Javascript, using one single local object instead of many local variables

I often use jslint and tools to verify my code for programming errors, etc...

During the course of my programming I often find that I need a local variable or a local function to do some simple things. So I go to my main single var statement at the top of my local scope and adjust it, sometimes breaking my creative flow. So sometimes instead I declare a single line var in the middle of my code to continue my programming and then move it at the top var statement during refactoring afterwards.

I had an idea today that i want to explore and did not find anything on it on Google or stackoverflow.

My idea is this, just declare a single temp object and use it for whatever the need. Ex: adding some attribute for a new variable or function.

So instead of :

// if I omit the last comma, the next variable will be a global
var variable1 = "Hello World!",  
variable2 = "Testing...";  

(... some code ...)
var variable3 = 42;

I would instead use :

var temp = {};
temp.variable1 = "Hello World!";
temp.variable2 = "Testing...";

(... some code ...)
temp.variable3 = 42;

So I do not risk polluting the global namespace, I declare variable as needed and do not struggle with that var statement since I always know that a variable preceded by "temp." is in the local scope.

Any comment or advice will be appreciated.