Question

I got a simple increment function like this:

  $(function(){
    $("#inc").click(function(){
        var value = parseInt($(":text[name='ice_id']").val()) + 1;
        $(":text[name='ice_id']").val(value);
    });
    $("#dec").click(function(){
        var value = parseInt($(":text[name='ice_id']").val()) - 1;
        $(":text[name='ice_id']").val(value);
    });
});

the ice_id text field is embedded within a form

<form id="masterSubmit" name="masterSubmit" action="" method="post">
     <td><input id="ice_id" type="text" name="ice_id" size="16" maxlength="15"></td>
</form>

When I try now to increment , it successfully increments a number, but shows the following weird behavior:
It ‘refreshes’ the site, so that the content of the text field is gone. This behavior disappears, if I comment out the form tags …unfortunately the form tags are required for an AJAX-submit.

Are there any ways to avoid this problem?

Thanks in advance for any hints and
best regards

Daniyal

Answer 1

just do a return false;

$(function(){
    $("#inc").click(function(){
        var value = parseInt($(":text[name='ice_id']").val()) + 1;
        $(":text[name='ice_id']").val(value);
        return false;
    });
    $("#dec").click(function(){
        var value = parseInt($(":text[name='ice_id']").val()) - 1;
        $(":text[name='ice_id']").val(value);
        return false;
    });
});

you may also improve your codes to:

$(function(){
    $("#inc").click(function(){

        $(":text[name='ice_id']").val(function(index, value) { return value++; });
        return false;

    });
    $("#dec").click(function(){

        $(":text[name='ice_id']").val(function(index, value) { return value--; });
        return false;

    });
});