Send form data with jquery to php file on_change? RESOLVED

Send form data with jquery to php file on_change? RESOLVED

so basically what i am wanting to accomplish

html > input field > customer types in field > as customer types in field jquery send what is typed and the field id to a php file > php store value as session variable

now i know how to store the php variable i just dont know how to get JQuery to send the input id and the value to the php file

please help