Load Page Tanpa Menghilangkan Data Sebelumnya

window.onload = function() {
      var nama = getCookie('nama');

      document.getElementById('nama_field').value=nama;
}

 function setCookie(cname,cvalue,exdays) {
      var d = new Date();
      d.setTime(d.getTime() + (exdays*24*60*60*1000));
      var expires = "expires=" + d.toGMTString();
      document.cookie = cname+"="+cvalue+"; "+expires;
}

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

        function cek_tanggung_jawab(uname,val) {

            if (val != "" && val != null) {
                setCookie("temp_tanggung_jawab", val);
            }
        }