Q1...
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$('.answer-item :radio', thisQuestion)

$.ajax({ url: check_quota_url, . . .

$(document).keypress(function (e)
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if(key == 61 || key == 43 ) // the enter key code
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$('#answer645263X5X10146Val1-Like').click();
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$('#answer645263X5X10146Val1-Dis').click();
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Val1-Like

Val1-Dis