<script src="JS/jquery-1.4.1.js" type="text/javascript"></script>

    <script type="text/javascript">

        jQuery(document).ready(function () {

            jQuery("#Button1").click(function () {

                var i = 0;

                i++;

                var table = jQuery("<table></table>");

                var tr1 = jQuery("<tr>"

                                + "<td><input id='checkbox" + i + "' type='checkbox' name='checkbox' /></td>"

                                + "<td>工具名：</td>"

                                + "<td><select id='Select1" + i + "'><option></option></select></td>"

                                + "<td>已借出：</td>"

                                + "<td><span id='desc" + i + "'>1000</span></td>"

                            + "</tr>");



                var tr2 = jQuery("<tr>"

                                + "<td></td>"

                                + "<td>现存：</td>"

                                + "<td><span id='span" + i + "'></td>"

                                + "<td>需求数量：</td>"

                                + "<td><input type='text'&