As I have stated previously, if you are not using Visual Studio to edit your Dynamics CRM JavaScript, you are doing yourself a huge disservice.
Consider this code:
Can you spot the problem? Visual Studio and Resharper did.
Notice the blue line under Industrytotal? It is there because Industrytotal has not been defined previously. Actually, Industrytotal is a typo. It should be industrytotal. Remember that JavaScript is case sensitive and is a dynamics language.
So basically, the code is assigning a value to a variable which is never used. This is perfect legal, but useless, JavaScript.