I want to display to lines of text in a Javascript confirm() function:
1ST line: ¿DO YOU REALLY WANT TO CANCEL THE OPERATION?
2ND line: ALL ENTERED DATA WILL BE LOST');
$('#button').click(function () {
    return confirm('¿DO YOU REALLY WANT TO CANCEL THE OPERATION? ALL ENTERED DATA WILL BE LOST');
});
DEMO: http://jsfiddle.net/8jEZZ/

Thank you.
Add \n and magic will happen!  
$('#button').click(function () {
    return confirm('¿DO YOU REALLY WANT TO CANCEL THE OPERATION? \n ALL ENTERED DATA WILL BE LOST');
});
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