Is it possible to set drop shadow for an svg element using css3 , something like
box-shadow: -5px -5px 5px #888;
-webkit-box-shadow: -5px -5px 5px #888;
Here's an example of applying dropshadow to some svg using the 'filter' property. If you want to control the opacity of the dropshadow have a look at this example. The slope
attribute controls how much opacity to give to the dropshadow.
Relevant bits from the example:
Box-shadow is defined to work on CSS boxes (read: rectangles), while svg is a bit more expressive than just rectangles. Read the SVG Primer to learn a bit more about what you can do with SVG filters.