a garden spider
Could be a Black and Yellow garden spider, common the US west coast.
check it out it is in Australia seriously it is
a spider known as a cross spider usaually found in the uk
a little spider black legs and yellow back with black spots
The black and yellow garden spider is a black- and yellow-bodied spider whose back is marked with white. The arachnid in question may be found throughout Canada and the United States of America. It numbers among the most recognizable of garden arachnids.
A jumping spider such as the one you've described typically belong to the arachnid family called Salticidae. The particular one you've described sounds like it may be a Jotus auripes. The spiders in this family are not venomous. Without seeing the spider identification isn't certain, so you shouldn't try to handle the spider until positive identification can be made.
Argiope aurantia Lucas - yellow garden spider
no spider can kill you What?! There are many spiders that CAN kill you! By the way, no, it most likely won't.
grass spider
It sounds like you may have found a Yellow Garden Spider or an Orchard Orbweaver. These spiders are commonly found in Oklahoma and have a distinctive yellow design on their backs. They are not harmful to humans and are beneficial for controlling insect populations in gardens.
The spider you are describing sounds like a daring jumping spider (Phidippus audax). They are known for their black and furry bodies with white spots on their backs and white stripes on their legs. Daring jumping spiders are commonly found throughout North America.
The Black Widow Spider has either a yellow, red, or orange hourglass, but sometimes can look like a dot. Links: http://mysite.verizon.net/vzer75kc/