how to load alexa graphs with javascript

[darkc99]

my java scripting is week ..... so i want to ask that i have alexa traffic graphs links and i want to Load them with javascript when use click desire tab ( see image) so how to do that .
http://i1102.photobucket.com/albums/g453/darkc99/sss.png

 <!--Daily Traffic Rank Trend-->
<script language="JavaScript" type="text/javascript" src="http://xsltcache.alexa.com/traffic_graph/js/g/b/6m?&amp;u=http%3A%2F%2Fwww.yoursite.com+++++"></script>
<!--Daily Traffic Rank Trend-->
<img src="http://traffic.alexa.com/graph?&amp;w=400&amp;h=220&amp;o=f&amp;c=1&amp;y=t&amp;b=ffffff&amp;r=1m&amp;u=yoursite.com&amp;">
<!--Daily Reach in Percent-->
<img src="http://traffic.alexa.com/graph?&amp;w=400&amp;h=220&amp;o=f&amp;c=1&amp;y=r&amp;b=ffffff&amp;r=1m&amp;u=yoursite.com&amp;">
<!--Daily Page Views-->
<img src="http://traffic.alexa.com/graph?&amp;w=400&amp;h=220&amp;o=f&amp;c=1&amp;y=p&amp;b=ffffff&amp;r=1m&amp;u=yoursite.com&amp;">