Posting contents of an SVG doc to sever

[SamIAm]

I have an svg doc that is embedded in a aspx page i.e.
<embed src='mySVGDoc' width='147' height='147' id='svgDoc'
type='image/svg+xml'/>

Its layers gets manipulated on the client. I need to get the contents of the
manipulated doc and post it to the server. I currently use the JavaScript
and the svg dom to get the content out of the file and then post the string
of SVG up to the server. This causes the client CPU too much stress. Is
there another way of posting the file/contents up to the server?

Thanks,

S