Note: script broken into separate lines for legibility -- must be all one line for actual use.
<script src='http://www.plugandplaymaps.com/js/?k=4ab87cad9e43869c
&grouptype1=radio&groupdatafile1=hosted:statepop1960-2000.csv
&groupsym1=areas&groupcolorminval1=0&groupcolormaxval1=20000000
&grouplegsym1=off&grouplegtext1=Population (millions)
&group1=census&colorscaleitem1=1960&legtext1=1960
&group2=census&colorscaleitem2=1970&legtext2=1970
&group3=census&colorscaleitem3=1980&legtext3=1980
&group4=census&colorscaleitem4=1990&legtext4=1990
&group5=census&colorscaleitem5=2000&legtext5=2000
&legsym5=on&legscl5=0.000001&legfmt5=0.0f&colorscalelegtext5=off
&zoominit=25.5,-124.5|50.5,-65.5'></script>