怎么合并表格中同一列内容相同的行?

<p><font>这是本人写的一个函数<br/>
function uniteSameCells(tableId,subjectIndex) {<br/>
  if(subjectIndex==null) {<br/>
     subjectIndex=1;<br/>
  }<br/>
  var oTable = eval(tableId);<br/>
  var oTrs = oTable.rows;<br/>
  var lTr = oTrs.length;<br/>
  var subject = null;<br/>
  var subjectTd = null;<br/>
  var subjectStartIndex = -1;<br/>
  for(var i=0; i&lt;lTr; i++) {<br/>
    var oTds = oTrs[i].cells;<br/>
    if(oTds.length&gt;=subjectIndex) {<br/>
      var tempSubject = oTds[subjectIndex-1].innerText;<br/>
      if(subjectStartIndex==-1) {<br/>
        subjectTd = oTds[subjectIndex];//<br/>
        subject = tempSubject;//<br/>
        subjectStartIndex = i; //<br/>
      } else {<br/>
        if(subject==tempSubject) {<br/>
          //oTds[subjectIndex].innerText="";<br/>
          oTds[subjectIndex-1].removeNode(true);<br/>
        } else {<br/>
          //union the td<br/>
          subjectTd.rowSpan = i - subjectStartIndex;<br/>
          //<br/>
          subjectTd = oTds[subjectIndex-1];<br/>
          subject = tempSubject;<br/>
          subjectStartIndex = i;<br/>
        }<br/>
      }<br/>
    }<br/>
  }</font></p>
<p><font>  if(subjectStartIndex = -1) {<br/>
    subjectTd.rowSpan = i - subjectStartIndex;<br/>
    subjectTd = null;<br/>
    subject = null;<br/>
    subjectStartIndex = -1;<br/>
  }<br/>
}</font></p>

你的for()没有全

楼主粗心大意，这个函数不报错才怪。