javascript - Pass variable to getElementById -

i have multiple tables generated loop , each table have different ids. (table1,table2,table3 , on.) want pass these id getelementbyid function using jquery each function. here code

 $(document).ready(function () {     $('.table', this).each(function (index, element) {         tnames = $(element).attr('id');          //alert(tnames)         var elem5 = document.getelementbyid(tnames);         alert(elem5);      }); }); 

tnames alert fine. when pass tname getelementbyid function return null or object. want should return ids returning alert(tname);

any , suggestions. please?

i hope following code find element's id. following code alert table id.

$("document").ready(function () {                    var tableid= $('table').attr('id');          var element = document.getelementbyid(tableid);         alert(element.id);  });