Example of jQuery obtaining input, checkbox, radio, and select based on ID_jquery

input:

var xxx = $('#ID').val()

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checkbox:

var xxx = [ ];
$('input[name=MyName]:checked).each(function(index, element) {
xxx.push($(element).val());
// 或者 xxx.push($(this).val());
});

Note: This is not based on ID, which is a bit loose. If your checkbox element is a child element of a container (assuming the container's id is con_id), you can choose like this:

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$('#con_id input[name=MyName]:checked')
或者
$('input[name=MyName]:checked', '#con_id')

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radio:

var xxx = $(''input[name=MyName]:checked”).val();

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Note: Nothing based on ID here. To limit the specified ID, see the checkbox above

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select:

var xxx = $("#ID option:selected").val();

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Note two points:

1. The selected attribute of select is "seleted", not "checked".

2. Select is "single selection" by default. If it is multiple selection, I have not tried it. Presumably it can be handled with .each().