Answers for "jquery input check"

jquery checkbox checked value

if ($('#check_id').is(":checked"))
{
  // it is checked
}

jquery selector checked

$("input:checked")

jquery checkbox

if($("#isAgeSelected").is(':checked'))
    $("#txtAge").show();  // checked
else
    $("#txtAge").hide();  // unchecked

jquery check input

$( "input" ).prop( "checked", true );