how to disable flash in safari

hi,

is there a easy way to switch off flash in safari? ideally i want to switch off safari on a case by case basis. meaning it's off most of the time. but when i think i need it for a special site i want to easily switch it on without any installation.

i want this mainly because i don't like flash and it slows everything down.

andi

thanks for the help. i'll try the plug in as soon as i have time. weather is too good in the moment to be stuck at a computer