//HTML代码
    
        <table id="templateTable" >
            <tr>
                <td id="oneTd"  >
                    <div class="control-group">
                        <label class="control-label required"> <span
                            class="help-inline"><font color="red">*</font> </span>房间类型：
                        </label>
                        <div class="controls">
                            <input type="text" name="roomType" id="roomType1"  required="required" onblur="quchong(1)"/>
                        </div>
                    </div>
            </tr>
        </table>

//js

<script>    
    function addTr() {
        m = templateTable.rows[0].cells.length
        n = m + 1;
        var trHtml = $("#templateTable1 tr :first").html();
        trHtml = trHtml.replace(id="roomType1",id="roomType"+n);

        trHtml = trHtml.replace(onblur="quchong(1)",onblur="quchong"+"("+n+")");
        $("#templateTable tr").append(trHtml);
    }
</script>