PopupLookup control, an alternative for AJAX?

var keepWindow;

function InsertValue(str_TextIdShown, str_TextIdHidden, str_Text, str_ValueIdHidden, str_Value)
{
    var objForm = window.document.forms[0];
    var objTextIdHidden = objForm[str_TextIdHidden];
    var objTextIdShown = objForm[str_TextIdShown];
    if (objTextIdShown != null)
    {
        //alert('HACK: normal mode!');
        objTextIdShown.value = str_Text;
        objTextIdHidden.value = str_Text;
    }
    else
    {
        alert('ERROR inserting value!');
    }
    
    var objHiddenControlId = objForm[str_ValueIdHidden];
    if (objHiddenControlId != null)
      objHiddenControlId.value = str_Value;
}

function NewPopup(str_URL, lng_Xsize, lng_Ysize, str_WindowName, bln_ShowScrollbar, bln_ShowAsFull, lng_ScreenLeft, lng_ScreenTop, bln_ShowStatus) { 
	var showMenubar = false;
	var showLocation = false;
	var windowResizable = false;
	var showStatus = true;
	var showToolbar = false;
	var newWindow;
	var vlcCommand = '';
	var lngDummySize = 0;

    if (bln_ShowAsFull) {
        showMenubar = true;
        showLocation = true;
        windowResizable = true;
        showToolbar = true;
    }
    
    if (bln_ShowAsFull == false) {
        windowResizable = false;
        if (bln_ShowStatus == false) {
            showStatus = false;
        }
    }


	if (!lng_Xsize)	lng_Xsize = 1000;
	if (!lng_Ysize)	lng_Ysize = 680;
	if (!bln_ShowScrollbar)	bln_ShowScrollbar = false;

	vlcCommand = 'width=' + lng_Xsize + ', height=' + lng_Ysize + '';
	vlcCommand += ', scrollbars=' + BoolToYesNo(bln_ShowScrollbar);
	vlcCommand += ', menubar=' + BoolToYesNo(showMenubar);
	vlcCommand += ', location=' + BoolToYesNo(showLocation);
	vlcCommand += ', resizable=' + BoolToYesNo(windowResizable);
	vlcCommand += ', status=' + BoolToYesNo(showStatus);
	vlcCommand += ', toolbar=' + BoolToYesNo(showToolbar);

    if (lng_ScreenTop) {
        if ((lng_ScreenTop + lng_Ysize) > screen.height) {
            lng_ScreenTop = screen.height - lng_Ysize;
            lng_ScreenTop -= 60;
        }
    }
	if (lng_Xsize && !lng_ScreenLeft) {
	    lngDummySize = screen.width;
	    lng_Xsize += 10; // compensate for window border;
	    if (lng_Xsize <= lngDummySize) 
	        lng_ScreenLeft = (lngDummySize - lng_Xsize) / 2;
	    else
	        lng_ScreenLeft = 0;
	}

	if (lng_Ysize && !lng_ScreenTop) {
	    lngDummySize = screen.height;
	    lngDummySize -= 29; // compensate for taskbar and titlebar
	    if (showStatus) lng_Ysize += 20;
	    if (lng_Ysize <= lngDummySize)
	        lng_ScreenTop = (lngDummySize - lng_Ysize) / 2;
	    
	    if (lng_ScreenTop < 14)
	        lng_ScreenTop = 0;
	    else
	        lng_ScreenTop -= 14;
	}
	vlcCommand += ', left=' + lng_ScreenLeft;
	vlcCommand += ', top=' + lng_ScreenTop;

    if ((!str_WindowName) || str_WindowName == '') {
        var objCurrentDate = new Date();
        str_WindowName = 'w_' + objCurrentDate.getTime();
    }
    //alert(str_URL);
  if (keepWindow)
  {
    keepWindow.close();
  } 
//	newWindow = window.open(str_URL, str_WindowName, vlcCommand);
	newWindow = window.open(str_URL, 'EFwindow', vlcCommand);
	keepWindow = newWindow;
	newWindow.focus();
}
function BoolToYesNo(boolValue) {
	if (boolValue == true) 
		return 'yes';
	else
		return 'no';
}