alert(document.getElementById("table1").rows[0].cells[0].innerHTML);

Question

<title></title>
<STYLE TYPE="text/css">
<!--
.dw0{COLOR:#000000;BACKGROUND:#ffffff;FONT:9pt "宋体";FONT-STYLE:normal;FONT-WEIGHT:normal;TEXT-DECORATION:none}
.dw8{COLOR:#000000;BACKGROUND:#ffffff;FONT:9pt "Arial", sans-serif;FONT-STYLE:normal;FONT-WEIGHT:normal;TEXT-DECORATION:none}
.dw10{COLOR:#000000;BACKGROUND:#ffffff;FONT:9pt "宋体", sans-serif;FONT-STYLE:normal;FONT-WEIGHT:normal;TEXT-DECORATION:none}
.dw110{COLOR:#000000;BACKGROUND:#ffffff;FONT:9pt "宋体";FONT-STYLE:normal;FONT-WEIGHT:normal;TEXT-DECORATION:none}
-->
</STYLE>
<script>
function go()
{
alert(document.getElementById("table1").rows[0].cells[0].innerHTML);//大家帮我看看我这里出了什么错误，怎么没有弹窗}
go();
</script>
<table id="table1">
<tr>
<tr><th ALIGN=center>卡号<th ALIGN=center>开始时间<th ALIGN=center>结束时间<th ALIGN=center>主叫号码<th ALIGN=center>被叫号码<th ALIGN=center>时长(秒)<th ALIGN=center>话费(分)<th ALIGN=center>费率种类<th ALIGN=center>计费记录标识<th ALIGN=center>附加费用
<tr>
<tr><td>90480750404<td>2010-10-09 16:05:13<td>2010-10-09 16:05:41<td>02038903627<td>06638892403<td>28<td>25<td>802<td>207<td>0
<tr>
<tr><td>90480750404<td>2010-10-18 09:57:55<td>2010-10-18 09:58:30<td>02038903627<td>06638892403<td>35<td>25<td>802<td>207<td>0
<tr>
<tr><td>90480750404<td>2010-10-25 15:46:56<td>2010-10-25 15:49:43<td>02038903627<td>075527513988<td>167<td>75<td>802<td>207<td>0
<tr>
<tr><td>90480750404<td>2010-10-25 15:56:33<td>2010-10-25 15:58:16<td>02038903627<td>075527513988<td>103<td>50<td>802<td>207<td>0
<tr>
<tr><td>90480750404<td>2010-10-25 16:05:47<td>2010-10-25 16:07:24<td>02038903627<td>075527513988<td>97<td>50<td>802<td>207<td>0
<tr>
<tr><td>90480750404<td>2010-10-25 16:10:49<td>2010-10-25 16:12:56<td>02038903627<td>075527513988<td>127<td>75<td>802<td>207<td>0
<tr>
<tr><td>90480750404<td>2010-10-25 16:15:56<td>2010-10-25 16:17:31<td>02038903627<td>075527513988<td>95<td>50<td>802<td>207<td>0
<tr>
<tr><td>90480750404<td>2010-10-25 16:31:37<td>2010-10-25 16:33:19<td>02038903627<td>075527513988<td>102<td>50<td>802<td>207<td>0
<tr>
<tr><td>90480750404<td>2010-10-25 16:38:35<td>2010-10-25 16:40:36<td>02038903627<td>075527513988<td>121<td>75<td>802<td>207<td>0
<tr>
<tr><td>90480750404<td>2010-10-29 16:47:01<td>2010-10-29 16:48:59<td>02038903627<td>075527513988<td>118<td>50<td>802<td>207<td>0
<tr>
<tr><td>合计:共10张<td><td><td><td><td>通话时长:993<td>总金额 : 5.25(元)<td><td><td>
</table>

Answer 1

<script>
function go()
{
alert(document.getElementById("table1").rows[0].cells[0].innerHTML);//大家帮我看看我这里出了什么错误，怎么没有弹窗}
window.onload=function(){go();};
</script>或者把 script 放到最后面

Answer 2

既然是弹出,就先获取值试试,
把innerHTML换成别的,看你的ID取值到了没有,这个才是重点

Answer 3

function go()
{
alert(document.getElementById("table1").rows[0].cells[0].innerHTML);//大家帮我看看我这里出了什么错误，怎么没有弹窗}
window.onload=function(){go();};==>
window.onload = function() {   alert(document.getElementById("table1").rows[0].cells[0].innerHTML);
}