i have a problem with this code line:
alert($('input' + ' #' + $id_bici).attr('value'));
the HTML code is:
<input type="hidden" id="id_bici1" name="id_bici1" value="9">
the alert result is "undefined"
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5 Answers
You have a space between input and #. If you want the input with the specific id. Then there should not be a space between them.
var $id_bici = 'id_bici1'; //added for full example
alert($('input' + '#' + $id_bici).attr('value'));
1 Comment
Jon Surrell
And because it's an ID, and ID's are unique, you can drop input entirely from the selector and just use the ID.
var yourId = 1;
alert($('input' + '#id_bici' + yourId).attr('value'));
with yourId is 1 in your sample code.
Comments
You could do this:
alert($('#id_bici1').attr('value'));
Comments
There's a space too much:
alert($('input' + ' #' + $id_bici).attr('value'));
should be
alert($('input' + '#' + $id_bici).attr('value'));
Comments
Element1 Element2 is a selector that selects all Element2 inside Element1. So, "input #id" will select a element with id inside inputs. It's not your case. You already know the element id. Just use it.
$("id_bici1")
See CSS Selector Reference for a basic list of selectors.
var $id_bici = "id_bici1";
alert($('#' + $id_bici).attr('value'));<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="hidden" id="id_bici1" name="id_bici1" value="9">