onclick得问题

Question

大体上这个意思，参考下吧
<form name="form1" method="post" action="">
  <input type="button" name="Submit" value="-"  onclick="deleteRow()">
  <input name="num" type="text" value="3" size="4" maxlength="4">
  <input type="button" name="Submit2" value="+" onclick="insertRow()">
  <br>
  <table id="table1" width="500" border="0" cellspacing="0" cellpadding="0">
    <tr>
      <td width="87"><select name="select"></select></td>
      <td width="277"><input type="text" name="textfield1"></td>
      <td width="136"><input type="button" name="1" value="1"></td>
    </tr>
    <tr>
      <td><select name="select2"></select></td>
      <td><input type="text" name="textfield2"></td>
      <td><input type="button" name="2" value="2"></td>
    </tr>
    <tr>
      <td><select name="select3"></select></td>
      <td><input type="text" name="textfield3"></td>
      <td><input type="button" name="3" value="3"></td>
    </tr>
  </table>
</form>
<script language=javascript>
function deleteRow()
{
var obj=document.getElementById("table1")
var rowIndex=obj.childNodes[0].childNodes.length;
if(rowIndex>3)
{
document.getElementById("num").value=document.getElementById("num").value-parseInt(1)
obj.deleteRow(rowIndex-parseInt(1));
}
}
function insertRow()
{
var obj=document.getElementById("table1")
var rowIndex=obj.childNodes[0].childNodes.length;
var objTR=obj.insertRow(rowIndex);
var objTD1=objTR.insertCell();
var objTD2=objTR.insertCell();
var objTD3=objTR.insertCell();
rowIndex2=parseInt(rowIndex)+parseInt(1)
objTD1.innerHTML=obj.childNodes[0].childNodes[rowIndex-1].childNodes[0].innerHTML.replace(/(name=)(\")*(select)(\d)(\2)/gi,"$1$2$3"+rowIndex2+"$5")
objTD2.innerHTML=obj.childNodes[0].childNodes[rowIndex-1].childNodes[1].innerHTML.replace(/(name=)(\")*(textfield)(\d)(\2)/gi,"$1$2$3"+rowIndex2+"$5")
objTD3.innerHTML=obj.childNodes[0].childNodes[rowIndex-1].childNodes[2].innerHTML.replace(/(=)(\")*(\d)(\2)/gi,"$1$2"+rowIndex2+"$4")
document.getElementById("num").value=parseInt(document.getElementById("num").value)+parseInt(1)
}
</script>

Answer 1

＜a href="" name="mylink" onclick＝"add_text()"＞添加＜/a＞
<script language="javascript">
  function add_text()
  {
    mylink.innerHTML+='<input id="t1" type="text" >';
  }
</script>

Answer 2

<Script language="JavaScript" type="">
var cellID = 0;
//增加行
function addList(){
  cellID = cellID + 1;
  var row1 = tabfj.insertRow();
  row1.id = "r"+cellID;
  var cell1 = row1.insertCell();
  var ss1 = "<input type=\"file\" name=\"f\" size=\"30\" id=\"fjbt"+cellID+"\">";
  cell1.innerHTML = ss1;
  var cell2 = row1.insertCell();
  var ss2 = "&nbsp;&nbsp;<a href=\"#\" onclick=\"doDeleteRow('"+cellID+"')\">删除</a>";
  cell2.innerHTML = ss2;
}
//删除行
function doDeleteRow(l){
  tabfj.deleteRow(document.getElementById("r"+l).rowindex);
}
</Script>
<table id="tabfj">
</table>已经测试过，没问题

Answer 3

把addList()写到
<input type="button" name="add" value="增加列表" onclick="addList()" align="right" class="BUTTON">