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Check If One Checkbox Is Checked

/ Published in: jQuery
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Copy this code and paste it in your HTML 
  1. $("#formId").submit(function(){
  2.     var checked = $("#formId input:checked").length > 0;
  3.     if (!checked){
  4.         alert("Please check at least one checkbox");
  5.         return false;
  6.     }
  7. });

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