<script language="javascript"> function addrows(){ var len = optionlist.rows.length; //得到table的行数 var obj = optionlist.insertRow(len);//在最后一行插入 /**插入第一列**/ obj.insertCell(0); obj.cells(0).innerHTML="选项" + (len+1) + "：<input type=text name=option size=28>"; } function deleterow(){ var len = optionlist.rows.length; if(len <= 1) { alert("至少要有一个选项"); } else { optionlist.deleteRow(len-1);//删除最后一项 } } function getOptionCount(){ return optionlist.rows.length; } </script>

<input type="button" id="bt1" value="添加选项" onClick="addrows();"> <input type="button" id="bt2" value="删除选项" onClick="deleterow();">

<table id="optionlist"> </table>