For in a hash table

I was wondering if it's possible to do a for loop with a hash table. I know how to do it in python but I'm new to Javascript and don't really know how to do it for unity.


for item in hashtable:
   print hashtable[item]

The item returns the key and the print will return the value. What would be the equivalent in Javascript?

for (var item : DictionaryEntry in hashtable)
    print (item.Value);