我如何编写一个javascript警告框来提出是或否问题并与php调用集成？

i am trying to figure out how to create a javascript alert box asking the user if they would like to delete a record (that their viewing) and when the user presses yes a query is called through php to delete a database row. and if the user presses no nothing will happend.i am trying to figure out how to create a javas