<form action='https://chart.googleapis.com/chart' method='POST'>
    <input type="hidden" name="cht" value="lc"  />
    <input type="hidden" name="chtt" value="This is | my chart"  />
    <input type='hidden' name='chs' value='300x200' />
    <input type="hidden" name="chxt" value="x" />
    <input type='hidden' name='chd' value='t:40,20,50,20,100'/>
    <input type="submit"  />
</form>