JSP动态添加和删除表格中的行与列

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<%@ page language="java" contentType="text/html; charset=GB18030"
    pageEncoding="GB18030"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>Insert title here</title>
<script>
        function addRow(obj)
        {
        var newTr = testTbl.insertRow();
       
        var newTd0 = newTr.insertCell();
       
        var newTd1 = newTr.insertCell();
        var newTd2 = newTr.insertCell();
       
        newTd0.innerHTML = '<input type="text" name="test1">';
        newTd1.innerHTML= '<input type="button" onclick="DelRowNew(this);" value="-">';
        newTd2.innerHTML= '<input type="button" onclick="addRow(this);" value="+">';
       
        }       
        function test(){

         var test1 = document.getElementsByName("test1");
         alert(test1.length);
         
        }
        function DelRowNew(r){
        var i=r.parentNode.parentNode.rowIndex;
        document.getElementById('testTbl').deleteRow(i);
        }

    </script>
</head>

    <body>
        <table id="testTbl">
            <tr id="tr1">
                <td ><input type="text" name="test1"></td>
                <td id="b"><input id = "inputb" type="button" onclick="DelRowNew(this);" value="-"></td>
                <td id="b"><input id = "inputb" type="button" onclick="addRow(this);" value="+"></td>
               
            </tr>
           
        </table>       

   <input type="button" onclick="test();" value="test">
    </body>

</html>

 

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