jQuery to clone a table with new id, how to write below code collectively

I'm having trouble with some jQuery stuff, please help me out. Below is my form structure:

<form name="imageUploadForm" id="imageUploadForm" action="" method="POST" enctype="multipart/form-data" >
   <table border="0" width="80%" cellpadding="2" cellspacing="3" id="mainTable">
   <tbody>
    <tr>
            <td> 
                  <table border="0" id="imageTable" class="imageTable">
                    <tr>
                      <td><label for="image_title"><sup>*</sup>Image Title:</label></td>
                      <td><input type="开发者_StackOverflow社区text" name="image_title[]" id="image_title[]"></td>
                    </tr>
                    <tr>
                      <td><sup>*</sup>Image:</td>
                      <td><input type="file" name="main_image[]" id="main_image[]" ></td>
                    </tr>
                  </table>
            </td>
        </tr>
    </tbody>
    <tfoot>
        <tr>
            <td colspan="2"><input type="button" id="addRow" value="Add More" /></td>
        </tr>
    </tfoot>
    </table>    
</form> 

What I want is this: when I click on an Add More Button, a new table (i.e. clone of imagetable) appends to mainTable, here is my jQuery Code:

jQuery(document).ready(function() {
    var count=1;
    jQuery('#addRow').click( function () {
        var Clonedtable = jQuery("#imageTable").clone(true);
        Clonedtable.appendTo('table#mainTable');
    })
});

• I need to create different IDs for table, and the two inputs
• Is it valid to make an array of IDs?
• I want to append the cloned table append the tbody's last table, not just after the main ImageTable
• Both inputs should be empty.

Please suggest me optimized method. Thanks.

UPDATE: i have changed the table structure ( i was wrong before ), i want to change for attribute value of label according to next input id and delete <sup>*</sup> tag. i write below code, everything is working fine, but i need to write collectively, i don't understand how to write it collectively, please suggest me

 jQuery('#addRow').live('click', function () {
        var quantity = jQuery('table[class^=imageTable]').length;
        var clonedRow = jQuery('#mainTable > tbody > tr:first').clone(true);
        var textID = clonedRow.find(':text').attr('id');
        clonedRow.find('label').attr('for', function () {
            return textID + quantity;
        });
        clonedRow.find('th').text('Image '+(++quantity) + ' :');
        clonedRow.find('sup').remove();     
        clonedRow.attr('id', function () {
            return this.id + quantity;
        }).find(':text,:file').attr('id', function () {
            return this.id + quantity;
        }).val('').end().appendTo('#mainTable');
    });

EDIT: There are some issues with accessing properties of cloned elements. I changed the answer to use the native getAttribute and setAttribute instead.

jQuery('#addRow').click(function() {
    // Get current count of imageTables and use that value for IDs
    var quantity = jQuery("table[id^=imageTable]").length;

    // clone the table
    var clone = jQuery("#imageTable").clone(true);

    // use native DOM methods to update the ID
    clone[0].setAttribute('id', clone[0].getAttribute('id') + quantity);

    // find any text or file inputs, and iterate over them
    clone.find(':text,:file').each(function() {
          // use native DOM methods to update the ID
        this.setAttribute('id', this.getAttribute('id') + quantity);
          // set the value to ""
        this.value = "";
    });
     // append to the <td>
    clone.appendTo('#mainTable > tbody:last > td');
});​

Original answer:

Try this:

<script type="text/javascript">
    jQuery(document).ready(function() {
        jQuery('#addRow').click( function () {
                   // Get current count of imageTables and use that value for IDs
            var quantity = jQuery("table[id^=imageTable]").length;
                   // Clone the main table
            jQuery("#imageTable").clone(true)
                   // Change its ID to the current ID plus the quantity variable
                 .attr( 'id', function() { return this.id + quantity; })
                   // find any text or file inputs
                 .find( ':text,:file' )
                   // change their IDs
                 .attr( 'id', function() { return this.id + quantity; })
                   // set the input values to ""
                 .val( "" )
                   // return to the cloned table
                 .end()
                   // append wherever you want it.
                   // As the comment below your question states,
                   //   this is not a valid placement
                 .appendTo('#mainTable > tbody:last');
        })
    });
</script>

EDIT: Fixed typo in .find() where the comma was outside the quotation marks.

if you want to keep simple change

          var table= $(".imageTable").html();
          table.appendTo("#mainTable");

You're trying to append the cloned element to the wrong element, you're targeting table#mainTable, when you really want to append it to the tbody.

Change this line

Clonedtable.appendTo('table#mainTable');

To this

Clonedtable.appendTo('table#mainTable tbody');

But you really don't want to do that either. You really shouldn't have any tables directly in a tbody, but rather a td element.