I need <select> and <onchange> attribute dropdown menu, The menu is already created. But i want it to change when i click on certain criteria .
For example. If i select Samsung i want all Samsung models to appear. If i select HTC i want all htc models to appear. If i select Blackberry i want all blackerry phones to appear. I need this done now, so if you cannot complete this project fast please do not bid, i do not want to hear next day or couple hours to complete