how to rearrange the chart report place automatically in SSRS 2008 R2?

 Hi ,

i developed  some dash board reports which will display 15 reports in Dash Board . i provided one facility to the user to select required charts in dash board based on chart selection .

here issues is if user select only last 2 reports out of 15 Reports  then my dash board displaying free space for 13 Reports on dash board and selected reports are displaying in same page same position ..

now my requirement is if user selects required charts it should display from starting page without gap i.e only selected reports needs to display and other reports should not contain blank space in dash board.

it means free space should hide automatically based on chart selection i.e charts should re arranges its positions automaticllay

Thanks in Advance.