Set contents to iframe

function IsEdit(ID,i,companyId, companyType) {
       try {

           document.getElementById('hdnIsEdit').value = ID;
           document.getElementById('txtHistoryMessage' + ID).style.Width = "250" + "px";
           document.getElementById('txtHistoryMessage' + ID).style.Height = "250" + "px";
           document.getElementById('btnEdit' + ID).style.display = "none";

           jQuery.CcEditorPlugin($("#txtHistoryMessage" + ID), {
               style: "css/jquery.sceditor.default.min.css"
           });

           $('iframe')[1].contents().find('body')[0].innerHTML = document.getElementById('txtHistoryMessage' + (ID)).value; MatchHeights()
       }
       catch (ex) {
           alert(ex.Message());
       }
   }