There are a few problems here.
You should use JSLint which is a very good JavaScript quality assurance tool. This will validate your JavaScript and point out any apparent problems.
First:
aircon = “yes”
should be
aircon == “yes”
secondly:
if result = “Lambourghini Aventador”)
should be
if (result == “Lambourghini Aventador”)
thirdly
result = “some form of SUV”
should be
result = “some form of SUV”;
fourthly
refrain from using ==, instead use the JavaScript standard ===
Read why here in this very good Stackoverflow post!
Missed “==” near aircon=”yes” and missed a bracket “(” near if statement at “if result = “Lambourghini Aventador”)”.