(JAVA SCRIPT) Helloe my I please have the privilage of one of our valued mathmathicans help me with this thanks so much : )

So in one of these programs I am working on I am told that 9th level in school will be required and this is a real problem any way what I am trying to figure out is a jump function for persay a stick figure and I am trying to figure out the physics how many varibles would I need I am thinking to like one that represents the jump and gravity  

so I have

var = Jump (0);  

and I have 

var = gravity 

I need to figure out an equation that will stop and translate down on the canvas at an accelerating rate.