There should be a supported way to refresh associated views e.g.

Xrm.Utility.refreshAssocGrid = function(rel){
try{
var w = window.opener.top.frames[0].document.getElementById(rel + "Frame").contentWindow;
if(w) w.document.getElementById('crmGrid_' + rel).control.refresh();
} catch(e){alert(e.Message || e.message);}

};