Examples similar to GMail

I think it is an iFrame that is used

[Alternative Future]

Hello to the forum,

I was wondering if someone could post me some examples that are similar to GMail when you are replying to a message an alert comes up in the bottom right saying that the person has replied to your last email.

TIA,

-Gs

[Alternative Future]

Ok I have found something that partically does what I am after by using the MS filters and transitions. Example:
<div id=imgObjText style="FILTER: progid:DXImageTransform.Microsoft.GradientWipe(GradientSize=0.00,wipestyle=1,motion=reverse); background-color: transparent; position: absolute;"></div>

I then use:
imgObjText.filters[0].apply();
imgObjText.innerHTML = 'myCode'
imgObjText.filters[0].play();

I was wondering does anyone know how to reverse the above script? The layer now slides in and displays the message, I would like to call another script to slide the layer off and remove the message using this filter.

Again thanks in advance,

-Gs