Get the value of id from spans inside a div using jquery

I want to get the id value from the span开发者_运维百科s.

Thanks Jean

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var ids = $('div span').map(function() {
    return $(this).attr('id');
});

Your question isn't very clear so this is all I can come up with.

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$('span').each(function() {
    alert(this.id);
});