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Editorial Team
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Asked: 2026-05-20T04:33:54+00:00

Hi I have a small problem. Currently I have 2 parameters saved in the

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Hi I have a small problem. Currently I have 2 parameters saved in the browser cookie which are ADV and LOC… Now I have a page with a form and the form got two hidden fields :

<input type="hidden" name="adv" value="" />
<input type="hidden" name="loc" value="" />

I need to get the values of adv and loc from the cookie and save them in the hidden form fields… How can i do this please? Thanks

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1 Answer

  1. Editorial Team

    document.cookie will get you all the cookies in the following format:

    'adv=adv_val; loc=loc_val;'

    To get a value from a cookie, you can use this function (from quirksmode):

    function readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
        var c = ca[i];
        while (c.charAt(0)==' ') c = c.substring(1,c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
    return null;
}

    To fill in the hidden fields, you can loop though all the hidden fields, and get their respective cookies:

    function hiddenCookies(){
  var inputs = document.getElementsByTagName('input');
  for(var i = 0; i < inputs.length; i++){
      var element = inputs[i];
      if(element.getAttribute('type') == 'hidden'){
          element.value = readCookie(element.name);
      }
  }
}

    And then modify <body> to have an onload.

    <body onload="hiddenCookies()">

    Or with jQuery:

    $(function(){
  $('input:hidden').each(function(i,v){
      v.value = readCookie(v.name);
  });
});
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