i want my own pascal code to be executed it also have some uses files and other complex functions just like a Delphi code can i do this
Yes:
This component is used in the highly popular Inno Setup installer software.
Depends how much pascal you want to interpret. Pascal Script will interpret most stuff but you can't declare classes in a script (You can however import them using script functions). You can't use "uses" clauses either.
If you want to do full on pascal support you're going to have to compile it. You could probably use the FreePascal one providing your app's licensing is compatible (GPL).
Another option, which is useful if you want to support more than just Pascal syntax, would be Fast-Script by the makers of Fast-Report.
Delphi Web Script is now under active development again.
Previously it was good; now it is becoming great.
You can download it on Google Code.
--jeroen