Mobile: Can't figure out how to modify SVG

For the mobile to work, the svg charts has to shrink but the svg
amCharts generated has its set width and hight.
Found
this:http://soqr.fr/testsvg/embed-svg-liquid-layout-responsive-web-desig
n.php, but we still need to modify the svg: remove the width and height
and add “preserveAspectRatio="xMinYMin meet" viewBox="0 0 800 960"”