></td>

<td width="60" height="20" class=td_biaogexian><p align="center">考查</p></td>

<td width="60" height="20" class=td_biaogexian><p align="center">&nbsp;</p></td>

</TR>

<TR>

<td width="60" height="20" class=td_biaogexian><p align="center">04040016a</p></td>

<td width="200" height="20" class=td_biaogexian><p align="center">操作系统</p></td>

<td width="40" height="20" class=td_biaogexian><p align="center">1</p></td>

<td width="40" height="20" class=td_biaogexian><p align="center">4</p></td>

<td width="40" height="20" class=td_biaogexian><p align="center">20080715</p></td>

<td width="40" height="20" class=td_biaogexian><p align="center">88</p></td>

<td width="60" height="20" class=td_biaogexian><p align="center"></p></td>

<td width="60" height="20" class=td_biaogexian><p align="center">考试</p></td>

<td width="60" height="20" class=td_biaogexian><p align="center">&nbsp;</p></td>

</TR>

</table>

 

<INPUT TYPE="button" value="提取" onclick="show()">

<SCRIPT LANGUAGE="JavaScript">

<!--

var arrScore = new Array();

var arrScore1 = new Array();

function show(){

var otbl = document.getElementById("otbl");

var rows = otbl.rows;

for(var i=1; i<rows.length; i++){

 arrScore.push(rows[i].cells[3].innerText);

arrScore1.push(rows[i].cells[5].innerText);

}

alert("学分:"+arrScore);

alert("成绩:"+arrScore1);

}

//-->

</SCRIPT>