Do the following steps speed up things?

I want to show a map on page2. People click on a link in page1 to get
to page2. Does it make sense to pre-load the MapKey in page1 like
that: <script src="http://maps.google.com/maps?
file=api&amp;v=2&amp;key=... ???

from my experiments it seems it contacts the http://maps.google.com
page also on page2 even if it already did so on page1. I may be wrong.


Also I want to show a AreaChart and Gauge visualization on page2. Does
it make sense to pre-load the visualizations on page1 like that:

<script type="text/javascript" src="http://www.google.com/jsapi";></
script><script type="text/javascript">google.load('visualization',
'1', {packages:['areachart', 'gauge']});</script>

Will the browser only load it once and thus save time when visiting
page2? Do I have to include the scripts nonetheless in page2 although
I am sure that people get to page1 first where the scripts are already
loaded?

Thanks!
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