在线求助！！急！！！关于indexof

[kmdli]

求助，我要在页面中判断两个条件，要两个条件同时成立，比如说一个a字段和b字段，a字段相同的话b字段就不能相同，否则报错；b字段相同的话a字段相同不相同都可以，总之就是不能两者同时相同，我象下面这样写报错啊，希望有高手能解决
代码如下：
var pkArray = "";
for (i = 1; i < tablelength; i++) {
var row = myTable.rows[i];
if (pkArray.indexOf("," +row.cells[2].childNodes[0].value +",") == -1 && pkArray.indexOf("," +row.cells[1].childNodes[0].value +",") == -1){
pkArray +="," + row.cells[2].childNodes[0].value + ",";
pkArray +="," + row.cells[1].childNodes[0].value + ",";
}
else alert("字段名不可重复");
if (document.getElementById("myTable").style.display !=
"none") {
row.cells[2].childNodes[0].focus();
}
return false;
}
}

[chaoliu1]

是这样吗？
<table id="myTable">
<tr>
<td>字段名</td><td>注释</td>
</tr>
<tr>
<td>学号</td><td>请输入学号</td>
</tr>
<tr>
<td>姓名</td><td>请输入姓名</td>
</tr>
<tr>
<td>姓名</td><td>请输入性别</td>
</tr>
</table>
<input type=button value="判断" onclick="f()">
<script language=javascript>
var a=document.getElementsByTagName("TD");
for(i = 2; i < a.length; i++)a[i].innerHTML="<input type=text value="+a[i].innerHTML+">";

function f(){
var pkArray = "";
for(i = 0; i < myTable.rows.length; i++) {
var row = myTable.rows[i];
if (pkArray.indexOf("," +row.cells[1].childNodes[0].value +",") == -1 && pkArray.indexOf("," +row.cells[0].childNodes[0].value +",") == -1){
pkArray +="," + row.cells[1].childNodes[0].value + ",";
pkArray +="," + row.cells[0].childNodes[0].value + ",";
}
else{
alert("字段名不可重复");
if(document.getElementById("myTable").style.display != "none")row.cells[0].childNodes[0].focus();
return false;}
}


}
</script>

[zhanbanie]

怎么没有人来回？
我也想知道

[striker_un]

是数据库中的组合键效果。