Google Charts POLY problem with VS 2010 image map

Hi I am using http://code.google.com/apis/chart/docs/gallery/googleometer_chart.html

I have:

<img src="http://chart.apis.google.com/chart?cht=bvg&chs=250x150&chd=s:egbdf&chxt=x,y&chxs=0,ff0000,12,0,lt|1,0000ff,10,1,lt&chm=o,000000,0,-1,10|V,000000,0,-1,1:15,,:4:10|H,000000,0,-1,3:9,,:8:17&chxl=0:|E|G|B|D|F" usemap ="#chart" />
           <map name='chart'>
                <area name='bar0_0' shape='POLY' coords= '124,440,124,499,143,440,143,498' href='#'>
                <area name='bar0_1' shape='RECT' coords='55,129,78,63' href='#'>
            </map>

When I use 'rect' for shape I can atta开发者_C百科ch a click event etc but when I use 'poly' It doesn't work.

I've use a jQuery mouse position plug in to check the coords and they seem ok.

Can anyone help please?

Thanks

put image into something like paint and get it's coordinates, not the coordinates on the web page Obviosuly, so it will still work anywhere on the page.