Would like to use .fadeTo elegantly

Here's what I've got far, which works:

var X = $('#myID input:checked').length;
if (X) {
    $('input[name=Save]').show();
} else {
    $('input[name=Save]').hide();
}

What I'd like to do is writ开发者_JAVA技巧e this elegantly using the .fadeTo method.

$('input[name=Save]').fadeTo(Y)

Where Y=1 if X > 0 AND Y=0 if X = 0.

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Is this what you're after? It's not very elegant to read, but it's small (I haven't tested it, so tell me if it doesn't work):

$('input[name=Save]').fadeTo('fast', (X > 0) ? '1' : '0')

That random jargon stuff in the middle is basically what you originally wrote, but in a compact syntax. Here's a Wikipedia article about it, if you want to read it: http://en.wikipedia.org/wiki/%3F:#JavaScript

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Unless you want partial opacity, just use fadeIn('slow')/fadeOut('slow') instead of hide/show