11. A method for developing and executing supervisory process control and manufacturing information applications including scripts, the method comprising: specifying, by a script editor interface, scripts for objects, wherein the script editor interface supports multiple distinct user-side script languages; inserting the user-side scripts to customize an object prior to execution of the instructions within the object; inserting post-execution user-side scripts to an object; rendering, by a script translation component, execution-side script of a single execution-side scripting language from source script rendered by the script editor and written according to any of a set of user-side script languages; wherein the user-side script languages comprise a plurality of script languages and wherein the script editor produces output scripts including tags indicating a particular one of plurality of user-side script languages; and executing, by a scripting engine, the execution-side script of the single execution-side scripting language generated by the script translation component during each scan cycle.
16. The method of claim 11 wherein scripts are inserted as customization pre-execution and post-execution instructions within an application object.