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Asked: 2026-06-06T17:22:53+00:00

So I got this: HTML <table id=mytable> <tr> <td> </td> <td> </td> </tr> <tr>

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So I got this:

HTML

<table id="mytable">
<tr>
   <td>

   </td>
   <td>

   </td>
</tr>
<tr>
   <td>
      3. Choose elements:
   </td>
   <td>
      <select name="antal_tidspunkter" id="antal_tidspunkter">
         <option value="1" SELECTED>1</option>
         <option value="2">2</option>
         <option value="3">3</option>
         <option value="4">4</option>
         <option value="5">5</option>
      </select>
   </td>
</tr>
    <tr class="highlightedRowStart">
   <td class="borderLeft">
      Time
   </td>
   <td class="borderRight">
      <select name="seats_timeclock[29]">
         <option value="08:00">08:00</option>
         <option value="08:30">08:30</option>
         <option value="09:00">09:00</option>
         <option value="09:30">09:30</option>
         <option value="10:00">10:00</option>
         <option value="10:30">10:30</option>
         <option value="11:00">11:00</option>
         <option value="11:30">11:30</option>
         <option value="12:00">12:00</option>
         <option value="12:30">12:30</option>
         <option value="13:00">13:00</option>
         <option value="13:30">13:30</option>
         <option value="14:00">14:00</option>
         <option value="14:30">14:30</option>
         <option value="15:00">15:00</option>
         <option value="15:30">15:30</option>
         <option value="16:00">16:00</option>
         <option value="16:30">16:30</option>
         <option value="17:00">17:00</option>
         <option value="17:30">17:30</option>
         <option value="18:00" SELECTED>18:00</option>
         <option value="18:30">18:30</option>
         <option value="19:00">19:00</option>
         <option value="19:30">19:30</option>
         <option value="20:00">20:00</option>
         <option value="20:30">20:30</option>
         <option value="21:00">21:00</option>
         <option value="21:30">21:30</option>
         <option value="22:00">22:00</option>
         <option value="22:30">22:30</option>
      </select>
   </td>
</tr>
<tr class="highlightedRowMiddle">
   <td class="borderLeft">
      2:
   </td>
   <td class="borderRight">
      <select name="seats_free_2tables[29]">
         <option value="0">0</option>
         <option value="1">1</option>
         <option value="2" SELECTED>2</option>
         <option value="3">3</option>
         <option value="4">4</option>
         <option value="5">5</option>
         <option value="6">6</option>
         <option value="7">7</option>
         <option value="8">8</option>
         <option value="9">9</option>
         <option value="10">10</option>
         <option value="11">11</option>
         <option value="12">12</option>
         <option value="13">13</option>
         <option value="14">14</option>
         <option value="15">15</option>
         <option value="16">16</option>
         <option value="17">17</option>
         <option value="18">18</option>
         <option value="19">19</option>
         <option value="20">20</option>
      </select>
   </td>
</tr>
<tr class="">
   <td class="borderLeft">
     4:
   </td>
   <td class="borderRight">
      <select name="seats_free_4tables[29]">
         <option value="0">0</option>
         <option value="1">1</option>
         <option value="2">2</option>
         <option value="3">3</option>
         <option value="4" SELECTED>4</option>
         <option value="5">5</option>
         <option value="6">6</option>
         <option value="7">7</option>
         <option value="8">8</option>
         <option value="9">9</option>
         <option value="10">10</option>
         <option value="11">11</option>
         <option value="12">12</option>
         <option value="13">13</option>
         <option value="14">14</option>
         <option value="15">15</option>
         <option value="16">16</option>
         <option value="17">17</option>
         <option value="18">18</option>
         <option value="19">19</option>
         <option value="20">20</option>
      </select>
   </td>
</tr>
<tr class="highlightedRowEnd">
   <td class="borderLeft">
      Converttable
   </td>
   <td class="borderRight">
      <select name="seats_converttables[29]">
         <option value="0">0</option>
         <option value="1">1</option>
         <option value="2" SELECTED>2</option>
         <option value="3">3</option>
         <option value="4">4</option>
         <option value="5">5</option>
         <option value="6">6</option>
         <option value="7">7</option>
         <option value="8">8</option>
         <option value="9">9</option>
         <option value="10">10</option>
         <option value="11">11</option>
         <option value="12">12</option>
         <option value="13">13</option>
         <option value="14">14</option>
         <option value="15">15</option>
         <option value="16">16</option>
         <option value="17">17</option>
         <option value="18">18</option>
         <option value="19">19</option>
         <option value="20">20</option>
      </select>
   </td>
</tr>
<tr class="spacer">
   <td></td>
</tr>
</table>

jQuery

$(document).ready(function() {

    $("#antal_tidspunkter").bind("change", function() {
        $("#mytable tr:gt(6)").remove();
        for (var i = 1; i < this.value; i++) {
            $("#mytable tr:gt(1):lt(5)").clone().appendTo("#mytable");
        }
    });
});

DEMO: http://jsfiddle.net/bTWQg/

Works like this, when you change the number of elements in the selector, it adds more elements.

My issue with this is that when it duplicate the element, it keeps the name: seats_timeclock[29] so later when I’m working with the handling of the form (PHP), I only receive one element’s data.

Is there anyway to add a random number inside [] from 11111, 99999 each time the element gets duplicated? Otherwise i can’t grab the data filled on the new elements..

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1 Answer

  1. Editorial Team
    $(document).ready(function() {

    // function to generate random number
    // between 1111 to 9999

    function randNum() {
        return Math.floor(Math.random() * (9999 - 1111 + 1)) + 1111;
    }

    $("#antal_tidspunkter").bind("change", function() {
        $("#mytable tr:gt(6)").remove();
        for (var i = 1; i < this.value; i++) {
            $("#mytable tr:gt(1):lt(5)")
                .clone()
                .find('select[name^=seats_timeclock]')
                attr('name', function() { // changing the name
                    return 'seats_timeclock_[' + randNum() + ']';
                })
                .end() // go back to clone element
                .appendTo("#mytable");
        }
    });
});

    DEMO

    Above code will work without changing HTML and with a single chain statement.

    According to your demo

    $(document).ready(function() {
    // function to generate random number
    function randNum() {
        return Math.floor(Math.random() * (9999 - 1111 + 1)) + 1111;
    }
    $("#antal_tidspunkter").bind("change", function() {
        $("#mytable tr:gt(6)").remove();
        for (var i = 1; i < this.value; i++) {
            var randnr = randNum();
            
            $("#mytable tr:gt(1):lt(5)")
                .clone()
                .find('select[name^=seats_timeclock]')
                .attr('name', function() { // changing the name
                    return 'seats_timeclock[' + randnr + ']';
                })
                .end() // need to put end to jump to clone
                .find('select[name^=seats_free_2tables]')
                .attr('name', function() { // changing the name
                    return 'seats_free_2tables[' + randnr + ']';
                })
                .end()  // need to put end to jump to clone
                .find('select[name^=seats_free_4tables]')
                .attr('name', function() { // changing the name
                    return 'seats_free_4tables[' + randnr + ']';
                })
                .end()  // need to put end to jump to clone
                .find('select[name^=seats_converttables]')
                .attr('name', function() { // changing the name
                    return 'seats_converttables[' + randnr + ']';
                })
                .end() // go back to clone element
                .appendTo("#mytable");
        }
    });
});

    DEMO

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