function flashmessage (messageNumber) {
    setTimeout('$("#trolley-top").css("background-color", "#f90")', 1250);
    setTimeout('$("#trolley-top").css("background-color", "")', 1500);
    setTimeout('$("#trolley-top").css("background-color", "#f90")', 1750);
    setTimeout('$("#trolley-top").css("background-color", "")', 2000);
    setTimeout('$("#trolley-top").css("background-color", "#f90")', 2250);
    setTimeout('$("#trolley-top").css("background-color", "")', 2500);
    $("#flashmessage_" + messageNumber).show();
    $("#flashmessage_" + messageNumber).animate({ marginTop: "-10px"}, 1000 );
    setTimeout("$('#flashmessage_" + messageNumber + "').animate({ marginTop: '-100px'}, 1000 )", 2500);
    setTimeout("$('#flashmessage_" + messageNumber + "').hide();",4000);
}