Ajax with php and mysql

Hello , I need someone to make a small script , made it by ajax,php and mysql. This small script is is for selecting values from mysql, for example: I have tables in the database called "manufacturers and laptops" manufacturers table has 3 fields: id name description ------------ laptops table has 5 fields: id name description parice manufacturerid The user must to select by selecting from with options the manufacturer and another select will shown with the related laptops . and the user will select from the second select the laptop that he needs and will open a label filed with the description and another one for the price. That's all , there is a picture in attachment you can check it and see what I meant. my Budget is around 20$ maximum , but I can not select less than 30$ Thank you,