$(function (){
             var a = document.getElementById("a").value.substring(0,4)+"**********"+document.getElementById("a").value.substring(14,18);
            $("input[name='a']").val(a);
             var tel = document.getElementById("b").value.substring(0,3)+"*****"+document.getElementById("b").value.substring(8,11);
             $("input[name='b']").val(tel);
         });
         function fillmobile(){
             var tel=document.getElementById("c").value;
             document.getElementById("c").value = tel;
}