function openWindow(url, width, height) {

    var newWidth = width + 50;
    var newHeight = height + 50;

    var leftPos = window.screenLeft + (window.document.body.clientWidth - newWidth) / 2;
    var topPos = window.screenTop + (window.document.body.clientHeight - newHeight) / 2;

    var newWindow = window.open(url, 'popup_window', 'toolbar=no,location=no,directories=no,status=no,menubar=no, scrollbars=yes,resizable=yes,width=' + newWidth + ',height=' + newHeight + ',left=' + leftPos + ',top=' + topPos);
    newWindow.focus();

}

function confirm_delete(itemName)
{
	if (confirm('Are you sure you want to delete this ' + itemName + '?'))
	{
		return true;
	}
	else
	{
		return false;
	}

}