Question

I am trying to increment a form field ID so they are all different when i click on the plus to create a new row of input fields.

Here is my code so far

//Order Form
    $("#add").click(function() {
        $('#ordertable tbody>tr:last').clone(true).insertAfter('#ordertable tbody>tr:last');
        $('#ordertable tbody>tr:last #prodcode').val('');
        $('#ordertable tbody>tr:last #meterage').val('');
        $('td.imgsample:last a').remove();
        return false;
    });

On the first line within the click function how can i change the input fields (prodcode & meterage) to be prodcode1 meterage1 e.t.c

Answer 1

Assuming you are going to do this more often then once.

//Somewhere global
var counter = 0;
//Order Form
$("#add").click(function() {
    counter++;
    var cln = $('#ordertable tbody>tr:last').clone(true);
    cln.find("[id^='prodcode'], [id^='meterage']").each(function(i, val) {
        val.id = val.id.match(/^([^0-9]+)[0-9]*$/)[1] + "" + counter;
    });
    cln.insertAfter('#ordertable tbody>tr:last');
    $('#ordertable tbody>tr:last #prodcode').val('');
    $('#ordertable tbody>tr:last #meterage').val('');
    $('td.imgsample:last a').remove();
    return false;
});

Of course there are “cleaner” solutions without using a global counter

For the problem mentioned in the first comment something along the lines of

$("tr [id^='prodcode'], tr [id^='meterage']").live("blur", function() {
    ....
    $(this).val() //instead of $("#prodcode").val()
    ....
});

should do