var WindowObjectReferenceOfRequestedPopup;
function OpenRequestedPopup(strUrl, strTarget){
if (WindowObjectReferenceOfRequestedPopup == null || WindowObjectReferenceOfRequestedPopup.closed){
 WindowObjectReferenceOfRequestedPopup = window.open(strUrl, strTarget, "resizable,scrollbars,status");
} else {
 if(WindowObjectReferenceOfRequestedPopup.focus){WindowObjectReferenceOfRequestedPopup.focus();};
 };
}