Link code

"javascript:openMdlWindow('InvestmentDetailOptions.aspx?IDAssetType=','620','600');if(window.document.RetValue == '2'){window.parent.LoadinIframe('InvestmentDetail.aspx?FromMenu=N&IDAssetType=','Investment Details > Full View','false');}"

My Code
$sel->click("link=Filter");
$sel->select_target_blank_window(30000);
$sel->get_eval("window.document.aspnetForm.ctl00_ContentPlaceHolder2_selectDay.value =".$pday);
$sel->get_eval("window.document.aspnetForm.ctl00_ContentPlaceHolder2_selectMonth.value =".$mnth);
$sel->click("ctl00_ContentPlaceHolder2_btnSubmit2");