Open popup window with post request data in Javascript

 Open popup window with post request data using javascript:

                              

  function openWindowWithPostRequest() {

           var winName='MyWindow';

           var winURL='search.action';

           var windowoption='resizable=yes,height=600,width=800,location=0,menubar=0,scrollbars=1';

           var params = { 'param1' : '1','param2' :'2'};           

           var form = document.createElement("form");

           form.setAttribute("method", "post");

           form.setAttribute("action", winURL);

           form.setAttribute("target",winName); 

           for (var i in params) {

                 if (params.hasOwnProperty(i)) {

                     var input = document.createElement('input');

                     input.type = 'hidden';

                     input.name = i;

                     input.value = params[i];

                     form.appendChild(input);

                 }

           }             

           document.body.appendChild(form);                                   

           window.open('', winName,windowoption);

           form.target = winName;

           form.submit();                  

           document.body.removeChild(form);          

   }