(谢谢各位,重新开贴发问)从数字一到数字五相加得到结果,给与数字六.代码如下.怎么不行?
<table   id= "tb1 "   name= "tb1 "   border=1>
<tr> <td> 开头一 </td> <td> 开头二 </td> <td> 开头三 </td> <td> 开头四 </td> <td> 数字一 </td> <td> 数字二 </td> <td> 数字三

</td> <td> 数字四 </td> <td> 数字五 </td> <td> 数字六(总和) </td> </tr>
<tr>
<td> 开头一 </td>
<td> 开头二 </td>
<td> 开头三 </td>
<td> 开头四 </td>
<td> <input   type= "text "> </td>
<td> <input   type= "text "> </td>
<td> <input   type= "text "> </td>
<td> <input   type= "text "> </td>
<td> <input   type= "text "> </td>
<td> <input   type= "text "> </td>
</tr>

<tr>
<td> 开头一 </td>
<td> 开头二 </td>
<td> 开头三 </td>
<td> 开头四 </td>
<td> <input   type= "text "> </td>
<td> <input   type= "text "> </td>
<td> <input   type= "text "> </td>
<td> <input   type= "text "> </td>
<td> <input   type= "text "> </td>
<td> <input   type= "text "> </td>
</tr>
</table>

<script   type= "text/javascript ">
var   table   =   document.getElementById( "tb1 ");
for(var   i=1;i <table.rows.length;i++){
var   row   =   table.rows[i];
row.cells[10].firstChild.readOnly= "true ";

row.cells[5].firstChild.onchange=row.cells[6].firstChild.onchange=row.cells

[7].firstChild.onchange=row.cells[8].firstChild.onchange=row.cells[9].firstChild.onchangefunction(){
row.cells[10].firstChild.value=row.cells[5].firstChild.value*1   +   row.cells

[6].firstChild.value*1   +   row.cells[7].firstChild.value*1   +   row.cells[8].firstChild.value*1   +   row.cells

[9].firstChild.value*1

}
}
</script>

------解决方案--------------------
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------解决方案--------------------
cell从0开始算，按照你的TABLE应该是从4开始
------解决方案--------------------
sorry,我的错,原来的代码只适用于1行,现在可以了
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<script type= "text/javascript ">
var table = document.getElementById( "tb1 ");
for(var i=1;i <table.rows.length;i++){
var row = table.rows[i];
row.cells[9].firstChild.readOnly= "true ";
row.cells[4].firstChild.onchange=row.cells[5].firstChild.onchange=row.cells[6].firstChild.onchange=row.cells[7].firstChild.onchange=row.cells[8].firstChild.onchange=function(){
var crow = this.parentElement.parentElement;
crow.cells[9].firstChild.value=crow.cells[4].firstChild.value*1 + crow.cells[5].firstChild.value*1 + crow.cells[6].firstChild.value*1 + crow.cells[7].firstChild.value*1 + crow.cells[8].firstChild.value*1;
}
}
</script>
------解决方案--------------------
<table id= "tb1 " name= "tb1 " border=1>
<tr> <td> 开头一 </td> &l