JavaScript - after triggering postback in javascript & continue to take innerhtml

function postback() {

    var btnAdd = document.getElementById('btnAdd');

   javascript: __doPostBack('btnAdd', '');
  
}



function copy() {


    postback();  
    
  
    
    var isValid = true;
    var idprefix = 'ctl00_ContentPlaceHolder1_';

    var tbl = document.getElementById('tblDynamic');

    alert(tbl.innerHTML);



}

here in above code i can't able to do anything after postback function , i want to call simultaneously next function to get innerhtml in my next function

You should  call  __doPostBack at the last, after all your logic is executed.


Regards